Impact of Detention Storage on Main Stream Flooding

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by William E. Spearman, South Carolina Land Resources, Commission, United States,
Michael E. Meadows, South Carolina Land Resources, Commission, United States,

Document Type: Proceeding Paper

Part of: National Water Conference

Abstract: The methodology, results and management implications are presented for a stormwater study at an urban watershed experiencing periodic flooding along the main channel. Local data were collected to calibrate a stormwater model which was used to evaluate mixes of detention storage and channel improvements. Simulation results for current and anticipated future land use were used to identify flood prone areas, and provided the basis for structural and policy recommendations. The current detention policy was shown to have a negative impact on downstream flooding. As a consequence, the local municipality now requires new developments to demonstrate no off-site impacts.

Subject Headings: Floods | Stormwater management | Urban development | Municipal water | Water storage | Rivers and streams | Management methods | Watersheds |

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