Stormwater Symposium

Oral

397463 - Regenerative Stormwater Conveyance: Monitoring and Analysis in the Piedmont Region of North Carolina

Thursday, June 7
10:30 AM - 12:00 PM
Location: Greenway AB
Co-Authors: Sarah Wackowski, Raleigh, North Carolina – North Carolina State University; William Hunt, Raleigh, North Carolina – North Carolina State University

Regenerative Stormwater Conveyance (RSC) is a stormwater control measure that integrates stream restoration and urban stormwater management techniques to stabilize eroded stream channels, improve ecological habitat, and provide pollutant treatment. RSCs incorporate shallow pools, boulder-weir grade control structures, and sand and wood chip underlying media to safely conveyance large stormflows while providing pollutant treatment for design storms. Insufficient – and somewhat contradictory - data exists to accurately quantify the hydrologic and water quality benefits of RSCs for regulatory purposes in North Carolina. This study investigated the hydrologic and water quality performance of a small RSC constructed to stabilize an eroded stormwater dry pond outfall in Morrisville, North Carolina. Nutrient and sediment load reductions were calculated based on influent and effluent event mean concentrations, while hydrologic performance was based on inflow-outflow analysis. The results of this research project will be synthesized with those of previous studies in North Carolina to devise stormwater design guidelines for the state.

Simon Benjamin. Gregg, EI, LEED Green Associate

Graduate researcher
North Carolina State University

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