WEBVTT

1
00:00:03.480 --> 00:00:04.880
Just have to catch up.

2
00:00:06.360 --> 00:00:07.960
Like Michele said.

3
00:00:08.040 --> 00:00:11.333
My name is Erin Keys and I am the engineering and ...

4
00:00:11.333 --> 00:00:13.967
operations manager for the sanitary,

5
00:00:13.967 --> 00:00:17.919
sewer and stormwater utilities for the city of Columbia.

6
00:00:18.800 --> 00:00:21.320
So we are one of the action team members.

7
00:00:22.680 --> 00:00:25.946
I've been charged with giving a very brief,

8
00:00:25.946 --> 00:00:29.484
it'll be very brief overview of what the cam is,

9
00:00:29.484 --> 00:00:33.839
what the collaborative adaptive management process is.

10
00:00:34.160 --> 00:00:39.602
And that's just to catch up people who are new to the ...

11
00:00:39.602 --> 00:00:43.359
group or visiting these webinars.

12
00:00:44.320 --> 00:00:48.706
So it'll be a bit of a recap for those of us that have been in ...

13
00:00:48.706 --> 00:00:53.279
this process for a while, but I'll try to keep it real brief.

14
00:00:54.760 --> 00:00:59.573
Probably the main item is, if you want more information ...

15
00:00:59.573 --> 00:01:02.712
to check out the website, which is at ...

16
00:01:02.712 --> 00:01:05.118
www.helpthehinkson.boonemo.gov.

17
00:01:06.680 --> 00:01:08.240
and Michele, are you seeing.

18
00:01:08.280 --> 00:01:09.889
Is everybody seeing my slides?

19
00:01:09.889 --> 00:01:10.879
Okay? I guess. Yep.

20
00:01:10.920 --> 00:01:12.120
I can see them perfectly.

21
00:01:12.240 --> 00:01:16.600
Okay, so like I said, this.

22
00:01:16.680 --> 00:01:17.800
Welcome to everybody.

23
00:01:17.880 --> 00:01:21.849
We're excited to present some of the recent work ...

24
00:01:21.849 --> 00:01:25.719
that's been done on the Hinkson, some studies.

25
00:01:25.880 --> 00:01:30.994
And we wanted to have this three teams meeting a year ...

26
00:01:30.994 --> 00:01:34.919
ago, and we've had to delay it until now.

27
00:01:35.360 --> 00:01:39.148
I think we have a good alternative that may be even ...

28
00:01:39.148 --> 00:01:43.399
more convenient for people to learn this information.

29
00:01:43.560 --> 00:01:46.200
And I just.

30
00:01:46.280 --> 00:01:49.152
I'm looking forward to the opportunity for us to ...

31
00:01:49.152 --> 00:01:52.598
collaborate with all the teams together so we can all hear ...

32
00:01:52.598 --> 00:01:55.685
the same information and maybe give each other some ...

33
00:01:55.685 --> 00:01:58.198
feedback on what our next steps need to be.

34
00:01:59.360 --> 00:02:02.963
So to kick off what is the Hinkson Creek collaborative ...

35
00:02:02.963 --> 00:02:04.999
adaptive management process?

36
00:02:07.280 --> 00:02:10.743
Our main goal is to address the impairments of Hinkson ...

37
00:02:10.743 --> 00:02:14.359
Creek relating to low macroinvertebrate populations.

38
00:02:14.920 --> 00:02:17.575
So kind of just extremely briefly,

39
00:02:17.575 --> 00:02:19.039
how did we get here?

40
00:02:19.040 --> 00:02:24.040
Hinkson Creek was listed on the 303 D list.

41
00:02:24.520 --> 00:02:28.180
So this is a regulatory mechanism to address the ...

42
00:02:28.180 --> 00:02:30.559
impairments on Hinkson Creek.

43
00:02:30.720 --> 00:02:33.200
So Hinkson Creek was on the 303 D list,

44
00:02:33.200 --> 00:02:36.400
that there was a TMDL, a total maximum daily load ...

45
00:02:36.400 --> 00:02:38.240
issued for Hinkson Creek.

46
00:02:38.320 --> 00:02:42.402
But they were not able to determine what the pollutant ...

47
00:02:42.402 --> 00:02:47.119
was that was causing our low macroinvertebrate populations.

48
00:02:48.280 --> 00:02:53.071
So the five parties you see there came to an agreement ...

49
00:02:53.071 --> 00:02:57.318
to use the collaborative adaptive management ...

50
00:02:57.318 --> 00:03:01.238
process to try to address the impairments.

51
00:03:01.320 --> 00:03:03.442
One, to try to figure out what was ...

52
00:03:03.442 --> 00:03:06.036
causing the impairments, and then two,

53
00:03:06.036 --> 00:03:10.359
to address that to increase our macroinvertebrate populations.

54
00:03:10.520 --> 00:03:12.960
So that's why a lot of what we do.

55
00:03:13.160 --> 00:03:18.305
One of the presentations we'll have later in this series will ...

56
00:03:18.305 --> 00:03:21.432
be about the macroinvertebrates and ...

57
00:03:21.432 --> 00:03:26.879
looking a little more in depth into what might be impacting them.

58
00:03:27.760 --> 00:03:30.261
So the EPA, Missouri Department of ...

59
00:03:30.261 --> 00:03:33.280
Natural Resources, the city of Columbia,

60
00:03:33.280 --> 00:03:36.299
Boone county, and University of Missouri ...

61
00:03:36.299 --> 00:03:39.749
have agreed to use this collaborative adaptive ...

62
00:03:39.749 --> 00:03:43.372
management process, and it is well suited for this ...

63
00:03:43.372 --> 00:03:44.838
complex situation.

64
00:03:45.200 --> 00:03:47.326
So, for those of you that know,

65
00:03:47.326 --> 00:03:50.727
an adaptive management process is a scientific ...

66
00:03:50.727 --> 00:03:54.639
methodology that where you assess the problem and then ...

67
00:03:54.639 --> 00:03:58.381
come up with a solution for that problem and act on it,

68
00:03:58.381 --> 00:04:00.932
and then you monitor your solution,

69
00:04:00.932 --> 00:04:03.398
you evaluate, and then you adjust.

70
00:04:03.600 --> 00:04:06.067
Well, the collaborative adaptive ...

71
00:04:06.067 --> 00:04:09.214
management process takes it a step further,

72
00:04:09.214 --> 00:04:13.127
and you have a stakeholder based group that looks at the ...

73
00:04:13.127 --> 00:04:14.998
scientific methodology.

74
00:04:15.120 --> 00:04:20.026
So you can also incorporate some of the socioeconomics ...

75
00:04:20.026 --> 00:04:23.759
that are involved in making decisions to,

76
00:04:23.759 --> 00:04:26.639
in this case, improve the creek.

77
00:04:28.160 --> 00:04:33.009
So at the bottom there, I've got what the stakeholders ...

78
00:04:33.009 --> 00:04:37.211
have put on all of their agendas most recently,

79
00:04:37.211 --> 00:04:41.413
and it's their mission, and they require that a ...

80
00:04:41.413 --> 00:04:47.016
project to move forward must clearly and specifically relate ...

81
00:04:47.016 --> 00:04:51.757
to removing Hinkson Creek from its impaired status.

82
00:04:52.080 --> 00:04:54.645
And again, the impaired status has to do ...

83
00:04:54.645 --> 00:04:57.599
with the low macroinvertebrate population.

84
00:04:59.840 --> 00:05:04.240
So the collaborative adaptive management process has three teams.

85
00:05:04.400 --> 00:05:06.187
We have a stakeholder committee,

86
00:05:06.187 --> 00:05:08.613
which is made up of local interested parties,

87
00:05:08.613 --> 00:05:11.039
and they carry out the tasks of the agreement.

88
00:05:11.200 --> 00:05:15.034
And it consists of private landowners,

89
00:05:15.034 --> 00:05:20.959
business interests, environmental interests, education.

90
00:05:21.040 --> 00:05:23.876
We have a member from the school board on there,

91
00:05:23.876 --> 00:05:25.039
local government.

92
00:05:25.160 --> 00:05:29.920
And then the EPA is our mediator for that process.

93
00:05:30.960 --> 00:05:32.865
Then there's the science team,

94
00:05:32.865 --> 00:05:35.283
and they're charged with identifying,

95
00:05:35.283 --> 00:05:37.847
evaluating, and advancing the different ...

96
00:05:37.847 --> 00:05:40.558
scientific studies to support the process.

97
00:05:41.400 --> 00:05:45.895
It includes scientists, professionals from USGS,

98
00:05:45.895 --> 00:05:50.703
Department of Conservation, University of Missouri,

99
00:05:50.703 --> 00:05:51.539
DNR, EPA,

100
00:05:51.539 --> 00:05:53.838
and private consultants.

101
00:05:54.200 --> 00:05:56.731
And then the action team, which is what I'm a member ...

102
00:05:56.731 --> 00:05:58.479
of, includes the MS four partners.

103
00:05:58.560 --> 00:06:02.560
And Ms four stands for municipal separate storm sewer system.

104
00:06:02.680 --> 00:06:04.280
So M and four s's.

105
00:06:04.400 --> 00:06:10.720
And that's our permit holder for this urban area.

106
00:06:10.840 --> 00:06:12.820
And that includes the city of Columbia,

107
00:06:12.820 --> 00:06:15.160
Boone county, and the University of Missouri.

108
00:06:15.320 --> 00:06:18.139
Also on the action team is the Boone County Regional ...

109
00:06:18.139 --> 00:06:20.696
Sewer District and the Missouri Department of ...

110
00:06:20.696 --> 00:06:21.679
Transportation.

111
00:06:21.840 --> 00:06:26.841
And we act as a liaison group to carry out the identified ...

112
00:06:26.841 --> 00:06:30.319
tasks that the stakeholders approve.

113
00:06:32.320 --> 00:06:36.106
So the Cam riparian committee was formed by the ...

114
00:06:36.106 --> 00:06:39.018
stakeholders during this process,

115
00:06:39.018 --> 00:06:43.678
and that includes stakeholders and action team members.

116
00:06:43.840 --> 00:06:46.669
And I think there's some other ad hoc members,

117
00:06:46.669 --> 00:06:50.467
and they're exploring ways to increase riparian areas in the ...

118
00:06:50.467 --> 00:06:52.999
Hinkson Creek, which was an action item.

119
00:06:53.160 --> 00:06:57.081
And they are also pursuing funding through the USDA ...

120
00:06:57.081 --> 00:07:02.279
for some rural properties in the watershed to do some improvements.

121
00:07:02.840 --> 00:07:07.472
So that is kind of another subgroup of the cam process ...

122
00:07:07.472 --> 00:07:09.999
that's doing some good work.

123
00:07:11.520 --> 00:07:15.777
So some of the official cam projects that most of these ...

124
00:07:15.777 --> 00:07:17.479
have been completed.

125
00:07:17.600 --> 00:07:20.065
And again, you can find more information ...

126
00:07:20.065 --> 00:07:23.400
about cam on the website, www.helpthehinkson.boonemo.gov.

127
00:07:24.360 --> 00:07:27.880
One of our first actions was the physical habitat assessment.

128
00:07:28.040 --> 00:07:32.568
And that's where we used gis to evaluate a moment in time ...

129
00:07:32.568 --> 00:07:36.407
of what Hinkson Creek looked like as far as the ...

130
00:07:36.407 --> 00:07:38.179
geography, geology,

131
00:07:38.179 --> 00:07:40.541
how wide the creek was, deep,

132
00:07:40.541 --> 00:07:45.168
where there was sediment, where there wasn't sediment,

133
00:07:45.168 --> 00:07:48.023
just a bunch of different aspects,

134
00:07:48.023 --> 00:07:50.878
physical aspects about the creek.

135
00:07:52.080 --> 00:07:53.080
And then.

136
00:07:53.240 --> 00:07:56.776
So we'll have that to compare to in the future,

137
00:07:56.776 --> 00:07:58.079
should we use it.

138
00:07:58.240 --> 00:08:01.600
You can find that there's a Gis link on the website.

139
00:08:03.440 --> 00:08:06.672
One of the other early actions was the forum nature area ...

140
00:08:06.672 --> 00:08:09.061
level spreader, which our speaker Laura ...

141
00:08:09.061 --> 00:08:11.239
Wiseman is going to talk about today.

142
00:08:12.240 --> 00:08:14.962
We had the flow and sediment study which was ...

143
00:08:14.962 --> 00:08:17.759
performed by Doctor Jason Hubbard of Munch.

144
00:08:17.840 --> 00:08:21.721
And one of the big things that came out of that was the ...

145
00:08:21.721 --> 00:08:24.519
significance of our riparian areas.

146
00:08:24.840 --> 00:08:28.120
And so that was kind of the impetus for starting the ...

147
00:08:28.120 --> 00:08:29.760
riparian subcommittee.

148
00:08:31.960 --> 00:08:35.045
Then we have the settlement mapping project,

149
00:08:35.045 --> 00:08:37.724
which Boone county has been working on,

150
00:08:37.724 --> 00:08:41.297
and the El Chaparral riparian Restoration project,

151
00:08:41.297 --> 00:08:44.707
which that came out of our riparian subcommittee,

152
00:08:44.707 --> 00:08:48.117
where we're trying to improve our riparian areas.

153
00:08:48.160 --> 00:08:50.863
And again, the riparian areas are those ...

154
00:08:50.863 --> 00:08:54.795
areas next to the creek that can either be preferably some ...

155
00:08:54.795 --> 00:08:56.679
kind of native vegetation.

156
00:08:58.520 --> 00:09:02.034
Then we have the aquatic macroinvertebrate data ...

157
00:09:02.034 --> 00:09:05.205
mining project, which Geosyntec is going to ...

158
00:09:05.205 --> 00:09:08.119
talk about in our presentation April 15.

159
00:09:09.040 --> 00:09:13.987
And then Doctor Argaridge from Mu is doing a synoptic ...

160
00:09:13.987 --> 00:09:17.359
sampling project of Hinkson Creek.

161
00:09:18.440 --> 00:09:22.235
So those are some of the action items that this group ...

162
00:09:22.235 --> 00:09:23.559
has already done.

163
00:09:25.480 --> 00:09:30.117
There is a number of other projects that occur in Hinkson ...

164
00:09:30.117 --> 00:09:33.965
Creek that aren't specifically cam projects,

165
00:09:33.965 --> 00:09:38.010
but they're projects that the MS four partners or ...

166
00:09:38.010 --> 00:09:42.055
nonprofits or private businesses are working on ...

167
00:09:42.055 --> 00:09:44.916
that also benefit Hinkson Creek.

168
00:09:45.040 --> 00:09:47.180
So it's good to keep those in mind,

169
00:09:47.180 --> 00:09:49.702
the various native planting projects,

170
00:09:49.702 --> 00:09:51.918
those are beneficial to our creek.

