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Rainfall-Loss Parameter Estimation for Illinois

by Linda S. Weiss, (A.M.ASCE), US Geological Survey, Urbana, IL, USA,
Audrey L. Ishii, (S.M.ASCE), US Geological Survey, Urbana, IL, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

The U. S. Geological Survey is currently conducting an investigation to estimate values of parameters for two rainfall-loss computation methods used in a commonly used flood-hydrograph model. Estimates of six rainfall-loss parameters are required: four for the Exponential Loss-Rate method and two for the Initial and Uniform Loss-Rate method. Multiple regression analyses on calibrated data from 616 storms at 98 gaged basins are being used to develop parameter-estimating techniques for these six parameters at ungaged basins in Illinois. Parameter-estimating techniques are being verified using data from a total of 105 storms at 35 uncalibrated gaged basins.

Subject Headings: Parameters (statistics) | Rainfall | Floods | Data analysis | Retention basins | Storms | Regression analysis | Illinois | United States

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