PUBLICATIONS--Report "Techniques for Estimating Flood Hydrographs for Ungaged Urban Watersheds" by Virginia Stricker and Vernon Sauer June 14, 1982 SURFACE WATER BRANCH TECHNICAL MEMORANDUM NO. 82.10 Subject: PUBLICATIONS--Report "Techniques for Estimating Flood Hydrographs for Ungaged Urban Watersheds" by Virginia Stricker and Vernon Sauer The attached report describes a technique for estimating flood hydrographs for ungaged urban watersheds. The technique utilizes a dimensionless hydrograph and an estimate of the watershed lagtime and peak discharge. Regression equations for estimating watershed lagtime and peak discharge for ungaged urban watersheds were developed in a nationwide study of urban flood frequency in cooperation with the Federal Highway Administration. The results of this nationwide study will be published as U.S. Geological Survey Water-Supply Paper 2207 next fall. The attached report was also completed as part of this nationwide study. All WRD employees engaged in flood-frequency projects should be familiar with the attached report. The State Highway Departments may be interested in projects oriented toward estimating flood hydrographs for rural or urban watersheds. Techniques described in the attached report are applicable to rural watersheds if the regression equations for estimating watershed lagtime and peak discharge are based on rural watershed data. A few additional copies of the report may be obtained from the Surface Water Branch or the Regional Office in Atlanta, Georgia. Stanley P. Sauer Acting Chief, Surface Water Branch Attachment Distribution: A, FOLS, PO "This memorandum does not supersede any previous SWB Memorandum."