171
00:09:52.120 --> 00:09:54.396
There's a lot of best management practices,

172
00:09:54.396 --> 00:09:56.734
and typically, like the level spreader we're ...

173
00:09:56.734 --> 00:09:58.518
going to talk about in a little bit.

174
00:09:58.640 --> 00:10:02.423
A best management practice is something that will slow ...

175
00:10:02.423 --> 00:10:05.631
the water down, allow it to infiltrate into the ...

176
00:10:05.631 --> 00:10:07.687
ground and remove some of the,

177
00:10:07.687 --> 00:10:08.838
the pollutants.

178
00:10:09.640 --> 00:10:12.613
And because Hinkson Creek, you know,

179
00:10:12.613 --> 00:10:18.079
it has the unknown pollutant that is causing some of our impairment.

180
00:10:18.640 --> 00:10:21.877
Whatever we can, however we can filter out that ...

181
00:10:21.877 --> 00:10:25.280
water to improve it, is going to improve the creek ...

182
00:10:25.280 --> 00:10:26.359
in the long run.

183
00:10:27.120 --> 00:10:31.277
We have ordinances and design standards that both ...

184
00:10:31.277 --> 00:10:35.335
the city and county and mu have put into place that ...

185
00:10:35.335 --> 00:10:36.918
benefit the creek.

186
00:10:37.240 --> 00:10:39.779
When we do any kind of development,

187
00:10:39.779 --> 00:10:43.544
sanitary sewer projects, a lot of projects that the ...

188
00:10:43.544 --> 00:10:47.309
sewer district has done to remove those discharges ...

189
00:10:47.309 --> 00:10:51.599
from sanitary sewer treatment facilities from the creek,

190
00:10:51.599 --> 00:10:53.437
that improves the creek.

191
00:10:53.600 --> 00:10:56.520
And then education is probably one of our.

192
00:10:56.720 --> 00:10:59.554
We always consider that the biggest bang for the buck as ...

193
00:10:59.554 --> 00:11:02.080
far as improving the creek, because so much of the ...

194
00:11:02.080 --> 00:11:04.359
pollution in the creek is people pollution.

195
00:11:04.400 --> 00:11:06.800
So what we can, however,

196
00:11:06.800 --> 00:11:11.240
we can best educate people to take care of our ...

197
00:11:11.240 --> 00:11:14.480
environment in different ways.

198
00:11:15.320 --> 00:11:19.186
Different tips and tricks to reduce the pollutant load on ...

199
00:11:19.186 --> 00:11:21.199
our creeks is through a lot of.

200
00:11:21.240 --> 00:11:22.440
That's through education.

201
00:11:24.640 --> 00:11:30.440
And I meant to mention one of the things that occurred is.

202
00:11:31.040 --> 00:11:34.200
And that was back on the previous slide.

203
00:11:34.360 --> 00:11:38.107
So for the aquatic macroinvertebrate data ...

204
00:11:38.107 --> 00:11:41.958
mining project, as part of the TMDL process,

205
00:11:41.958 --> 00:11:45.809
MD and R did a lot of sampling of Hinkson Creek ...

206
00:11:45.809 --> 00:11:50.597
for both water quality and of the macroinvertebrates.

207
00:11:50.760 --> 00:11:53.482
And then once we started this cam process,

208
00:11:53.482 --> 00:11:54.959
they agreed to do well.

209
00:11:55.000 --> 00:11:58.417
Initially it was three years, but it ended up being five ...

210
00:11:58.417 --> 00:11:59.531
years, I believe,

211
00:11:59.531 --> 00:12:01.759
of intensive sampling of the creek.

212
00:12:01.880 --> 00:12:06.040
And so there's a lot of data there in that sampling.

213
00:12:06.840 --> 00:12:10.296
And so that was part of our data mining project,

214
00:12:10.296 --> 00:12:14.550
was to dive a little bit deeper into that data to maybe help ...

215
00:12:14.550 --> 00:12:18.272
us figure out what some of the impairments are with ...

216
00:12:18.272 --> 00:12:21.905
Hinkson Creek that maybe we can address with some ...

217
00:12:21.905 --> 00:12:23.677
kind of an improvement.

218
00:12:23.880 --> 00:12:29.920
So that is a really fast overview of the cam process.

219
00:12:30.760 --> 00:12:34.920
So I'll see if anybody has any questions at this time.

220
00:12:35.600 --> 00:12:39.269
And if not, then we'll turn it over to Laura ...

221
00:12:39.269 --> 00:12:43.986
so she can talk about one of these action projects that ...

222
00:12:43.986 --> 00:12:45.558
we've completed.

223
00:12:47.800 --> 00:12:50.492
I don't have any coming in through the chat,

224
00:12:50.492 --> 00:12:53.632
but if anybody has any pressing questions and they ...

225
00:12:53.632 --> 00:12:56.398
want to unmute themselves, now is your time.

226
00:13:00.800 --> 00:13:01.680
All right.

227
00:13:03.360 --> 00:13:06.920
Okay, well, on to Laura.

228
00:13:12.200 --> 00:13:12.802
So, Laura,

229
00:13:12.802 --> 00:13:15.279
are you able to introduce yourself, please?

230
00:13:15.480 --> 00:13:16.413
Oh, yes,

231
00:13:16.413 --> 00:13:18.279
I can. Thank you.

232
00:13:18.360 --> 00:13:19.880
My name is Laura Wiseman.

233
00:13:20.000 --> 00:13:24.358
I graduated from the zoo last May with my master's degree ...

234
00:13:24.358 --> 00:13:26.119
in civil engineering.

235
00:13:26.240 --> 00:13:29.806
And I'm going to be presenting today on the level ...

236
00:13:29.806 --> 00:13:33.639
spreader project that I did with Doctor Enos Innis.

237
00:13:33.760 --> 00:13:38.347
And if I can pull up the PowerPoint,

238
00:13:38.347 --> 00:13:40.719
where did that go?

239
00:13:52.080 --> 00:13:54.520
All right, are you all able to see my PowerPoint?

240
00:13:57.960 --> 00:13:59.800
Yes.  Okay.

241
00:13:59.960 --> 00:14:01.807
All right, so today I'm going to be ...

242
00:14:01.807 --> 00:14:04.973
presenting on my project the monitoring of an urban level ...

243
00:14:04.973 --> 00:14:07.611
spreader as part of the collaborative adaptive ...

244
00:14:07.611 --> 00:14:08.798
management process.

245
00:14:09.360 --> 00:14:12.198
And this project falls under the umbrella of the cam ...

246
00:14:12.198 --> 00:14:15.960
process because it's located within the Hanks and creek watershed.

247
00:14:16.040 --> 00:14:18.320
And that's what's shown here in this map.

248
00:14:18.800 --> 00:14:20.680
Hinkson Creek is here in blue.

249
00:14:20.760 --> 00:14:23.947
And then the location of our study site at the level ...

250
00:14:23.947 --> 00:14:25.919
spreader is this red star here.

251
00:14:27.920 --> 00:14:30.360
So sort of an outline of the presentation.

252
00:14:30.440 --> 00:14:33.776
I'm going to go over some really quick background first ...

253
00:14:33.776 --> 00:14:35.734
on just what is a level spreader,

254
00:14:35.734 --> 00:14:38.490
what are the components, what is the purpose,

255
00:14:38.490 --> 00:14:40.593
then the objectives of this study,

256
00:14:40.593 --> 00:14:43.494
and then I'll continue on to the first part of the ...

257
00:14:43.494 --> 00:14:46.105
presentation, which is calculation of the ...

258
00:14:46.105 --> 00:14:48.716
water balance for an urban level spreader.

259
00:14:48.760 --> 00:14:51.584
So how did I calculate with the methods,

260
00:14:51.584 --> 00:14:55.350
and then some results, and then finally conclusions ...

261
00:14:55.350 --> 00:14:59.373
and some recommendations relating to how effective the ...

262
00:14:59.373 --> 00:15:03.396
local spreader system is at attenuating storm flows and ...

263
00:15:03.396 --> 00:15:05.279
controlling stormwater.

264
00:15:05.480 --> 00:15:08.200
And then after that we'll probably break and have ...

265
00:15:08.200 --> 00:15:10.920
questions on the first part of the presentation.

266
00:15:11.200 --> 00:15:14.880
And then after that I'll continue on with site selection.

267
00:15:15.440 --> 00:15:20.052
So that is the creation of the GIS map tool for the Cam ...

268
00:15:20.052 --> 00:15:24.879
partners for choosing sites for new level spreaders.

269
00:15:25.680 --> 00:15:28.680
The results of the GIS map tool.  Oops.

270
00:15:31.400 --> 00:15:33.773
The results, some field verification,

271
00:15:33.773 --> 00:15:36.650
and then I'll end with recommendations and some ...

272
00:15:36.650 --> 00:15:39.239
general conclusions for the entire study.

273
00:15:39.680 --> 00:15:43.910
So before we move on, I wanted to show this aerial ...

274
00:15:43.910 --> 00:15:45.919
view of the study area.

275
00:15:46.080 --> 00:15:47.800
You can see here in green.

276
00:15:47.920 --> 00:15:50.963
That's the small tributary stream that meets the ...

277
00:15:50.963 --> 00:15:53.858
Hinkson Creek here that serves as the source of ...

278
00:15:53.858 --> 00:15:56.159
stormwater with the level spreader.

279
00:15:56.160 --> 00:15:58.570
And then you can also see the diverter box,

280
00:15:58.570 --> 00:16:01.599
which holds water back in the level spreader itself.

281
00:16:04.080 --> 00:16:07.445
So level spreaders are a stormwater management ...

282
00:16:07.445 --> 00:16:11.314
practice that is usually used to move stormwater out of ...

283
00:16:11.314 --> 00:16:14.679
enclosed or channelized systems and allow it to ...

284
00:16:14.679 --> 00:16:17.118
spread out over a much larger area.

285
00:16:17.880 --> 00:16:21.306
Level spreaders are usually designed with the goals of ...

286
00:16:21.306 --> 00:16:25.030
increasing infiltration and attenuating peak stormwater ...

287
00:16:25.030 --> 00:16:26.519
flows from small areas.

288
00:16:27.400 --> 00:16:30.450
So each component of the level spreader will have a role ...

289
00:16:30.450 --> 00:16:32.439
in the function of the whole system.

290
00:16:32.960 --> 00:16:36.078
When stormwater first reaches the level spreader,

291
00:16:36.078 --> 00:16:39.123
it will usually go through some type of a diversion ...

292
00:16:39.123 --> 00:16:42.386
structure or inlethe in the case of forum nature area,

293
00:16:42.386 --> 00:16:45.649
the water source is a small tributary we saw in the last ...

294
00:16:45.649 --> 00:16:47.752
slide, and it flows downhill until ...

295
00:16:47.752 --> 00:16:50.797
finally it's collected behind this diverter box.

296
00:16:51.240 --> 00:16:54.894
The box has an under drain that we will see again later ...

297
00:16:54.894 --> 00:16:58.382
that allows only a small amount of flow to continue ...

298
00:16:58.382 --> 00:17:00.707
down the main tributary channel,

299
00:17:00.707 --> 00:17:04.361
and the excess water backs up into the level spreader ...

300
00:17:04.361 --> 00:17:06.437
basin, which is here and here.

301
00:17:07.400 --> 00:17:11.248
And it's stilled and slowed down as the water level rises ...

302
00:17:11.248 --> 00:17:12.639
inside of this area.

303
00:17:13.280 --> 00:17:15.742
Once the water reaches a certain height,

304
00:17:15.742 --> 00:17:17.914
it overtops the level spreader lip,

305
00:17:17.914 --> 00:17:21.679
which is this structure, evenly across the whole length of it.

306
00:17:24.560 --> 00:17:28.831
It transitions into sheet flow as it overtops the level ...

307
00:17:28.831 --> 00:17:32.359
spreader and moves into the downstream area.

308
00:17:32.520 --> 00:17:36.092
So the reason we want sheet flow is because it's generally ...

309
00:17:36.092 --> 00:17:38.399
less erosive than channelized flow.

310
00:17:38.520 --> 00:17:41.618
It can move a little bit slower, and it can cover over a larger ...

311
00:17:41.618 --> 00:17:44.839
area of the ground, which gives more chance for infiltration.

312
00:17:45.960 --> 00:17:48.608
So the downstream area is the last component,

313
00:17:48.608 --> 00:17:51.883
and it's just as important as any of the other components ...

314
00:17:51.883 --> 00:17:55.367
because it really has to have certain characteristics that ...

315
00:17:55.367 --> 00:17:59.199
make it ideal for infiltration, for maintaining that sheet flow.

316
00:17:59.400 --> 00:18:02.125
And it has to be located in such a way that its ...

317
00:18:02.125 --> 00:18:05.759
stormwater management use won't disrupt its other uses.

318
00:18:09.080 --> 00:18:12.682
So that's the location of this study and the level spreader ...

319
00:18:12.682 --> 00:18:14.079
that we investigated.

320
00:18:14.520 --> 00:18:18.251
So the two objectives of this study were to characterize ...

321
00:18:18.251 --> 00:18:21.267
the processes that are occurring as the level ...

322
00:18:21.267 --> 00:18:24.918
spreader distribute stormwater into the floodplain.

323
00:18:25.000 --> 00:18:26.520
So what's happening?

324
00:18:26.640 --> 00:18:29.941
How is it distributing that water and then using that ...

325
00:18:29.941 --> 00:18:33.317
water balance to evaluate whether the level spreader ...

326
00:18:33.317 --> 00:18:37.518
actually increases infiltration and attenuates the storm flows?

327
00:18:37.960 --> 00:18:40.701
The second goal was to use the results,

328
00:18:40.701 --> 00:18:44.384
along with some other site selection criteria from ...

329
00:18:44.384 --> 00:18:48.495
literature and other studies, to develop a tool that will ...

330
00:18:48.495 --> 00:18:52.520
allow different entities in the CAM partnership to find ...

331
00:18:52.520 --> 00:18:55.518
potential sites for new level spreaders.

332
00:18:59.560 --> 00:19:02.851
So the total amount of water entering and leaving the level ...

333
00:19:02.851 --> 00:19:05.806
spreader for a given storm can be broken up into these ...

334
00:19:05.806 --> 00:19:08.559
five different components of the water balance.

335
00:19:08.720 --> 00:19:12.444
Inputs on the left include direct precipitation onto the ...

336
00:19:12.444 --> 00:19:16.013
site and inflow from that tributary that comes from the ...

337
00:19:16.013 --> 00:19:19.039
upper watershed, some outflows that are here.

338
00:19:19.040 --> 00:19:23.252
On the right water leaves the level spreader as outflow,

339
00:19:23.252 --> 00:19:27.554
either through that diverter box under drain I discussed ...

