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Effects of a floodwater-retarding structure on the hydrology and ecology of Trout Creek in southwestern Wisconsin

Water-Resources Investigations Report 82-23

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,

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Abstract

The primary effect of a floodwater-retarding structure (FRS) on the flow of Trout Creek, Wisconsin is attenuation of flood peaks. Reduction of flood peaks ranged from 58 to 91% during the study period, 1975 to 1979. An inverse relationship exists between sediment concentration and outflow from the FRS during floods. Most sediment stored in the flood pool during floods is released from the reservoir during subsequent reduced discharge. Sediment-trapping efficiency of the FRS was 7% during the 4-year study. The bankfull capacity of the channel was reduced from 154 cubic feet per second upstream from the FRS to 65 cubic feet per second downstream. Mean bankfull depth downstream from the FRS has adjusted to a value 45% less than upstream from the structure due to the sedimentation of materials transported from the FRS during reduced flows. The FRS was not found to have any significant adverse effect on the arthropod fauna or trout reproduction in Trout Creek from 1975 to 1979. During 1960-1979, winter floods seem to have had the greatest adverse effect on the survival of brown trout eggs and sac fry. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Effects of a floodwater-retarding structure on the hydrology and ecology of Trout Creek in southwestern Wisconsin
Series title:
Water-Resources Investigations Report
Series number:
82-23
Edition:
-
Year Published:
1982
Language:
ENGLISH
Publisher:
U.S. Geological Survey, Water Resources Division,
Description:
vi, 68 p. :ill., maps ;28 cm.
Number of Pages:
74