Effect of Nonstandard Rainfall Distributions on Stormwater Management Detention Basins

by Robert G. Traver, (M.ASCE), Villanova Univ, Villanova, United States,
Ronald A. Chadderton, (M.ASCE), Villanova Univ, Villanova, United States,

Document Type: Proceeding Paper

Part of: Water Policy and Management: Solving the Problems


A rural watershed is modeled to determine the effect of varying rainfall patterns on stormwater management detention basins designed for center peaking events. A hydrologic model of the watershed was developed and calibrated. The model was selectively 'urbanized' with and without stormwater detention basins. Peak flows from early, center and late peaking rainfalls were compared along the stream system. Late peaking rainfall distributions caused the highest peak flows while early peaking storms caused the least efficient basin performance.

Subject Headings: Hydrologic models | Rain water | Hydrology | Storm sewers | Stormwater management | Watersheds | Detention basins | Retention basins

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