340
00:19:27.554 --> 00:19:31.318
earlier, or as sheet flow over the level spreader.

341
00:19:31.480 --> 00:19:36.157
It also can leave as infiltration into that area behind the level ...

342
00:19:36.157 --> 00:19:38.408
spreader and in the basin area,

343
00:19:38.408 --> 00:19:41.959
or as evaporation or transpiration from plants.

344
00:19:43.520 --> 00:19:45.007
So, in order to use this water ...

345
00:19:45.007 --> 00:19:47.919
balance equation, I had to make a couple of assumptions.

346
00:19:48.320 --> 00:19:50.361
First, I set the time interval that I ...

347
00:19:50.361 --> 00:19:53.422
calculated the water balance over so that there was no ...

348
00:19:53.422 --> 00:19:56.279
water left ponded in the level spreader at the end.

349
00:19:56.320 --> 00:19:59.301
So that means there's no net storage of water,

350
00:19:59.301 --> 00:20:02.439
the beginning or at the end of the time interval.

351
00:20:03.200 --> 00:20:05.191
Then I chose the control area,

352
00:20:05.191 --> 00:20:08.696
which is the area that the water flows into and out of,

353
00:20:08.696 --> 00:20:12.838
to include only the diverter box basin and the level spreader.

354
00:20:13.000 --> 00:20:16.171
So I didn't include the downstream area in the water ...

355
00:20:16.171 --> 00:20:19.268
balance calculation, except as a destination for ...

356
00:20:19.268 --> 00:20:22.439
water as it leaves, as outflow over the level width.

357
00:20:22.520 --> 00:20:25.231
And this is because there's not a way to accurately ...

358
00:20:25.231 --> 00:20:28.071
measure how water leaves the downstream area or what ...

359
00:20:28.071 --> 00:20:30.718
volume of water would leave the downstream area.

360
00:20:31.520 --> 00:20:34.633
Then the last assumption I made is that there's no input ...

361
00:20:34.633 --> 00:20:37.679
or influence to the level spreader from groundwater.

362
00:20:42.280 --> 00:20:44.298
So, to start off my analysis of the ...

363
00:20:44.298 --> 00:20:47.759
water balance, I chose two different storms to evaluate.

364
00:20:48.200 --> 00:20:51.594
Both of them had about two inches of total rainfall,

365
00:20:51.594 --> 00:20:55.067
but it was sort of distributed in different patterns ...

366
00:20:55.067 --> 00:20:57.119
throughout the time interval.

367
00:20:59.360 --> 00:21:02.727
So I chose these storms with two inches of rainfall,

368
00:21:02.727 --> 00:21:06.642
because that was the amount of rainfall it takes to actually ...

369
00:21:06.642 --> 00:21:08.599
activate the level spreader.

370
00:21:08.720 --> 00:21:11.800
A lot of the smaller storms water would.

371
00:21:11.880 --> 00:21:14.646
There wouldn't be enough volume of water in that basin ...

372
00:21:14.646 --> 00:21:16.982
area to actually overtop the level spreader,

373
00:21:16.982 --> 00:21:18.519
which is what we're studying.

374
00:21:18.560 --> 00:21:21.480
So we wanted to make sure that we got enough rainfall.

375
00:21:23.480 --> 00:21:28.040
So storm one had a total precipitation depth of 1.9 inches.

376
00:21:28.160 --> 00:21:30.629
And as we can see here in this chart,

377
00:21:30.629 --> 00:21:34.119
it fell over a single time period of about 8 hours.

378
00:21:35.200 --> 00:21:39.416
Storm two had a precipitation depth of about 2.1 inches,

379
00:21:39.416 --> 00:21:43.273
but we can see that it fell sort of in two bursts here,

380
00:21:43.273 --> 00:21:47.399
and the smaller one follows the larger one by a few days.

381
00:21:47.920 --> 00:21:50.544
So, precipitation volume for both ...

382
00:21:50.544 --> 00:21:54.706
storms was calculated by multiplying the depth of rain ...

383
00:21:54.706 --> 00:21:57.601
by the total area, the level spreader,

384
00:21:57.601 --> 00:22:01.039
and the swale area, which was about 0.7 acres.

385
00:22:04.800 --> 00:22:07.414
So, inflow for the level spreader,

386
00:22:07.414 --> 00:22:10.389
that is, inflow through the tributary,

387
00:22:10.389 --> 00:22:14.626
comes from this whole 120 acre watershed that's north of ...

388
00:22:14.626 --> 00:22:16.158
the level spreader.

389
00:22:16.200 --> 00:22:18.259
And if you look at this picture here,

390
00:22:18.259 --> 00:22:20.661
this graphic, the level spreader is shown ...

391
00:22:20.661 --> 00:22:21.759
as a red star again.

392
00:22:22.200 --> 00:22:25.012
So this watershed, as you can see here,

393
00:22:25.012 --> 00:22:28.439
has sort of mixed development on the west side.

394
00:22:28.520 --> 00:22:31.404
There's some residential, then we have sort of a ...

395
00:22:31.404 --> 00:22:33.999
business park type development over here.

396
00:22:34.160 --> 00:22:36.202
And then it also has, oops,

397
00:22:36.202 --> 00:22:40.564
two ponds that also that already are fitted with outlets ...

398
00:22:40.564 --> 00:22:44.833
that help to attenuate some of the stormwater flow from ...

399
00:22:44.833 --> 00:22:46.318
this area already.

400
00:22:48.640 --> 00:22:51.774
So to model, because this watershed is ...

401
00:22:51.774 --> 00:22:55.104
fairly complex, I wanted to use modeling ...

402
00:22:55.104 --> 00:22:58.238
software to generate an inflow for it.

403
00:22:58.280 --> 00:23:01.132
So I use the city of Columbia's heck HMS ...

404
00:23:01.132 --> 00:23:04.697
watershed model, and I just modified it to match ...

405
00:23:04.697 --> 00:23:09.064
the current conditions in the watershed and that the level ...

406
00:23:09.064 --> 00:23:11.559
spreader as closely as possible.

407
00:23:15.120 --> 00:23:16.927
So, as you can see here,

408
00:23:16.927 --> 00:23:22.159
these two charts are time series results from this heck HMS model.

409
00:23:23.040 --> 00:23:25.336
Elevation is shown here in gray,

410
00:23:25.336 --> 00:23:29.079
inflow is blue, and then outflow is this yellow line.

411
00:23:29.640 --> 00:23:33.417
So the reason I showed elevation is because I wanted ...

412
00:23:33.417 --> 00:23:37.106
to compare this modeled inflow to a measurement we ...

413
00:23:37.106 --> 00:23:38.599
got out in the field.

414
00:23:38.680 --> 00:23:41.391
And so one of the measurements we had out in ...

415
00:23:41.391 --> 00:23:44.800
the field was depth inside of the level spreader lip,

416
00:23:44.800 --> 00:23:47.279
and we had that measured every minute.

417
00:23:47.360 --> 00:23:51.326
So I wanted to compare the model to real world data,

418
00:23:51.326 --> 00:23:54.159
and that's why I modeled elevation.

419
00:23:56.200 --> 00:23:59.719
And I have charts that show this elevation compared to ...

420
00:23:59.719 --> 00:24:03.316
the real elevation out of the site towards the end of the ...

421
00:24:03.316 --> 00:24:06.678
slideshow, if you guys would like to see that later.

422
00:24:06.880 --> 00:24:10.000
But for now, the results I wanted to take ...

423
00:24:10.000 --> 00:24:12.080
away from this was inflow.

424
00:24:16.280 --> 00:24:18.630
So, outflow for the level spreader ...

425
00:24:18.630 --> 00:24:21.953
has two main parts, and the first part is the under ...

426
00:24:21.953 --> 00:24:25.438
drain pipe, which you can sort of see the end of here.

427
00:24:27.960 --> 00:24:30.941
The under drain on the diverter box is what allows ...

428
00:24:30.941 --> 00:24:34.359
base flow to continue down that small tributary stream.

429
00:24:35.320 --> 00:24:39.958
And prior to 2019, it was actually an open pvc ...

430
00:24:39.958 --> 00:24:41.838
pipe, but in 2019,

431
00:24:41.838 --> 00:24:43.718
an orifice plate.

432
00:24:43.760 --> 00:24:46.907
This white thing here, was installed at the end to ...

433
00:24:46.907 --> 00:24:49.439
further restrict flow down the stream.

434
00:24:51.400 --> 00:24:54.684
So the outflow for this was calculated as orifice flow for ...

435
00:24:54.684 --> 00:24:57.831
either the perforations in the buried section of pipe,

436
00:24:57.831 --> 00:25:00.568
or for the two inch opening on the orifice plate,

437
00:25:00.568 --> 00:25:02.757
depending on when the storm occurred.

438
00:25:03.760 --> 00:25:05.645
For storm one, the pipe was open,

439
00:25:05.645 --> 00:25:08.717
so flow through the under drain was really dependent ...

440
00:25:08.717 --> 00:25:11.439
on those perforations in the under drain pipe.

441
00:25:11.560 --> 00:25:15.173
And then for storm two, the flow is dependent on this ...

442
00:25:15.173 --> 00:25:19.879
opening in the orifice plate, which makes it a lot smaller of a flow.

443
00:25:20.240 --> 00:25:22.866
But for both storms, outflow from the converter ...

444
00:25:22.866 --> 00:25:25.558
box is a small value that occurs over a much longer ...

445
00:25:25.558 --> 00:25:27.199
time period during the storm.

446
00:25:27.360 --> 00:25:30.867
And this is the flux that, over several days,

447
00:25:30.867 --> 00:25:35.133
completely empties levels for your basin during very ...

448
00:25:35.133 --> 00:25:39.399
extreme events, if water ever were to get high enough.

449
00:25:39.480 --> 00:25:42.739
There's also these stop log structures here that water ...

450
00:25:42.739 --> 00:25:44.439
could potentially overtop.

451
00:25:44.520 --> 00:25:47.970
But this didn't happen in any of the storms we gathered ...

452
00:25:47.970 --> 00:25:50.270
data for, so I didn't include it in my ...

453
00:25:50.270 --> 00:25:51.880
calculation of outflow.

454
00:25:52.400 --> 00:25:54.953
And then the last component is the level lip,

455
00:25:54.953 --> 00:25:56.954
which is this concrete structure,

456
00:25:56.954 --> 00:25:59.438
and it's just rectangular concrete curve.

457
00:25:59.480 --> 00:26:02.989
So to calculate outflow, I use the broad crested ...

458
00:26:02.989 --> 00:26:06.059
equation, the level of overtops with only ...

459
00:26:06.059 --> 00:26:09.655
a small depth of water, which is always less than a ...

460
00:26:09.655 --> 00:26:13.076
couple of inches, but because it's relatively ...

461
00:26:13.076 --> 00:26:15.883
long, it still releases a large volume ...

462
00:26:15.883 --> 00:26:17.637
of water in a short time.

463
00:26:17.800 --> 00:26:20.760
And we'll see that when we look at the final water balance.

464
00:26:24.040 --> 00:26:27.878
To calculate infiltration inside of the level spreader basin ...

465
00:26:27.878 --> 00:26:29.944
and swale, I used the green and AMT ...

466
00:26:29.944 --> 00:26:32.158
equation for ponded infiltration.

467
00:26:32.320 --> 00:26:35.535
And I chose this method because it takes into account ...

468
00:26:35.535 --> 00:26:38.896
the area of ponding as well as the depth of water over the ...

469
00:26:38.896 --> 00:26:39.919
ground surface.

470
00:26:40.080 --> 00:26:43.941
I was able to estimate an area to depth relationship for the ...

471
00:26:43.941 --> 00:26:46.541
level spreader, identify the pressure ...

472
00:26:46.541 --> 00:26:49.614
transducer depth measurements from the site,

473
00:26:49.614 --> 00:26:53.791
other terms that were needed to estimate infiltration related ...

474
00:26:53.791 --> 00:26:55.997
mainly to soil characteristics.

475
00:26:56.440 --> 00:27:00.214
Many of these I was able to find from the NRCS web soil ...

476
00:27:00.214 --> 00:27:02.759
survey, which showed that the soil ...

477
00:27:02.759 --> 00:27:06.358
type near this level spreader is a silt loam type.

478
00:27:06.840 --> 00:27:10.991
The web soil survey provided a really large range of ...

479
00:27:10.991 --> 00:27:13.984
saturated hydraulic conductivity,

480
00:27:13.984 --> 00:27:15.239
or KSAT values.

481
00:27:15.720 --> 00:27:19.713
So I did a sensitivity analysis and confirmed that a more ...

482
00:27:19.713 --> 00:27:23.536
conservative and low value of 0.57 inches per hour was ...

483
00:27:23.536 --> 00:27:25.999
appropriate to use in my analysis.

484
00:27:26.080 --> 00:27:28.920
And I believe this is also correct because the area ...

485
00:27:28.920 --> 00:27:31.692
around the level spreader has been disturbed and ...

486
00:27:31.692 --> 00:27:35.005
compacted by construction of not only forum boulevard but ...

487
00:27:35.005 --> 00:27:36.357
also the hiking trails.

488
00:27:37.120 --> 00:27:40.716
So the end result of all this is that infiltration is the second ...

489
00:27:40.716 --> 00:27:43.759
largest water flux out of the level spreader system.

490
00:27:47.800 --> 00:27:51.363
So the last term the water balance is evapotranspiration,

491
00:27:51.363 --> 00:27:54.708
and this is a combination of evaporation from the water ...

492
00:27:54.708 --> 00:27:57.398
surface and transpiration or plant uptake.

493
00:27:59.040 --> 00:28:03.121
And evapotranspiration was calculated for the area inside ...

494
00:28:03.121 --> 00:28:05.079
of the level spread or basin.

495
00:28:06.640 --> 00:28:09.568
I assume that evapotranspiration from the ...

496
00:28:09.568 --> 00:28:13.229
site would be equal to the maximum potential evacuate ...

497
00:28:13.229 --> 00:28:16.808
that could occur for a reference short grass surface ...

498
00:28:16.808 --> 00:28:18.597
with no modifying factor.

499
00:28:18.800 --> 00:28:22.094
And the reason to have it be equal to the potential of ...

500
00:28:22.094 --> 00:28:25.847
apotranspiration is because for much of the time interval ...

501
00:28:25.847 --> 00:28:28.451
for both storms, the area inside of level ...

502
00:28:28.451 --> 00:28:32.358
spreader and swale was either fully or partially submerged.

503
00:28:33.120 --> 00:28:36.593
The climate station collects all the data we needed to do ...

504
00:28:36.593 --> 00:28:39.918
this calculation over the interval of both storms and ...

505
00:28:39.918 --> 00:28:40.878
the days after.

506
00:28:41.360 --> 00:28:43.868
And one interesting result is that because ...

