2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2018 | 11:30 AM - 11:45 AM | INFLUENCE OF STORMWATER CONTROL MEASURES ON WATER QUALITY IN SMALL, NESTED SUBURBAN WATERSHEDS | 310 A
INFLUENCE OF STORMWATER CONTROL MEASURES ON WATER QUALITY IN SMALL, NESTED SUBURBAN WATERSHEDS
Urban stormwater runoff has drawn the attention of water managers because of its deleterious impacts on stream ecosystems and its contribution to eutrophication of receiving waters. The hydraulically efficient transport of runoff through modified drainage networks effectively causes runoff to bypass natural storage zones that buffer biogeochemical responses to storm events. As engineered analogs of natural solute processing hotspots, stormwater control measures (SCMs) are designed to facilitate solute uptake, assimilation, and transformation. However, at the watershed-scale, where multiple confounding influences impact solute behavior, SCM mitigation is not consistently linked to improvements in water quality. To assess cumulative effects of SCMs, we monitored storm discharge and stream water chemistry at high temporal resolution along a longitudinal gradient of nested SCM-treated watersheds in Charlotte, NC. Results show that the cumulative effect of SCMs can reduce instream concentrations of soluble reactive phosphorus, dissolved organic nitrogen, and ammonia to that of the reference stream, however SCMs have no impact on major cations and sulfate concentrations, which increase with urbanization. Additionally, water storage availability has a significant impact on solute flushing behavior; controls on solute transport vary dependent on antecedent conditions and precipitation depth.
- Urban
- Non-point Source
- Water Quality
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Presenters/Authors
Rachel Scarlett
(), Purdue University, rscarlet@purdue.edu;
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Sara McMillan
(), Purdue University, mcmill@purdue.edu;
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Colin Bell
(), Colorado School of Mines, cdbell@mines.edu;
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Anne Jefferson
(), Kent State University, ajeffer9@kent.edu;
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Sandra Clinton, PhD
(), University of North Carolina at Charlotte, sclinto1@uncc.edu;
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Suresh Rao
(), Purdue University, sureshrao@purdue.edu;
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