Estimating Floodplain Limits for Complicated Hydrologic and Hydraulic Conditions

by A. Allen Bradley, Princeton Univ, Princeton, United States,
Kenneth W. Potter, Princeton Univ, Princeton, United States,



Document Type: Proceeding Paper

Part of: Engineering Hydrology

Abstract:

A new approach for estimating floodplain limits is shown. A hydraulic model with flood routing capabilities is coupled with a hydrologic model to compute river stages. Simulations are made using historical precipitation data to produce long continuous flow records. Simulations are also made using precipitation data for extreme storms to gain additional information on overbank flooding. A new statistical approach is then applied directly to the simulated peak stages to estimate peak stage exceedence probabilities. This approach is best suited to complicated floodplain mapping problems where the design storm assumption is unreasonable or where backwater and floodplain effects are important.

Subject Headings: Hydrologic models | Floods | Computer models | Hydraulic models | Precipitation | Statistics | Hydrologic data

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