507
00:28:43.868 --> 00:28:46.794
evapotranspiration is dependent mainly on solar ...

508
00:28:46.794 --> 00:28:49.093
radiation, it varies on a daily cycle as ...

509
00:28:49.093 --> 00:28:51.043
well, and it's a lot lower when the ...

510
00:28:51.043 --> 00:28:52.157
weather is cloudy.

511
00:28:52.440 --> 00:28:54.404
But on the scale of several days,

512
00:28:54.404 --> 00:28:56.514
as the level spreader is emptying,

513
00:28:56.514 --> 00:28:59.424
you can see that evapotranspiration is not very ...

514
00:28:59.424 --> 00:29:02.916
significant compared to the other fluxes out of the level ...

515
00:29:02.916 --> 00:29:05.244
spreader, but over the scale of a whole ...

516
00:29:05.244 --> 00:29:07.863
growing season, you can see that it would be ...

517
00:29:07.863 --> 00:29:11.355
pretty significant and be a pretty large volume of water.

518
00:29:15.160 --> 00:29:18.200
So this is the final water balance for storm one.

519
00:29:18.320 --> 00:29:23.000
On the x axis we have time for five days and twelve hour intervals.

520
00:29:23.280 --> 00:29:27.113
The y axis shows volume of water with inputs shown as ...

521
00:29:27.113 --> 00:29:30.679
being positive and outflows shown as negative.

522
00:29:31.640 --> 00:29:37.920
So in the data here, blue is inflow from the upper watershed.

523
00:29:38.080 --> 00:29:41.225
Black is precipitation, gray is outflow,

524
00:29:41.225 --> 00:29:44.011
yellow is infiltration, and green is ...

525
00:29:44.011 --> 00:29:45.718
evapotranspiration.

526
00:29:45.800 --> 00:29:49.200
But it's really small, and so it's hard to see in this graph.

527
00:29:50.640 --> 00:29:53.627
And on the left here, there are some total volume ...

528
00:29:53.627 --> 00:29:56.988
numbers for each flux in and out of the level spreader,

529
00:29:56.988 --> 00:29:59.079
and all of these are in cubic feet.

530
00:29:59.720 --> 00:30:02.028
As you can see, outflow from the diverter box ...

531
00:30:02.028 --> 00:30:05.023
and level spreader was still the largest portion of water ...

532
00:30:05.023 --> 00:30:05.959
leaving the site.

533
00:30:06.440 --> 00:30:09.646
And at first glance, it doesn't really look like any ...

534
00:30:09.646 --> 00:30:11.957
storm flow is being attenuated here,

535
00:30:11.957 --> 00:30:14.119
because you can see this big spike.

536
00:30:14.240 --> 00:30:16.447
But actually, this is a level spreader ...

537
00:30:16.447 --> 00:30:18.447
working the way it was supposed to,

538
00:30:18.447 --> 00:30:21.620
because all of this large volume of outflow is actually ...

539
00:30:21.620 --> 00:30:23.758
leaving over the level spreader lip.

540
00:30:23.880 --> 00:30:27.627
So it's being redirected out of the small tributary and ...

541
00:30:27.627 --> 00:30:30.559
spread out over that flat floodplain area.

542
00:30:32.440 --> 00:30:37.320
So this is water being successfully redirected.

543
00:30:37.640 --> 00:30:41.135
So then this much smaller and longer part of outflow is ...

544
00:30:41.135 --> 00:30:44.319
actually that diverter box under drain outflow.

545
00:30:44.440 --> 00:30:48.143
And this is the only outflow that is actually allowed to ...

546
00:30:48.143 --> 00:30:50.719
continue down the tributary channel.

547
00:30:52.240 --> 00:30:54.629
I also want to point out infiltration again,

548
00:30:54.629 --> 00:30:56.759
as compared to the under drain outflow.

549
00:30:56.920 --> 00:31:00.346
Infiltration continues for as long as there is any water ...

550
00:31:00.346 --> 00:31:02.387
retained in the global spreader,

551
00:31:02.387 --> 00:31:05.667
and it's dependent on depth, which is why it follows so ...

552
00:31:05.667 --> 00:31:07.198
closely to this outflow.

553
00:31:11.680 --> 00:31:14.440
So this is the water balance for storm two.

554
00:31:21.960 --> 00:31:24.440
Yep, this is the water balance for storm two.

555
00:31:24.600 --> 00:31:26.925
This graph is set up the same as storm one,

556
00:31:26.925 --> 00:31:29.524
but in this case, the time interval is ten days ...

557
00:31:29.524 --> 00:31:31.918
instead of five, like the previous storm.

558
00:31:35.160 --> 00:31:39.244
So we see the same pattern in precipitation and inflow ...

559
00:31:39.244 --> 00:31:43.964
with the two rainfalls that we saw in the precipitation slide,

560
00:31:43.964 --> 00:31:47.140
as in storm one, you can see outflow broken ...

561
00:31:47.140 --> 00:31:49.318
out to these two components.

562
00:31:49.440 --> 00:31:52.759
So the level spreader is sort of this large spike here,

563
00:31:52.759 --> 00:31:55.783
and then the diverter box under drain is this much ...

564
00:31:55.783 --> 00:31:57.479
smaller and slimmer piece.

565
00:31:58.440 --> 00:32:01.900
So one interesting result that we see for this storm,

566
00:32:01.900 --> 00:32:04.888
but not the last one, is that there's no second ...

567
00:32:04.888 --> 00:32:07.798
large outflow of water for the second storm.

568
00:32:09.560 --> 00:32:13.438
So this could be just sort of an error in how the inflow was ...

569
00:32:13.438 --> 00:32:16.078
modeled, but it can also be attributed ...

570
00:32:16.078 --> 00:32:19.791
to water death inside of the level spreader during and ...

571
00:32:19.791 --> 00:32:21.358
after the second peak.

572
00:32:21.920 --> 00:32:25.280
The pressure transducers on site show that the water level ...

573
00:32:25.280 --> 00:32:28.091
did not rise enough to overtop the level spreader ...

574
00:32:28.091 --> 00:32:31.313
during the second rainfall, so there really wouldn't be ...

575
00:32:31.313 --> 00:32:34.878
another large peak in outflow like there was for the first one.

576
00:32:35.480 --> 00:32:38.709
The under drain outfall is also restricted so much for the ...

577
00:32:38.709 --> 00:32:41.399
storm that it cannot increase very much either.

578
00:32:41.600 --> 00:32:45.078
So more of the water has to leave through infiltration and ...

579
00:32:45.078 --> 00:32:46.599
tobacco transpiration.

580
00:32:48.200 --> 00:32:52.999
Infiltration is also a larger portion of the water leaving ...

581
00:32:52.999 --> 00:32:55.839
the level spreader for this storm.

582
00:33:00.200 --> 00:33:02.880
So some conclusions of the water balance.

583
00:33:03.160 --> 00:33:06.313
The results show that the level spreader increases ...

584
00:33:06.313 --> 00:33:10.053
infiltration into the soil inside the level spreader basin,

585
00:33:10.053 --> 00:33:11.519
as it was designed to do.

586
00:33:11.680 --> 00:33:14.880
And this is mainly due to the ponding of water in this area.

587
00:33:15.080 --> 00:33:17.929
So when water is retained behind the level spreader ...

588
00:33:17.929 --> 00:33:20.711
and the diverter box, it's in contact with a fairly ...

589
00:33:20.711 --> 00:33:22.764
large area of soil for multiple days,

590
00:33:22.764 --> 00:33:25.878
and this gives the water a lot more time to inflammation.

591
00:33:27.000 --> 00:33:29.032
Also, while the water is ponded,

592
00:33:29.032 --> 00:33:31.290
that depth acts as a hydraulic head,

593
00:33:31.290 --> 00:33:33.999
which pushes more water down into the soil.

594
00:33:34.880 --> 00:33:37.806
The level spreader also allows for a larger volume of ...

595
00:33:37.806 --> 00:33:40.200
water to be in contact with the soil at once.

596
00:33:40.640 --> 00:33:43.783
If there wasn't a basin to retain and hold water in,

597
00:33:43.783 --> 00:33:47.226
the maximum volume of water that would reach the soil in ...

598
00:33:47.226 --> 00:33:50.145
this area would be from direct precipitation,

599
00:33:50.145 --> 00:33:53.438
and infiltration would be a fraction of that amount.

600
00:33:54.400 --> 00:33:57.213
So in these two charts, we can see a graph of ...

601
00:33:57.213 --> 00:34:00.187
cumulative precipitation for both storms,

602
00:34:00.187 --> 00:34:02.518
and that's shown as the black line.

603
00:34:03.800 --> 00:34:06.924
Because the basin and swale area of the level spreader ...

604
00:34:06.924 --> 00:34:09.423
also hold inflow from the upper watershed,

605
00:34:09.423 --> 00:34:12.825
the fraction of water infiltrated now translates to a much ...

606
00:34:12.825 --> 00:34:15.324
larger volume, and this is shown as the blue ...

607
00:34:15.324 --> 00:34:17.823
line on these charts, which corresponds to ...

608
00:34:17.823 --> 00:34:20.878
cumulative infiltration throughout the whole time ...

609
00:34:20.878 --> 00:34:22.197
interval of the storm.

610
00:34:23.360 --> 00:34:26.544
So there's also more opportunity for infiltration into ...

611
00:34:26.544 --> 00:34:29.050
the floodplain area downstream of the level ...

612
00:34:29.050 --> 00:34:30.879
spreader when it's over topped.

613
00:34:31.080 --> 00:34:34.166
This wasn't measured during this study since we focused ...

614
00:34:34.166 --> 00:34:36.267
on the area inside the level spreader,

615
00:34:36.267 --> 00:34:38.959
but it could potentially be significant as well.

616
00:34:43.120 --> 00:34:46.364
The level spreader also is successful at attenuating and ...

617
00:34:46.364 --> 00:34:48.999
decreasing peak flows in the small tributary.

618
00:34:49.360 --> 00:34:52.123
This is mainly a function of how the system works to ...

619
00:34:52.123 --> 00:34:55.215
control flow during storm events and retains water over ...

620
00:34:55.215 --> 00:34:56.399
a longer time period.

621
00:34:57.320 --> 00:35:00.220
Peak flows during very large storms are now sent to the ...

622
00:35:00.220 --> 00:35:02.282
level spreader, lift over top onto the ...

623
00:35:02.282 --> 00:35:05.376
floodplain instead of being allowed to continue down the ...

624
00:35:05.376 --> 00:35:07.438
tributary and out into Hinkson Creek.

625
00:35:07.640 --> 00:35:10.704
For smaller storms, the water is mainly retained in ...

626
00:35:10.704 --> 00:35:14.125
the basin and swale and either infiltrated or released in ...

627
00:35:14.125 --> 00:35:17.118
a controlled and slowed manner by the under drain.

628
00:35:17.560 --> 00:35:20.531
So in these charts, you can see for both storm ...

629
00:35:20.531 --> 00:35:23.903
one and storm two, flow rate in the tributary is not ...

630
00:35:23.903 --> 00:35:26.713
only decreased, but spread out over a much ...

631
00:35:26.713 --> 00:35:28.238
longer time interval.

632
00:35:34.680 --> 00:35:35.520
Sorry.

633
00:35:38.080 --> 00:35:39.800
So, okay, yeah.

634
00:35:39.920 --> 00:35:43.054
One important note that I wanted to make for this is ...

635
00:35:43.054 --> 00:35:44.919
that this compares flow rate.

636
00:35:45.000 --> 00:35:48.123
This analysis compares flow rate in the tributary at the ...

637
00:35:48.123 --> 00:35:51.445
location of the level spreader, but not downstream or where ...

638
00:35:51.445 --> 00:35:53.438
the tributary meets Hinkson Creek.

639
00:35:53.640 --> 00:35:57.101
And one important thing that may happen is that flow is ...

640
00:35:57.101 --> 00:36:00.793
likely to enter the tributary as you move downstream from ...

641
00:36:00.793 --> 00:36:04.100
the land adjacent to it, including some of that peak ...

642
00:36:04.100 --> 00:36:06.638
flow that overtops the level spreader.

643
00:36:06.680 --> 00:36:10.836
But this extra water will likely be attenuated not only from ...

644
00:36:10.836 --> 00:36:13.246
going through the level spreader,

645
00:36:13.246 --> 00:36:16.238
but also from moving over the land surface.

646
00:36:19.840 --> 00:36:24.554
So that is the end of the first part of the presentation on ...

647
00:36:24.554 --> 00:36:26.159
the water balance.

648
00:36:27.320 --> 00:36:29.897
Does anyone have any questions on the first part of ...

649
00:36:29.897 --> 00:36:30.879
the presentation?

650
00:36:36.360 --> 00:36:37.432
Hi, this is John Holmes,

651
00:36:37.432 --> 00:36:38.879
one of the science team members.

652
00:36:38.960 --> 00:36:41.289
I was curious, it all made sense,

653
00:36:41.289 --> 00:36:43.359
it was a great presentation.

654
00:36:44.040 --> 00:36:48.120
But how far below the level spreader do you see the flow ...

655
00:36:48.120 --> 00:36:53.560
start to reconcentrate into channels flow as opposed to overland flow?

656
00:36:54.680 --> 00:36:57.240
That's a good question for this study.

657
00:36:57.280 --> 00:37:00.423
We didn't focus too much on the floodplain outside of the ...

658
00:37:00.423 --> 00:37:01.359
level spreader.

659
00:37:01.480 --> 00:37:05.661
We were more looking at this from a water quantity point of ...

660
00:37:05.661 --> 00:37:09.667
view with regard to how much leaves the level spreader,

661
00:37:09.667 --> 00:37:14.719
either as overflow over the level lip or out through the diverter box.

662
00:37:15.640 --> 00:37:18.973
Some guidelines from literature say that usually you ...

663
00:37:18.973 --> 00:37:22.084
want to keep the distance from the level lip to your ...

664
00:37:22.084 --> 00:37:23.639
receiving body of water.

665
00:37:23.720 --> 00:37:27.480
So that would be a stream like Hinkson Creek, fairly short.

666
00:37:27.600 --> 00:37:31.489
So one of the studies indicated that under 100ft ...

667
00:37:31.489 --> 00:37:34.406
would be sort of the ideal distance,

668
00:37:34.406 --> 00:37:38.198
but we didn't measure that for this study area.

669
00:37:39.400 --> 00:37:40.320
Thank you.

670
00:37:50.040 --> 00:37:52.680
Can you hear me, Lou?

671
00:37:52.800 --> 00:37:53.500
Yes, yes,

672
00:37:53.500 --> 00:37:54.639
you may want to.

673
00:37:54.760 --> 00:37:57.280
Nice presentation.

674
00:37:57.640 --> 00:38:03.040
I've got a nasty echo here, but I'll try to speak through it.

