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Rainfall Analysis for Efficient Detention Ponds

by T. Hvitved-Jacobsen, Univ of Aalborg, Denmark,
Y. A. Yousef, Univ of Aalborg, Denmark,
M. P. Wanielista, Univ of Aalborg, Denmark,



Document Type: Proceeding Paper

Part of: Design of Urban Runoff Quality Controls

Abstract:

Intensity-duration-frequency analysis of rainfall data is traditionally used for the selection of design storm required to size, storage capacity in detention/retention ponds without consideration of no rain periods before and after storm events. However storage utilization in the pond depends on incoming runoff event volumes and the inter-event dry periods. Inter-event dry periods between two successive storms should be sufficiently long to minimize cumulative effects of pollutants discharged to receiving streams. This paper discusses the concept of inter-event dry period and its application for designing urban retention/detention ponds.

Subject Headings: Retention basins | Detention basins | Rainfall intensity | Drainage basins | Urban areas | Storms | Runoff

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