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- Info
Estimating magnitude and frequency of floods for Wisconsin urban streams
| Author: |
Cogner, Duane H. |
| Date: |
1986 |
| Periodical: |
Water-Resource Investigations Report 86-4005. U.S. Department of the Interior, Geological Survey, Madison, WI. In cooperation with: Wisconsin Department of Transportation, Southeastern Wisconsin Regional Planning Commission, Milwaukee Metropolitan Sewage Commission |
| Abstract: |
Equations for estimating magnitude and frequency of floods for Wisconsin streams with drainage basins containing various amounts of existing or projected urban development were developed by flood-frequency and multiple-regression analyses. Multiple-regression techniques were used to develop equations for estimating flood frequencies at ungaged urban sites. The flood-frequency equations are based on data from 32 urban gaging stations, including 19 crest-stage gages and 13 rainfall-runoff gaging stations. Significant characteristics in the equations are drainage area and impervious area. Standard errors of estimate for the regression equations ranged from 32 to 39 percent. Separate equations were developed for Milwaukee County. The U.S. Geological Survey Distributed Routing Rainfall-Runoff Model Version 11 was used to extend records by synthesis for the 13 rainfall-runoff urban stations. |
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