675
00:38:03.320 --> 00:38:06.640
So I had a follow up on the question that John asked.

676
00:38:06.960 --> 00:38:10.908
So the infiltration that you measured was in the level ...

677
00:38:10.908 --> 00:38:14.330
spreader itself, and the assumption is it went ...

678
00:38:14.330 --> 00:38:18.278
over the level spreader, actually also infiltrated.

679
00:38:18.440 --> 00:38:19.520
Is that correct?

680
00:38:21.880 --> 00:38:24.116
Again, we didn't measure infiltration ...

681
00:38:24.116 --> 00:38:27.504
outside of the level spreader, but the assumption is that at ...

682
00:38:27.504 --> 00:38:30.418
least some of that overland flow would infiltrate,

683
00:38:30.418 --> 00:38:31.638
but not sure how much.

684
00:38:31.720 --> 00:38:34.720
That would be really dependent on soil type.

685
00:38:35.200 --> 00:38:37.520
Okay, thanks.

686
00:38:37.680 --> 00:38:38.800
And then the other question.

687
00:38:38.880 --> 00:38:41.880
These storms, what sort of return intervals did they have?

688
00:38:43.680 --> 00:38:47.600
I didn't actually measure return interval for them.

689
00:38:47.680 --> 00:38:50.378
I just took both of them having about two inch ...

690
00:38:50.378 --> 00:38:52.858
rainfall, because that's what it took to ...

691
00:38:52.858 --> 00:38:55.265
actually activate the level spreader.

692
00:38:55.265 --> 00:38:56.359
Lipid, yemenite.

693
00:38:58.640 --> 00:39:00.400
Okay, so where do they are?

694
00:39:00.560 --> 00:39:03.748
Like on a continuum of small to big storms,

695
00:39:03.748 --> 00:39:08.759
fairly large storms, especially for a single rainfall like that.

696
00:39:09.760 --> 00:39:11.000
Great.  Thank you.

697
00:39:37.120 --> 00:39:40.360
So does anyone else have any questions about the water balance?

698
00:39:46.000 --> 00:39:49.161
I could just say to sort of help answer Rob's question,

699
00:39:49.161 --> 00:39:51.479
the rainfall yesterday was two inches.

700
00:39:51.640 --> 00:39:54.400
It was like some of them might have been like that storm.

701
00:39:55.120 --> 00:39:57.160
Okay.  Okay.

702
00:39:57.280 --> 00:39:59.953
Although I guess yours were a little more spread out than ...

703
00:39:59.953 --> 00:40:00.919
that, is that right?

704
00:40:01.880 --> 00:40:02.920
Yes and no.

705
00:40:03.000 --> 00:40:05.648
For the first storm it happened over about 8 ...

706
00:40:05.648 --> 00:40:07.486
hours, and then for the second ...

707
00:40:07.486 --> 00:40:09.619
storm, that first peak of rainfall ...

708
00:40:09.619 --> 00:40:11.678
happened over a few hours as well.

709
00:40:11.840 --> 00:40:13.520
Okay, thank you.

710
00:40:15.400 --> 00:40:17.323
Well, if there's no other questions ...

711
00:40:17.323 --> 00:40:19.823
on the water balance, I'll move on to the second ...

712
00:40:19.823 --> 00:40:22.836
part of my presentation, which is site selection for new ...

713
00:40:22.836 --> 00:40:23.797
level spreaders.

714
00:40:24.000 --> 00:40:28.126
And this is focusing on Boone county and also the Hanson ...

715
00:40:28.126 --> 00:40:32.879
Creek watershed as sort of the area in which this would be valid.

716
00:40:35.160 --> 00:40:39.337
So when I looked at site selection criteria for new level ...

717
00:40:39.337 --> 00:40:43.159
spreaders, I focused on two of the main components.

718
00:40:43.320 --> 00:40:47.240
And the first is what area a level spreader would be located in.

719
00:40:47.280 --> 00:40:50.640
So what type of an area would you want downstream ...

720
00:40:50.640 --> 00:40:52.320
of a new level spreader?

721
00:40:53.120 --> 00:40:56.325
Other studies that have been done on level spreaders,

722
00:40:56.325 --> 00:40:59.103
like I mentioned earlier, would be 100ft to the ...

723
00:40:59.103 --> 00:41:00.599
receiving body of water.

724
00:41:01.240 --> 00:41:04.573
Other studies also focus on characteristics that this area ...

725
00:41:04.573 --> 00:41:07.639
should have that will allow the level spreader to work.

726
00:41:07.800 --> 00:41:11.045
So some of the main criteria that I found were that the ...

727
00:41:11.045 --> 00:41:13.479
slope of the land should be less than 8%.

728
00:41:14.320 --> 00:41:16.276
Ideally, the lower the slope the ...

729
00:41:16.276 --> 00:41:19.319
better, and the tree cover should be low to medium.

730
00:41:19.440 --> 00:41:22.634
And both of these characteristics are important ...

731
00:41:22.634 --> 00:41:26.763
to prevent rechantalization of the water after it over tops the ...

732
00:41:26.763 --> 00:41:29.879
level spreader and as it's flowing away from it.

733
00:41:30.440 --> 00:41:34.120
So at forum nature area, both of these criteria are met.

734
00:41:34.280 --> 00:41:37.346
While there's an effort to reestablish trees in the flood ...

735
00:41:37.346 --> 00:41:39.070
plain, there's enough distance ...

736
00:41:39.070 --> 00:41:41.944
between them and they're small enough at this stage to ...

737
00:41:41.944 --> 00:41:42.838
where it's fine.

738
00:41:43.200 --> 00:41:45.563
The ground is also flat or very nearly flat,

739
00:41:45.563 --> 00:41:49.239
and this keeps water slowed down as it moves away from the level lip.

740
00:41:50.320 --> 00:41:53.077
So one way that formed nature area is this level ...

741
00:41:53.077 --> 00:41:56.471
spreader is a special case, is that it accepts water from a ...

742
00:41:56.471 --> 00:41:58.238
relatively large watershed.

743
00:41:58.800 --> 00:42:02.076
So usually level spreaders are used on much smaller ...

744
00:42:02.076 --> 00:42:06.038
areas like single parking lots, watersheds under five acres,

745
00:42:06.038 --> 00:42:07.638
or small areas like that.

746
00:42:07.680 --> 00:42:11.120
And usually the level spreader itself is smaller in ...

747
00:42:11.120 --> 00:42:12.640
size and much shorter.

748
00:42:12.840 --> 00:42:14.960
This local spreader works because it's used in ...

749
00:42:14.960 --> 00:42:17.679
combination with other stormwater management practices.

750
00:42:18.480 --> 00:42:22.053
So in the upper watershed, those two ponds already work ...

751
00:42:22.053 --> 00:42:25.159
to attenuate some stormwater at their outlets.

752
00:42:25.280 --> 00:42:28.087
And the large basin behind the level spreader also ...

753
00:42:28.087 --> 00:42:30.559
functions to retain a large volume of water.

754
00:42:31.120 --> 00:42:34.525
The second component in site selection is that there has ...

755
00:42:34.525 --> 00:42:36.553
to be a need for flow attenuation,

756
00:42:36.553 --> 00:42:39.958
so you have to have a source of concentrated stormwater.

757
00:42:40.520 --> 00:42:44.375
So this could come from the outlet of a retention pond or a ...

758
00:42:44.375 --> 00:42:48.230
small storm drain system or just a paved area that runoff ...

759
00:42:48.230 --> 00:42:51.839
is concentrated in a gutter before it flows off site.

760
00:42:55.040 --> 00:42:57.781
I wanted to develop a tool that could be used by the ...

761
00:42:57.781 --> 00:43:00.255
CAM partners to find locations for new level ...

762
00:43:00.255 --> 00:43:02.996
spreaders throughout the county and the Hinkson ...

763
00:43:02.996 --> 00:43:03.998
Creek watershed.

764
00:43:04.160 --> 00:43:07.458
And so I decided that a GIS based suitability analysis ...

765
00:43:07.458 --> 00:43:10.243
would be an appropriate method to combine the ...

766
00:43:10.243 --> 00:43:12.515
multiple data sets corresponding to ...

767
00:43:12.515 --> 00:43:15.519
characteristics of ideal level spreader sites.

768
00:43:16.000 --> 00:43:18.163
To start developing the GIS tool,

769
00:43:18.163 --> 00:43:21.716
I found four data sets that either established a source ...

770
00:43:21.716 --> 00:43:25.424
for concentrated stormwater flow or an area that could be ...

771
00:43:25.424 --> 00:43:27.278
used to attenuate the flows.

772
00:43:27.600 --> 00:43:29.653
The data I used here was statewide,

773
00:43:29.653 --> 00:43:32.627
but I trimmed it down to a more manageable size that ...

774
00:43:32.627 --> 00:43:36.238
my computer could process that included all of Boone county.

775
00:43:37.480 --> 00:43:40.381
So some areas that would have concentrated ...

776
00:43:40.381 --> 00:43:44.007
stormwater in a large enough volume to be a problem are ...

777
00:43:44.007 --> 00:43:45.941
main roads such as highways,

778
00:43:45.941 --> 00:43:49.890
areas with higher percentage of impurpius or paved cover,

779
00:43:49.890 --> 00:43:53.678
or locations near known stormwater outflows outfalls.

780
00:43:54.000 --> 00:43:57.433
Areas that might be suitable for the site of a level spreader ...

781
00:43:57.433 --> 00:44:00.591
have a lower percentage of impurpia surface and a low to ...

782
00:44:00.591 --> 00:44:02.239
medium amount of tree cover.

783
00:44:03.200 --> 00:44:06.368
So the goal of combining this data would be to find ...

784
00:44:06.368 --> 00:44:10.077
locations where these two types of areas intersect or are ...

785
00:44:10.077 --> 00:44:11.158
close together.

786
00:44:11.480 --> 00:44:13.298
So, a successful use of the map ...

787
00:44:13.298 --> 00:44:16.498
tool would show places similar to the level spreader ...

788
00:44:16.498 --> 00:44:19.625
site at form nature area where there are impervious ...

789
00:44:19.625 --> 00:44:22.461
surfaces nearby but not dense development and ...

790
00:44:22.461 --> 00:44:23.479
some tree cover.

791
00:44:23.560 --> 00:44:25.000
Potentially, but not so much.

792
00:44:25.040 --> 00:44:27.440
The area is too densely forested.

793
00:44:31.920 --> 00:44:35.312
So the first step in my suitability analysis was that I ...

794
00:44:35.312 --> 00:44:38.177
took each data set and divided them up into ten ...

795
00:44:38.177 --> 00:44:42.399
classes and assigned each class something called a utility value.

796
00:44:43.000 --> 00:44:46.652
So the classes are based on either percentage land cover ...

797
00:44:46.652 --> 00:44:50.071
for the percent trees and a percent impervious data,

798
00:44:50.071 --> 00:44:53.879
or distance to a feature for the outfalls and the main rows.

799
00:44:54.560 --> 00:44:58.289
Once all the data was broken up into the individual classes,

800
00:44:58.289 --> 00:45:01.720
each class was assigned a utility value from one to ten,

801
00:45:01.720 --> 00:45:05.001
and what that means is that a ten corresponds to a high ...

802
00:45:05.001 --> 00:45:08.879
suitability for a level spreader site and one corresponds to a ...

803
00:45:08.879 --> 00:45:09.997
low suitability.

804
00:45:11.080 --> 00:45:13.807
So for distance to the main roads and outfalls,

805
00:45:13.807 --> 00:45:17.373
the highest utility values were given to areas close to these ...

806
00:45:17.373 --> 00:45:19.750
features, with the numbers tapering off ...

807
00:45:19.750 --> 00:45:21.358
as the distance increases.

808
00:45:21.680 --> 00:45:25.097
For percent trees, the highest utility values were ...

809
00:45:25.097 --> 00:45:27.004
given to areas with under 30%

810
00:45:27.004 --> 00:45:30.580
tree cover and the lowest were given to areas with over ...

811
00:45:30.580 --> 00:45:31.613
70% tree cover,

812
00:45:31.613 --> 00:45:34.076
and finally, for percent impervious ...

813
00:45:34.076 --> 00:45:36.857
surface, the highest utility values were ...

814
00:45:36.857 --> 00:45:39.558
for areas between 20 and 50% impervious.

815
00:45:40.480 --> 00:45:43.138
In future iterations of the map tool,

816
00:45:43.138 --> 00:45:46.225
these factors should probably be changed,

817
00:45:46.225 --> 00:45:49.998
and they can be changed to better reflect ideal level ...

818
00:45:49.998 --> 00:45:51.198
spreader sites.

819
00:45:51.240 --> 00:45:52.441
So, for example,

820
00:45:52.441 --> 00:45:56.646
the highest utility values in percent impervious could be ...

821
00:45:56.646 --> 00:45:59.478
given to areas with lower percentages.

822
00:46:01.320 --> 00:46:04.015
So once utility values were assigned,

823
00:46:04.015 --> 00:46:07.721
they were added for each map unit using this equation ...

824
00:46:07.721 --> 00:46:09.742
here, each utility value was ...

825
00:46:09.742 --> 00:46:12.521
multiplied by a corresponding factor,

826
00:46:12.521 --> 00:46:15.637
and all of the factors were a fraction of one.

827
00:46:15.840 --> 00:46:19.098
They're based on how important each characteristic ...

828
00:46:19.098 --> 00:46:21.319
is to the overall site suitability.

829
00:46:21.520 --> 00:46:25.033
So percent impervious is slightly more important than ...

830
00:46:25.033 --> 00:46:28.164
percent trees because it affects both source and ...

831
00:46:28.164 --> 00:46:31.754
attenuation of stormwater, but both are more important ...

832
00:46:31.754 --> 00:46:34.198
than proximity to roads and outfalls.

833
00:46:37.240 --> 00:46:40.688
The preliminary suitability analysis results are shown on ...

834
00:46:40.688 --> 00:46:44.067
the right where light areas are highly suitable and darker ...

835
00:46:44.067 --> 00:46:45.998
areas are shown as less suitable.

836
00:46:46.160 --> 00:46:49.719
The locations that are shown that show up brightest on the ...

837
00:46:49.719 --> 00:46:52.981
map tend to be residential areas with medium density ...

838
00:46:52.981 --> 00:46:56.169
like these ones on the west side of Columbia and some ...

839
00:46:56.169 --> 00:46:58.838
commercial developments like these ones.

840
00:46:59.840 --> 00:47:03.462
So these areas will usually have light to medium tree ...

841
00:47:03.462 --> 00:47:07.249
cover in the unpaved areas and enough impervious cover ...

842
00:47:07.249 --> 00:47:11.036
from like driveways and buildings and small streets to ...

