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Detention Basin Design Exposed! (See All the Graphic Details)

Author(s): David C. Froehlich

Linked Author(s): David Froehlich

Keywords: No Keywords

Abstract: Graphs that supply dimensionless values of the maximum peak outflow rate from a basin, the maximum storage volume, and the critical storm duration (that is, the storm duration that produces the peak outflow and maximum storage volume) are prepared from numerical solutions of a dimensionless form of the differential basin storage equation. The approach relies on the modified rational method to provide the catchment runoff hydrograph, a linearized relation between basin water depth and storage volume, and a rainfall intensity-duration equation for which coefficients can be found easily for any location in the semiarid southwestern United States. The method avoids repetitive calculations and provides accurate solutions rapidly in an uncomplicated way for small catchments of about 12 ha or less with times of concentration less than about 30 min.

DOI:

Year: 2009

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