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Watearth Integrating Low Impact Development into Flood Plain Management

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Published on May 11, 2016

Have you wondered how to incorporate Low Impact Development (LID) into flood plain management? This presentation by Jennifer J. Walker, P.E., D.WRE, CFM, QSD at the March, 2016 Texas Flood Plain Management Association conference in Houston addresses those items. Detention for Holderrieth Road, a major thoroughfare in Harris County, is provided by LID features within the road right-of-way, including bioretention and vegetated swales. One alternative also considers using vegetated swale and regional detention within the Harris County Improvements District (HCID) 17 regional detention basin and flood plain storage mitigation is provided within the regional detention basin.

The project also includes two stream crossings, channel improvements (widening) and stream mitigation (natural/benched sections) to meet U.S. Army Corps of Engineers (USACE) permit requirements. An overview of the HCID 17 regional detention system and channel improvements is discussed, while the presentation focuses on the Holderrieth Road detention system layout, design, and modeling results. This project includes HEC-RAS, HEC-HMS, and EPA SWMM modeling within the Willow Creek watershed.

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