843
00:47:11.036 --> 00:47:14.658
generate excess stormwater that would be in need of a ...

844
00:47:14.658 --> 00:47:18.198
tiny locations in close proximity to the main roads ...

845
00:47:18.198 --> 00:47:22.397
and highways are also shown to be more suitable than average.

846
00:47:22.560 --> 00:47:24.823
In this case, the road serves as the source ...

847
00:47:24.823 --> 00:47:28.120
of concentrated stormwater, and the area directly adjacent ...

848
00:47:28.120 --> 00:47:31.159
to the road is usually kept a little bit clearer of trees.

849
00:47:32.240 --> 00:47:36.027
Proximity to main highways and npdes permitted outfalls ...

850
00:47:36.027 --> 00:47:38.394
were also used to generate this map,

851
00:47:38.394 --> 00:47:41.550
but because they ranked with lower importance,

852
00:47:41.550 --> 00:47:44.943
they show up a lot fainter than the percentage trees ...

853
00:47:44.943 --> 00:47:46.757
and impervious cover data.

854
00:47:50.440 --> 00:47:52.987
After the suitability analysis was ran,

855
00:47:52.987 --> 00:47:56.359
I selected two locations to field verify the results.

856
00:47:56.560 --> 00:47:59.813
So the first location was in a residential neighborhood,

857
00:47:59.813 --> 00:48:02.388
and I chose it because it showed up on the map as ...

858
00:48:02.388 --> 00:48:05.438
having very high suitability, which you can see here.

859
00:48:05.480 --> 00:48:07.760
It shows up very brightly.

860
00:48:08.080 --> 00:48:10.869
This neighborhood was located in west Columbia ...

861
00:48:10.869 --> 00:48:13.589
near over near Scott Boulevard and Chapel Hill ...

862
00:48:13.589 --> 00:48:16.239
Road and within the Hinkson Creek watershed.

863
00:48:16.560 --> 00:48:20.108
This area has a good mix of impervious surface and open ...

864
00:48:20.108 --> 00:48:22.158
areas, but as you can see in this ...

865
00:48:22.158 --> 00:48:24.444
photo, most of the open areas are in ...

866
00:48:24.444 --> 00:48:28.386
private yards and in addition, the slope was pretty steep in ...

867
00:48:28.386 --> 00:48:30.278
areas where it wasn't paved.

868
00:48:30.480 --> 00:48:34.123
So this shows that more data is needed for the map tool,

869
00:48:34.123 --> 00:48:37.119
especially the layer that shows land slope.

870
00:48:38.320 --> 00:48:41.982
So the second location I chose because it's similar to ...

871
00:48:41.982 --> 00:48:43.039
the forum site.

872
00:48:43.360 --> 00:48:45.504
It's Hinkson Field, which is just east of ...

873
00:48:45.504 --> 00:48:47.894
Providence Road and south of the Hearn center,

874
00:48:47.894 --> 00:48:50.038
and some of the other missoul facilities.

875
00:48:51.440 --> 00:48:54.483
Life form nature area the site's a flood plain,

876
00:48:54.483 --> 00:48:56.199
so it's very open and flat.

877
00:48:56.480 --> 00:48:59.326
On the map you can see that doesn't show up all that ...

878
00:48:59.326 --> 00:49:01.547
brightly, not as brightly as the first ...

879
00:49:01.547 --> 00:49:03.768
location, and this is because of a lack ...

880
00:49:03.768 --> 00:49:06.198
of impervious surface close to this area.

881
00:49:06.280 --> 00:49:09.265
As you can see here, there's like a parking lot,

882
00:49:09.265 --> 00:49:12.479
but there's not a lot of other impervious surface.

883
00:49:14.160 --> 00:49:17.596
So if this site were to be used for a level spreader sometime ...

884
00:49:17.596 --> 00:49:20.331
in the future, stormwater would likely either ...

885
00:49:20.331 --> 00:49:22.925
have to be piped or directed in from off site,

886
00:49:22.925 --> 00:49:24.678
and that's one disadvantage.

887
00:49:24.720 --> 00:49:26.723
However, as a downstream area for a ...

888
00:49:26.723 --> 00:49:29.348
large level spreader, Hanson fields a better ...

889
00:49:29.348 --> 00:49:31.558
candidate than the residential area.

890
00:49:34.640 --> 00:49:37.257
In future iterations of the GIS tool,

891
00:49:37.257 --> 00:49:40.128
more layers should definitely be added,

892
00:49:40.128 --> 00:49:42.999
especially for land slope and soil type.

893
00:49:43.160 --> 00:49:45.701
Soil type is important because only some types are ...

894
00:49:45.701 --> 00:49:48.606
conducive to infiltration, and that's one of the goals of ...

895
00:49:48.606 --> 00:49:50.119
installing a level spreader.

896
00:49:50.760 --> 00:49:53.849
Slope is also a very important criteria for the downstream ...

897
00:49:53.849 --> 00:49:55.236
area, and you can't always ...

898
00:49:55.236 --> 00:49:58.199
approximate made it with other factors like tree cover.

899
00:50:00.000 --> 00:50:03.263
It may also be useful to separate the analysis into two ...

900
00:50:03.263 --> 00:50:05.076
parts, with the first being an ...

901
00:50:05.076 --> 00:50:08.049
investigation of your concentrated stormwater ...

902
00:50:08.049 --> 00:50:10.805
sources and the second being downstream area ...

903
00:50:10.805 --> 00:50:13.198
suitability, since these will usually ...

904
00:50:13.198 --> 00:50:16.244
require different characteristics and usually a ...

905
00:50:16.244 --> 00:50:18.637
single site wouldn't have both of them.

906
00:50:19.320 --> 00:50:23.204
So another strategy would be to set the criteria for the ...

907
00:50:23.204 --> 00:50:27.510
suitability analysis in such a way that it picks up potential ...

908
00:50:27.510 --> 00:50:30.634
downstream areas as being highly suitable,

909
00:50:30.634 --> 00:50:35.278
but potential stormwater source areas as being very unsuitable.

910
00:50:35.440 --> 00:50:39.046
And then you could look at the resulting suitability map ...

911
00:50:39.046 --> 00:50:42.959
for locations where these two areas meet in close proximity.

912
00:50:44.000 --> 00:50:47.984
So on this slide I wanted to include forum nature area as ...

913
00:50:47.984 --> 00:50:52.141
one last example of how the results of the GIS tool look for ...

914
00:50:52.141 --> 00:50:57.078
location that is known to meet the criteria for level spreader site.

915
00:50:57.280 --> 00:50:59.955
So you can see that similar to Hinkson Field,

916
00:50:59.955 --> 00:51:02.774
the downstream area shows up as gray with only a ...

917
00:51:02.774 --> 00:51:05.593
medium suitability, while the area that would ...

918
00:51:05.593 --> 00:51:08.918
form the level spreader basin has higher suitability.

919
00:51:09.040 --> 00:51:12.499
And this is due to the trails and forum boulevard in the ...

920
00:51:12.499 --> 00:51:13.959
parking lot over here.

921
00:51:16.920 --> 00:51:19.848
So some final conclusions and recommendations in ...

922
00:51:19.848 --> 00:51:22.149
conclusion, the Forb nature area level ...

923
00:51:22.149 --> 00:51:25.147
spreader is successful as a stormwater management ...

924
00:51:25.147 --> 00:51:27.518
practice, and it meets its design goals.

925
00:51:27.680 --> 00:51:30.641
So it controls outflow in the small tributary,

926
00:51:30.641 --> 00:51:34.134
mainly by retaining a large volume of water in the basin ...

927
00:51:34.134 --> 00:51:36.791
and swale, and having controlled outflow ...

928
00:51:36.791 --> 00:51:38.157
at that diverter box.

929
00:51:38.240 --> 00:51:41.685
The level spreader also increases infiltration into the ...

930
00:51:41.685 --> 00:51:44.628
floodplain by allowing stormwater more time in a ...

931
00:51:44.628 --> 00:51:46.279
larger area to infiltrate.

932
00:51:46.800 --> 00:51:50.261
The GIS map tool is also able to locate sites for new level ...

933
00:51:50.261 --> 00:51:52.470
spreaders, but improvements to the ...

934
00:51:52.470 --> 00:51:54.458
analysis, including more data,

935
00:51:54.458 --> 00:51:57.182
especially the landsload and the soil type,

936
00:51:57.182 --> 00:51:59.686
and more refined factors of importance,

937
00:51:59.686 --> 00:52:02.116
are needed, and any results will always ...

938
00:52:02.116 --> 00:52:03.957
require field verification.

939
00:52:05.280 --> 00:52:07.594
One last general recommendation I had,

940
00:52:07.594 --> 00:52:10.680
based on experiences collecting data from the site,

941
00:52:10.680 --> 00:52:13.976
is that the public was really curious about the research ...

942
00:52:13.976 --> 00:52:16.290
we were doing here and about stormwater ...

943
00:52:16.290 --> 00:52:19.516
management in general, and the level spreader itself.

944
00:52:19.960 --> 00:52:23.235
And I think that this site, as well as others that are ...

945
00:52:23.235 --> 00:52:25.444
located in public parks and areas,

946
00:52:25.444 --> 00:52:28.948
might really benefit from educational signage or more ...

947
00:52:28.948 --> 00:52:31.919
frequent tours or some sort of thing like that,

948
00:52:31.919 --> 00:52:35.042
just to tell the public what's occurring on site,

949
00:52:35.042 --> 00:52:37.556
how their storm water is being managed,

950
00:52:37.556 --> 00:52:40.527
how the practices work, and why they're placed ...

951
00:52:40.527 --> 00:52:41.517
where they are.

952
00:52:42.960 --> 00:52:44.920
So that concludes my presentation.

953
00:52:45.000 --> 00:52:47.960
Does anyone have any questions on this second part?

954
00:52:56.640 --> 00:52:58.200
This is John Holmes again.

955
00:52:58.360 --> 00:53:01.810
It strikes me that a selection criteria would be,

956
00:53:01.810 --> 00:53:04.671
you know, what's the relative elevation ...

957
00:53:04.671 --> 00:53:08.879
of your flat area versus the elevation of your water source?

958
00:53:09.240 --> 00:53:11.491
I mean, if the water source is down ...

959
00:53:11.491 --> 00:53:14.224
too low, it's going to be difficult to get ...

960
00:53:14.224 --> 00:53:17.198
it into the flat area is what I'm suggesting.

961
00:53:17.240 --> 00:53:19.360
Did you look at that at all?

962
00:53:20.360 --> 00:53:22.648
I did not. I did not have elevation or ...

963
00:53:22.648 --> 00:53:26.919
slope data that I used in this version of the suitability analysis.

964
00:53:27.560 --> 00:53:29.107
Well, the elevation for the flat areas ...

965
00:53:29.107 --> 00:53:30.703
would be easy, but I'm not sure where you ...

966
00:53:30.703 --> 00:53:32.879
come up with the elevation for the concentrated flow.

967
00:53:32.920 --> 00:53:34.840
That'd be pretty challenging.

968
00:53:35.960 --> 00:53:38.680
That's probably where field verification would come into it.

969
00:53:38.720 --> 00:53:41.680
I'm not sure exactly how you would do that.  Yeah.

970
00:53:41.840 --> 00:53:43.160
All right, thank you.

971
00:53:47.440 --> 00:53:49.713
Hey, that's a great presentation,

972
00:53:49.713 --> 00:53:51.986
Laura, can you explain a little bit ...

973
00:53:51.986 --> 00:53:55.749
more the utility values for the percent impervious area,

974
00:53:55.749 --> 00:53:58.963
because that one was different than the other two ...

975
00:53:58.963 --> 00:54:00.060
where, you know,

976
00:54:00.060 --> 00:54:01.236
you just picked a.

977
00:54:01.280 --> 00:54:05.441
The kind of some middle imperviousness instead of the ...

978
00:54:05.441 --> 00:54:08.399
most impervious or least impervious.

979
00:54:08.440 --> 00:54:13.017
And I just curious why you chose those parameters,

980
00:54:13.017 --> 00:54:15.959
just to explain it to everybody.

981
00:54:16.440 --> 00:54:17.720
That's a good question.

982
00:54:17.840 --> 00:54:19.880
And I meant to explain that, but didn't.

983
00:54:20.000 --> 00:54:23.925
So percent impervious in this analysis was sort of what I ...

984
00:54:23.925 --> 00:54:27.433
was attempting to do was capture areas where there ...

985
00:54:27.433 --> 00:54:30.022
wasn't too much impervious surface,

986
00:54:30.022 --> 00:54:34.031
that you wouldn't have room to put a level spreader and its ...

987
00:54:34.031 --> 00:54:37.204
downstream area, but also areas that had some ...

988
00:54:37.204 --> 00:54:41.797
impervious surface so that you would have a source of stormwater.

989
00:54:42.320 --> 00:54:47.474
And so I believe here we had about 20 to 50 or 60%

990
00:54:47.474 --> 00:54:51.949
impervious, being what I consider to be ...

991
00:54:51.949 --> 00:54:54.119
the most suitable.

992
00:54:54.280 --> 00:54:56.886
But again, this probably needs to be ...

993
00:54:56.886 --> 00:55:00.621
decreased in the next iteration to like maybe ten or ...

994
00:55:00.621 --> 00:55:03.053
20% impervious just because even ...

995
00:55:03.053 --> 00:55:05.398
50% impervious surface is a lot.

996
00:55:06.440 --> 00:55:09.586
So did that answer your question or do you want.

997
00:55:09.586 --> 00:55:11.199
Absolutely. Thank you.

998
00:55:31.440 --> 00:55:34.974
The stakeholders are pretty quiet out there,

999
00:55:34.974 --> 00:55:39.438
but it'd be helpful to get a little input from them about if ...

1000
00:55:39.438 --> 00:55:43.065
this is something that we think we might want to ...

1001
00:55:43.065 --> 00:55:47.436
continue to explore as far as putting more of these items ...

1002
00:55:47.436 --> 00:55:50.040
into to help with Hinkson Creek.

1003
00:55:50.080 --> 00:55:53.497
And maybe the science team could weigh in as well if they ...

1004
00:55:53.497 --> 00:55:55.428
think that there's a, you know,

1005
00:55:55.428 --> 00:55:58.399
value in spending money on this type of project.

1006
00:56:05.160 --> 00:56:07.280
Erin, this is Rob Jacobson.

1007
00:56:07.440 --> 00:56:08.960
I've got that echo again.

1008
00:56:11.040 --> 00:56:14.752
One of the things that I've noted since I'm an avid ...

1009
00:56:14.752 --> 00:56:18.826
bicyclist is that there's so many places where you can ...

1010
00:56:18.826 --> 00:56:23.534
ride on bicycle trails around Columbia where the trail itself ...

1011
00:56:23.534 --> 00:56:25.797
could act as a level spreader.

