Publication Citation

USGS Series Water-Resources Investigations Report
Report Number 86-4005
Title Estimating magnitude and frequency of floods for Wisconsin urban streams
Edition -
Language ENGLISH
Author(s) Conger, D. H.
Year 1986
Originating office
USGS Library Call Number (200) WRi no.86-4005
Physical description iv, 18 p. :maps ;28 cm.
ISBN

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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%-39%. Separate equations were developed for Milwaukee County. The USGS Distributed Routing Rainfall-Runoff Model-Version II was used to extend records by synthesis for the 13 rainfall-runoff urban stations. (Author 's abstract)