Design and Evaluation of Storm Water Detention Facilities Using a Design Storm and Probable Maximum Storm

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by Rocky J. Keehn, Short-Elliott Hendrickson Inc, United States,
Mark L. Lobermeier, Short-Elliott Hendrickson Inc, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering:

Abstract: When designing a storm water detention facility, both a design storm (DS) and a probable maximum storm (PMS) should be considered. The DS is used to design the facility. The PMS is used to set a freeboard elevation. Sensitivity analysis using the TR-20 program was utilized to evaluate the DS and PMS as part of the Roseville, Minnesota Surface Water Management Plan (SWMP). The Roseville SWMP also demonstrates how the DS/PMS method provides a cost effective approach for managing storm water runoff while providing a sufficient protection level for the given recurrence interval.

Subject Headings: Stormwater management | Storms | Building design | Sensitivity analysis | Water use | Surface water | Computer aided design | Runoff | Management methods | North America | Minnesota | United States

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