1012
00:56:25.880 --> 00:56:30.387
It seems like an opportunity to create areas to upon some ...

1013
00:56:30.387 --> 00:56:34.799
of the runoff and create infiltration areas like this.

1014
00:56:36.160 --> 00:56:39.042
I think it's something that definitely should be looked ...

1015
00:56:39.042 --> 00:56:39.839
into more over.

1016
00:56:48.200 --> 00:56:49.880
Hi, this is Diane.

1017
00:56:49.880 --> 00:56:53.201
Early on, the stakeholders group and ...

1018
00:56:53.201 --> 00:56:56.522
Laura, you said that generally level ...

1019
00:56:56.522 --> 00:56:59.950
spreaders are used for a smaller area,

1020
00:56:59.950 --> 00:57:04.021
like a parking lot or somewhere where they're ...

1021
00:57:04.021 --> 00:57:07.878
concentrating storm in your suitability,

1022
00:57:07.878 --> 00:57:13.878
did you look at the possibility of lots of smaller level spreaders?

1023
00:57:13.920 --> 00:57:16.894
Kind of like maybe what Rob is talking about,

1024
00:57:16.894 --> 00:57:18.984
where instead of one, you know,

1025
00:57:18.984 --> 00:57:22.199
a few large ones, we'd have lots of smaller ones.

1026
00:57:23.520 --> 00:57:26.501
Yes. So my suitability analysis ...

1027
00:57:26.501 --> 00:57:31.359
didn't have specific sizes of level spreaders in it.

1028
00:57:31.960 --> 00:57:35.647
All it was showing were different areas around ...

1029
00:57:35.647 --> 00:57:38.577
Columbia, wherever the area might be ...

1030
00:57:38.577 --> 00:57:42.358
suitable for sort of any size of level spreader.

1031
00:57:43.440 --> 00:57:47.033
What size you use would really be dependent on how ...

1032
00:57:47.033 --> 00:57:50.889
much storm water you have to attenuate for a specific ...

1033
00:57:50.889 --> 00:57:53.518
area or how large your watershed is.

1034
00:57:53.680 --> 00:57:54.698
So, for example,

1035
00:57:54.698 --> 00:57:57.900
a level spreader that you have coming off of a parking ...

1036
00:57:57.900 --> 00:58:01.029
lot would be a lot smaller than like the forum nature ...

1037
00:58:01.029 --> 00:58:04.958
area level spreader that has that really big 120 acre watershed.

1038
00:58:06.200 --> 00:58:09.711
So it's really quite seems to be pretty scalable as a ...

1039
00:58:09.711 --> 00:58:12.079
stormwater management practice.

1040
00:58:17.800 --> 00:58:20.500
Hi, this is Janine Pagan and Erin ...

1041
00:58:20.500 --> 00:58:25.100
had asked if we thought this should be a thing to pursue.

1042
00:58:25.100 --> 00:58:26.600
I didn't realize.

1043
00:58:26.640 --> 00:58:28.800
I've only seen that level spreader off a forum.

1044
00:58:28.840 --> 00:58:32.840
I had no idea that you could obviously scale it down.

1045
00:58:32.880 --> 00:58:36.746
So I think that would be a thing to kind of look to the ...

1046
00:58:36.746 --> 00:58:40.612
future in different areas scaled on version so you ...

1047
00:58:40.612 --> 00:58:43.558
wouldn't have to have such a huge area.

1048
00:58:43.680 --> 00:58:45.960
So that's just my two cent on that.

1049
00:58:59.360 --> 00:59:01.736
Yeah. And I see that we have a ...

1050
00:59:01.736 --> 00:59:06.799
couple messages, but I'm not sure how exactly to view them.

1051
00:59:08.200 --> 00:59:11.683
So Richard Perkins asked what was the cost of the ...

1052
00:59:11.683 --> 00:59:13.598
project, and Tom Wellman,

1053
00:59:13.598 --> 00:59:15.252
who designed it, said,

1054
00:59:15.252 --> 00:59:19.518
we spent less than $50,000 on the design and construction.

1055
00:59:21.000 --> 00:59:24.040
We don't have the specific cost on that.

1056
00:59:24.600 --> 00:59:28.737
And then we spent a certain amount of money on the ...

1057
00:59:28.737 --> 00:59:30.599
study itself with mu.

1058
00:59:30.720 --> 00:59:34.400
But I'll have to spend a minute to look that up.

1059
00:59:35.040 --> 00:59:39.288
But I just want to say I also appreciate the feedback from ...

1060
00:59:39.288 --> 00:59:41.999
Rob and Diane and Janine. Thank you.

1061
00:59:47.600 --> 00:59:49.961
Once those costs have been incurred,

1062
00:59:49.961 --> 00:59:52.399
there really are no additional costs.

1063
00:59:52.440 --> 00:59:55.600
We just continue to accrue benefit.  Right.

1064
00:59:58.120 --> 01:00:00.320
You would have some maintenance to this site.

1065
01:00:00.400 --> 01:00:03.163
So one other thing that we saw on the forum level ...

1066
01:00:03.163 --> 01:00:05.288
spreaders, that you have to keep the ...

1067
01:00:05.288 --> 01:00:08.051
area around the level spreader and inside that ...

1068
01:00:08.051 --> 01:00:11.310
basin fairly clear so that you can still hold as much of a ...

1069
01:00:11.310 --> 01:00:13.435
volume of water inside of the basin,

1070
01:00:13.435 --> 01:00:16.127
and so that once water over tops the level lip,

1071
01:00:16.127 --> 01:00:19.740
it doesn't recall concentrate because there's a lot of large ...

1072
01:00:19.740 --> 01:00:21.794
trees or brush that block the flow.

1073
01:00:22.000 --> 01:00:25.709
So probably maintenance to it would be the only other ...

1074
01:00:25.709 --> 01:00:27.816
cost, just like with any other ...

1075
01:00:27.816 --> 01:00:30.260
stormwater management practice,

1076
01:00:30.260 --> 01:00:32.957
like bioretention or similar things.

1077
01:00:34.280 --> 01:00:35.560
Excellent presentation.

1078
01:00:35.640 --> 01:00:37.720
Thank you, Laura.  Thank you.

1079
01:00:40.280 --> 01:00:43.120
I had a question.  Can you hear me?  Yes.

1080
01:00:43.280 --> 01:00:46.800
This is Carl Scholar with the city city council.

1081
01:00:47.280 --> 01:00:49.160
Yes, it's a wonderful presentation.

1082
01:00:49.240 --> 01:00:50.360
It's tremendous detail.

1083
01:00:50.480 --> 01:00:53.680
I'm kind of in awe of some of the modeling.

1084
01:00:53.800 --> 01:00:56.026
Of course, the modeling is based on lots ...

1085
01:00:56.026 --> 01:00:58.320
of assumptions, and a couple of the folks ...

1086
01:00:58.320 --> 01:01:01.424
brought up a couple of really interesting points about ...

1087
01:01:01.424 --> 01:01:02.638
elevation and slope.

1088
01:01:02.840 --> 01:01:06.149
Slope is one of those things that we struggled with in a ...

1089
01:01:06.149 --> 01:01:07.399
different context.

1090
01:01:07.560 --> 01:01:10.753
But in terms of refining the modeling,

1091
01:01:10.753 --> 01:01:14.046
that seems to be a very important kind of ...

1092
01:01:14.046 --> 01:01:18.836
consideration in terms of how effective the measurement ...

1093
01:01:18.836 --> 01:01:22.927
processes are and with respect to funding and how ...

1094
01:01:22.927 --> 01:01:26.918
effective this can be for the entire watershed.

1095
01:01:27.000 --> 01:01:31.320
Care to comment on those kinds of issues about refining the modeling?

1096
01:01:32.000 --> 01:01:34.421
Yes. So especially with this GIs ...

1097
01:01:34.421 --> 01:01:37.739
mAF tool that could be used to find sites for,

1098
01:01:37.739 --> 01:01:39.981
like, different future level ...

1099
01:01:39.981 --> 01:01:43.478
spreaders, it really needs a landslope layer.

1100
01:01:43.600 --> 01:01:46.208
So whether that comes from, like,

1101
01:01:46.208 --> 01:01:48.816
the MS DiS, like the statewide Dem ...

1102
01:01:48.816 --> 01:01:51.983
models that they have, things like that,

1103
01:01:51.983 --> 01:01:56.082
it definitely needs a land slope layer so that you can ...

1104
01:01:56.082 --> 01:02:00.368
figure out whether that's going to be suitable as far as ...

1105
01:02:00.368 --> 01:02:04.281
measurement and modeling with the water balance,

1106
01:02:04.281 --> 01:02:05.492
I did use, heck,

1107
01:02:05.492 --> 01:02:07.728
HMS, which that's generally ...

1108
01:02:07.728 --> 01:02:12.014
software that you would use to model like sort of a worst ...

1109
01:02:12.014 --> 01:02:14.995
case scenario, like a flood scenario.

1110
01:02:16.240 --> 01:02:19.429
So a different model that I could have used would have ...

1111
01:02:19.429 --> 01:02:22.110
been like the SWOT model, which is GIS based,

1112
01:02:22.110 --> 01:02:25.516
but the data requirements for that are a lot more intense ...

1113
01:02:25.516 --> 01:02:27.038
than something like HMS.

1114
01:02:27.160 --> 01:02:31.269
So I thought for sort of the level of detail of a water ...

1115
01:02:31.269 --> 01:02:36.239
balance that I was doing, the model that I used was sufficient.

1116
01:02:37.160 --> 01:02:40.000
Is that what you were asking?  Yeah.  Thank you.

1117
01:02:40.120 --> 01:02:42.000
I thought slope was rather important.

1118
01:02:42.120 --> 01:02:45.316
And layman, I just thought that was an ...

1119
01:02:45.316 --> 01:02:46.759
obvious choice.

1120
01:02:46.960 --> 01:02:53.640
Yeah, this is John Holmes again.

1121
01:02:53.760 --> 01:02:55.996
I'm curious, you mentioned,

1122
01:02:55.996 --> 01:02:59.258
for the next round of this screening tool,

1123
01:02:59.258 --> 01:03:03.638
what are the plans for the future for the screening tool?

1124
01:03:04.560 --> 01:03:06.820
Well, that's sort of up to the cam ...

1125
01:03:06.820 --> 01:03:09.080
partners, if I haven't already.

1126
01:03:09.600 --> 01:03:14.065
I will put the folders that I had the GIS program in onto the ...

1127
01:03:14.065 --> 01:03:17.321
Dropbox site, so then the cam partners can ...

1128
01:03:17.321 --> 01:03:20.484
access that, and then that's sort of up to ...

1129
01:03:20.484 --> 01:03:24.670
you all where you'd like to go and if you'd like to use it ...

1130
01:03:24.670 --> 01:03:26.158
again or refine it.

1131
01:03:29.880 --> 01:03:31.160
Okay, thank you.

1132
01:03:43.720 --> 01:03:46.750
I think this was an ideal location that you started at ...

1133
01:03:46.750 --> 01:03:47.852
because, you know,

1134
01:03:47.852 --> 01:03:50.882
the science team has talked several times about how,

1135
01:03:50.882 --> 01:03:53.017
you know, it's great having riparian ...

1136
01:03:53.017 --> 01:03:54.876
areas, but a lot of times there's ...

1137
01:03:54.876 --> 01:03:58.319
these deep channels that just carry the water right through ...

1138
01:03:58.319 --> 01:04:00.316
the riparian areas into the creek.

1139
01:04:00.480 --> 01:04:04.640
And that's what makes this such a good site for this project.

1140
01:04:05.320 --> 01:04:07.720
And it kind of makes me wonder if we should be.

1141
01:04:07.840 --> 01:04:11.342
If maybe the next round should consider flood plains ...

1142
01:04:11.342 --> 01:04:14.844
as a screening criteria, just because you might have ...

1143
01:04:14.844 --> 01:04:15.958
that situation.

1144
01:04:17.360 --> 01:04:19.840
I think that might be a good idea.  Yeah.

1145
01:04:20.680 --> 01:04:24.246
Floodplains do have a lot of the characteristics that I saw ...

1146
01:04:24.246 --> 01:04:28.030
just from different literature, like sort of flatter slopes,

1147
01:04:28.030 --> 01:04:30.286
usually, and sometimes they're a bit ...

1148
01:04:30.286 --> 01:04:32.178
more open, so they might be good ...

1149
01:04:32.178 --> 01:04:34.798
locations for more level spreaders. Yeah.

1150
01:04:37.920 --> 01:04:40.080
Hello, this is Enos Innes.

1151
01:04:40.480 --> 01:04:42.000
Can you hear me?  Yes.

1152
01:04:42.080 --> 01:04:43.200
Hi, Doctor Ennis.

1153
01:04:44.760 --> 01:04:46.560
I just wanted to thank you, Laura.

1154
01:04:46.560 --> 01:04:48.000
That was a great presentation.

1155
01:04:48.200 --> 01:04:51.770
And I know one of the things that we had talked about ...

1156
01:04:51.770 --> 01:04:55.425
when we looked at creating this tool is to get the cam ...

1157
01:04:55.425 --> 01:05:00.440
partners thinking about the use of these level spreaders throughout.

1158
01:05:00.600 --> 01:05:04.920
And again, to reiterate what's been said,

1159
01:05:04.920 --> 01:05:07.759
smaller, more spread outs.

1160
01:05:07.960 --> 01:05:10.073
But then having that tool, I think,

1161
01:05:10.073 --> 01:05:13.060
helps folks start to really get in the mindset of,

1162
01:05:13.060 --> 01:05:16.266
and I like the conversation that's happening here of ...

1163
01:05:16.266 --> 01:05:17.359
where could it go?

1164
01:05:17.520 --> 01:05:19.160
And what sort of things are we looking for?

1165
01:05:19.240 --> 01:05:21.226
And with that public education,

1166
01:05:21.226 --> 01:05:24.169
I think you may have more people in the community ...

1167
01:05:24.169 --> 01:05:27.038
wanting to see level spreaders in their areas.

1168
01:05:27.120 --> 01:05:33.325
And so that's kind of the hope that we had when we ...

1169
01:05:33.325 --> 01:05:41.599
put together this particular tool to then hand over to Camden.

1170
01:05:43.640 --> 01:05:45.360
One other issue that occurred to me.

1171
01:05:45.360 --> 01:05:47.971
This is Carl again, and that is in some of the ...

1172
01:05:47.971 --> 01:05:50.654
areas where there is a significant amount of ...

1173
01:05:50.654 --> 01:05:53.773
impervious service, and particularly around some ...

1174
01:05:53.773 --> 01:05:55.731
of the roads, some of these roads ...

1175
01:05:55.731 --> 01:05:57.907
obviously are curbed and guttered,

1176
01:05:57.907 --> 01:05:59.357
and some of them are not.

