Estimating magnitude and frequency of floods for Wisconsin urban streams

Water-Resources Investigations Report 86-4005
Prepared in cooperation with the Wisconsin Department of Transportation, Southeastern Wisconsin Regional Planning Commission, and Milwaukee Metropolitan Sewage Commission



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)

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Estimating magnitude and frequency of floods for Wisconsin urban streams
Series title Water-Resources Investigations Report
Series number 86-4005
DOI 10.3133/wri864005
Year Published 1986
Language English
Publisher U.S. Geological Survey
Contributing office(s) Wisconsin Water Science Center
Description iv, 18 p.
Country United States
State Wisconsin
City Green Bay, Janesville, Madison, Milwaukee, Superior, Wausau
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details