Flood Mitigation Powerpoint Presentation by Clark Rieke
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Transcript of Flood Mitigation Powerpoint Presentation by Clark Rieke
![Page 1: Flood Mitigation Powerpoint Presentation by Clark Rieke](https://reader033.fdocuments.us/reader033/viewer/2022060205/55a184381a28ab5e688b4582/html5/thumbnails/1.jpg)
The Most Effective Flood Mitigation Is A Blend of 3 Factors:Upstream Storm-water DetentionChannel Flow EnhancementLevee Height
Created by
Clark Rieke
319 521-5212
![Page 2: Flood Mitigation Powerpoint Presentation by Clark Rieke](https://reader033.fdocuments.us/reader033/viewer/2022060205/55a184381a28ab5e688b4582/html5/thumbnails/2.jpg)
These 42 mini-watersheds in the 26 sq. milesof Palo’s Dry Creek Watershed demonstrate potential locations for 42 watergates, many of which would only have to be 4’-8’ high.
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This is an example of an experiment in water gate design.
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This is an example of an experiment in water gate design in a 10’x8’ concrete culvert just outside of Palo, IA.
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This channel between Shaver Rd. and the Cedar River can become the site for experimenting with different water gate designs.
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This creek bed
has significant
temporary
storm-water
storage capacity
if water gates
are installed in
front of these
concrete
culverts under
I-35 west of
Swaledale, IA
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Big Marsh in Butler County along the west fork of the Cedar River is 4400 acres. Its concrete culverts with partial water gates gives it potential as a temporary low-cost storm-water storage site.
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The McCloud’s
Run and its
watershed in NE
Cedar Rapids
runs along I-380
and could be
used for
Upstream storm-
water detention.
![Page 9: Flood Mitigation Powerpoint Presentation by Clark Rieke](https://reader033.fdocuments.us/reader033/viewer/2022060205/55a184381a28ab5e688b4582/html5/thumbnails/9.jpg)
Water gates in front of these three culverts would make McLoud’s Run basin a temporary storm-water detention site.
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A water gate in front of this culvert makes the ditch alongside the railroad tracks parallel to McLoud’s Run a temporary storm-water detention site.
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Waverly, IA is replacing its concrete dam with this 99% adjustable dam because this dam, with a channel flow restriction of only 1% when it is down, will reduce future flash flood crests by 2 feet and also has potential use as a valve in the river after the crest passes.
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Dam in Nashua, IA, with largereservoir/lake needs to be adjustable so the reservoir can be emptied before a flood crest comes to this city as it progresses down the river basin.
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This is an example of adjustable gates in a dam in downtown Cedar Falls.
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If all the many dams throughout the Cedar River watershed were converted to adjustable dams, they could be used as valves to manage the height of a flood crest.
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This bridge in downtown Cedar Falls demonstrates a design that does not restrict the river channel’s flow.
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Both ends of the Cedar Rapids 5-in-1 Dam restrict the river’s channel.
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This is a photo of the hydroelectric plant that currently blocks the Cedar River’s flow at this gate in the 5-in-1 Dam.
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The hydroelectric plant at the 5-in-1 Dam restricts channel flow in one of the 10 gates.