1177
01:05:59.760 --> 01:06:03.564
And are there any considerations in those kinds ...

1178
01:06:03.564 --> 01:06:07.653
of areas for influences on some of your data and some ...

1179
01:06:07.653 --> 01:06:09.079
of your modeling?

1180
01:06:11.920 --> 01:06:13.520
Not in this version, no.

1181
01:06:13.600 --> 01:06:17.706
Just because the scale, this first version of the map ...

1182
01:06:17.706 --> 01:06:20.319
tool, really looks at things from ...

1183
01:06:20.319 --> 01:06:23.399
sort of a very large, big picture scale,

1184
01:06:23.399 --> 01:06:26.665
definitely, if you wanted to look at it in a ...

1185
01:06:26.665 --> 01:06:30.958
more site specific basis, just on one section of road or ...

1186
01:06:30.958 --> 01:06:32.918
something, definitely.

1187
01:06:33.040 --> 01:06:37.120
Whether there's a storm drain system existing there already ...

1188
01:06:37.120 --> 01:06:39.600
or nothing, would definitely have an ...

1189
01:06:39.600 --> 01:06:40.480
effect. Yes.

1190
01:06:46.280 --> 01:06:47.200
Thank you.

1191
01:07:04.840 --> 01:07:06.270
Well, that's been some great ...

1192
01:07:06.270 --> 01:07:07.999
comments and great conversation.

1193
01:07:08.480 --> 01:07:13.885
Did anybody else from action team or stakeholders or the ...

1194
01:07:13.885 --> 01:07:18.945
public or science team want to weigh in on thoughts or ...

1195
01:07:18.945 --> 01:07:24.235
ideas of level spreaders and how we should move forward ...

1196
01:07:24.235 --> 01:07:27.800
with implementing that or anything?

1197
01:07:32.000 --> 01:07:34.761
But one final comment about anything,

1198
01:07:34.761 --> 01:07:37.177
since you put it up, has to do with a ...

1199
01:07:37.177 --> 01:07:40.974
preoccupation that some of us on the city council has ...

1200
01:07:40.974 --> 01:07:44.598
with information and how we get that to the public.

1201
01:07:44.760 --> 01:07:49.160
And you mentioned that to encourage this discussion.

1202
01:07:49.320 --> 01:07:51.923
Obviously, the level of detail,

1203
01:07:51.923 --> 01:07:54.816
I'm just a mere neuropsychologist,

1204
01:07:54.816 --> 01:07:59.155
and the level of detail here in this geo stuff is kind of ...

1205
01:07:59.155 --> 01:08:01.855
stunning to me, but nonetheless,

1206
01:08:01.855 --> 01:08:06.098
getting that kind of message to the folks on any issue ...

1207
01:08:06.098 --> 01:08:10.052
other than trash these days is very challenging,

1208
01:08:10.052 --> 01:08:13.716
and it requires almost one page summary data.

1209
01:08:13.760 --> 01:08:15.800
And how would you suggest that we.

1210
01:08:15.880 --> 01:08:20.600
I'm not laying this on you, but it's always a challenge for communication.

1211
01:08:20.960 --> 01:08:22.712
As long as you can generate interest,

1212
01:08:22.712 --> 01:08:23.559
that's one thing.

1213
01:08:23.600 --> 01:08:27.264
But to get people to engage in some of the discussion,

1214
01:08:27.264 --> 01:08:31.011
this is going to have to be simplified to some extent to ...

1215
01:08:31.011 --> 01:08:33.759
make them, to encourage them to engage.

1216
01:08:35.880 --> 01:08:37.841
Well, one thing that back when I ...

1217
01:08:37.841 --> 01:08:40.933
was a student at Mizzou and working with the city,

1218
01:08:40.933 --> 01:08:44.101
one thing that we discussed was maybe putting some ...

1219
01:08:44.101 --> 01:08:46.439
educational signage out of the site.

1220
01:08:46.560 --> 01:08:49.278
So I know with the forum level spreader,

1221
01:08:49.278 --> 01:08:51.419
when I was out collecting data,

1222
01:08:51.419 --> 01:08:54.713
I would sometimes have people stop by and ask me,

1223
01:08:54.713 --> 01:08:57.678
you know, what this was and what I was doing.

1224
01:08:57.880 --> 01:09:01.948
And so I think some form of signage out of the site would ...

1225
01:09:01.948 --> 01:09:06.016
really help people to know what it is and maybe why it's ...

1226
01:09:06.016 --> 01:09:08.547
there and why during rainstorms,

1227
01:09:08.547 --> 01:09:11.078
water backs up close to the trail.

1228
01:09:11.200 --> 01:09:15.120
Because I'm not sure if some people understood why that was happening.

1229
01:09:15.280 --> 01:09:18.091
So I think public education is really important,

1230
01:09:18.091 --> 01:09:21.108
and putting it in simple enough terms that the public ...

1231
01:09:21.108 --> 01:09:24.399
would be able to understand quickly is important as well.

1232
01:09:26.520 --> 01:09:28.640
Yeah, it's a great idea.  Thank you.

1233
01:09:28.840 --> 01:09:31.120
And if I could add to that.

1234
01:09:31.440 --> 01:09:32.345
I know, Laura,

1235
01:09:32.345 --> 01:09:34.985
probably one of the challenges you had was ...

1236
01:09:34.985 --> 01:09:38.380
you're just downstream from the three M wetland area,

1237
01:09:38.380 --> 01:09:40.718
where there is quite a bit of signage.

1238
01:09:40.800 --> 01:09:45.474
And I think the city did go through some effort to do ...

1239
01:09:45.474 --> 01:09:48.479
little tours through that area.

1240
01:09:48.560 --> 01:09:54.948
And so being able to duplicate the three M project ...

1241
01:09:54.948 --> 01:10:01.647
elsewhere may be part of the step forward as part of a ...

1242
01:10:01.647 --> 01:10:04.919
stakeholder committee.

1243
01:10:05.040 --> 01:10:08.292
So if we happen to see an area that we thought,

1244
01:10:08.292 --> 01:10:11.808
I wonder if this level spreader idea would work,

1245
01:10:11.808 --> 01:10:13.038
who would we say?

1246
01:10:13.080 --> 01:10:15.495
You know, say we obviously wouldn't ...

1247
01:10:15.495 --> 01:10:16.541
send, you know,

1248
01:10:16.541 --> 01:10:18.232
coordinates, more like,

1249
01:10:18.232 --> 01:10:19.923
you know, an area street,

1250
01:10:19.923 --> 01:10:21.453
you know, street wise,

1251
01:10:21.453 --> 01:10:22.338
or, you know,

1252
01:10:22.338 --> 01:10:25.237
neighborhood area or a trail area or a park.

1253
01:10:25.360 --> 01:10:27.000
Who would we send our.

1254
01:10:27.160 --> 01:10:28.840
Our suggestion to?

1255
01:10:31.240 --> 01:10:34.206
That's a good question. You could probably send it to ...

1256
01:10:34.206 --> 01:10:37.105
me if it's in the city, or send it to Nikki or Michele ...

1257
01:10:37.105 --> 01:10:38.318
if it's in the county.

1258
01:10:38.480 --> 01:10:40.520
Orlando.

1259
01:10:40.880 --> 01:10:43.616
I'm not sure who at Mu would like that,

1260
01:10:43.616 --> 01:10:47.146
but if it's on campus, I'm not sure how many spots ...

1261
01:10:47.146 --> 01:10:48.999
on campus there might be.

1262
01:10:49.080 --> 01:10:55.424
I do know that Tom is always looking at opportunities in ...

1263
01:10:55.424 --> 01:11:01.079
areas to implement different BMP's such as this.

1264
01:11:01.240 --> 01:11:02.880
We've always got our eye on some.

1265
01:11:02.920 --> 01:11:07.640
It's just a matter of trying to prioritize that in with actual.

1266
01:11:07.720 --> 01:11:08.514
With, you know,

1267
01:11:08.514 --> 01:11:11.999
hard infrastructure that needs replacement and that sort of thing.

1268
01:11:12.040 --> 01:11:15.617
So that's something we're working towards,

1269
01:11:15.617 --> 01:11:20.354
is trying to integrate some of these green infrastructure ...

1270
01:11:20.354 --> 01:11:25.478
practices in with the other infrastructure we have to replace.

1271
01:11:26.320 --> 01:11:29.040
This is Todd Hatsman University for the university.

1272
01:11:29.200 --> 01:11:31.200
Anybody at environmental health and safety?

1273
01:11:31.280 --> 01:11:32.520
You know, we're all very close.

1274
01:11:32.560 --> 01:11:35.483
So John White myself, if there was something ...

1275
01:11:35.483 --> 01:11:38.881
identified here and you want to let us know about it,

1276
01:11:38.881 --> 01:11:42.279
we'd be very, very pleased to get that information.

1277
01:11:42.680 --> 01:11:45.960
I also want to build just slightly on what Carl said ...

1278
01:11:45.960 --> 01:11:48.693
about when he mentioned, like a one pager,

1279
01:11:48.693 --> 01:11:50.879
that the idea of signage is great.

1280
01:11:50.960 --> 01:11:54.390
But for me, in order to sell this concept or ...

1281
01:11:54.390 --> 01:11:57.232
any concept to administration mu,

1282
01:11:57.232 --> 01:12:00.172
that's the kind of almost, you know,

1283
01:12:00.172 --> 01:12:04.582
really not dumbed down, but just really simplified of ...

1284
01:12:04.582 --> 01:12:08.600
this is what you tried to do, this is what we found.

1285
01:12:09.040 --> 01:12:12.691
That's about all I can get in front of somebody would be a ...

1286
01:12:12.691 --> 01:12:14.119
single page of paper.

1287
01:12:14.240 --> 01:12:17.052
And for anything that's improving the Hinkson,

1288
01:12:17.052 --> 01:12:20.075
being able to figure out both from your scientific,

1289
01:12:20.075 --> 01:12:22.887
very heavy scientific way of looking at things,

1290
01:12:22.887 --> 01:12:25.558
but how can you provide something to get to the ...

1291
01:12:25.558 --> 01:12:28.721
audience that are just not going to understand that or ...

1292
01:12:28.721 --> 01:12:31.603
not going to look at anything in any depth would be ...

1293
01:12:31.603 --> 01:12:32.798
extremely helpful?

1294
01:12:39.520 --> 01:12:41.479
Yeah, I have to say I appreciate ...

1295
01:12:41.479 --> 01:12:43.438
that, because that's one of the ...

1296
01:12:43.438 --> 01:12:46.904
biggest challenges that we have in the political realm ...

1297
01:12:46.904 --> 01:12:49.918
these days, is engaging people with something.

1298
01:12:50.000 --> 01:12:52.800
And there's a whole range of folks.

1299
01:12:52.880 --> 01:12:54.386
I mean, I have an academic ...

1300
01:12:54.386 --> 01:12:55.462
background, too,

1301
01:12:55.462 --> 01:12:58.619
but it's been a lot of years since I delved deeply into ...

1302
01:12:58.619 --> 01:12:59.838
some of this detail.

1303
01:13:00.120 --> 01:13:02.748
And to the extent that we can have some sort of an ...

1304
01:13:02.748 --> 01:13:05.511
executive summary with footnotes if necessary,

1305
01:13:05.511 --> 01:13:08.678
if people want to dig into it, that would be very helpful.

1306
01:13:08.720 --> 01:13:10.565
I love that idea about the signage,

1307
01:13:10.565 --> 01:13:12.919
because on a basic level, that's important.

1308
01:13:13.120 --> 01:13:15.535
The visual stuff would be great,

1309
01:13:15.535 --> 01:13:19.560
but I can't emphasize enough and follow up on that last ...

1310
01:13:19.560 --> 01:13:23.585
comment that this is essential even for people who are ...

1311
01:13:23.585 --> 01:13:27.073
relatively sophisticated in their own areas,

1312
01:13:27.073 --> 01:13:29.398
not necessarily in hydrology.

1313
01:13:40.760 --> 01:13:42.920
I think that's all some great feedback.

1314
01:13:43.480 --> 01:13:47.344
I think we can definitely take some of that back to the ...

1315
01:13:47.344 --> 01:13:51.296
action team and figure out what our next steps just for ...

1316
01:13:51.296 --> 01:13:55.599
this one project might be to be able to keep moving forward.

1317
01:13:58.720 --> 01:14:03.580
So I don't know if anybody else has anything they want ...

1318
01:14:03.580 --> 01:14:05.679
to share or comment on.

1319
01:14:05.800 --> 01:14:09.550
I don't know if Michele has any parting comments or ...

1320
01:14:09.550 --> 01:14:13.039
statements about maybe the next presentation.

1321
01:14:14.120 --> 01:14:15.520
Yeah, yeah.

1322
01:14:15.560 --> 01:14:17.400
The next presentation will be.

1323
01:14:17.480 --> 01:14:21.280
You'll be able to reach with the same link that was sent out.

1324
01:14:21.680 --> 01:14:23.617
And if you guys have any troubles,

1325
01:14:23.617 --> 01:14:26.939
just feel free to email me, and I'll try to help figure that ...

1326
01:14:26.939 --> 01:14:27.838
out for you all.

1327
01:14:27.960 --> 01:14:29.040
And it will be.

1328
01:14:29.160 --> 01:14:31.448
Cody will be presenting and talking about the ...

1329
01:14:31.448 --> 01:14:34.519
macroinvertebrate study, which should be pretty exciting.

1330
01:14:34.920 --> 01:14:37.960
And I just want to thank Laura again for.

1331
01:14:38.920 --> 01:14:41.407
I was very enthralled with all the work that you've done.

1332
01:14:41.407 --> 01:14:42.359
It's pretty amazing.

1333
01:14:42.440 --> 01:14:43.800
So thanks for sharing.

1334
01:14:43.960 --> 01:14:46.480
Well, thank you for allowing me to present today.

1335
01:14:48.080 --> 01:14:48.959
All right. And,

1336
01:14:48.959 --> 01:14:50.919
yeah, thank you all for attending.

1337
01:14:51.040 --> 01:14:54.405
And I will send you guys the link as soon as we're able to ...

1338
01:14:54.405 --> 01:14:56.199
process it up on our website.

1339
01:14:56.280 --> 01:14:58.589
So if you want to share with any of your friends,

1340
01:14:58.589 --> 01:15:01.076
you are more than welcome to and invite anybody who ...

1341
01:15:01.076 --> 01:15:02.319
you'd like to come along.

1342
01:15:02.440 --> 01:15:03.840
All right, thank you all.

1343
01:15:04.920 --> 01:15:05.920
Thank you.

1344
01:15:07.080 --> 01:15:09.080
Thank you.  Thanks, everybody.

1345
01:15:10.520 --> 01:15:11.600
Thanks again.  Bye.