2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | Urban runoff source partitioning using isotopic analysis of nitrate and sulfate | Virtual Platform
Urban runoff source partitioning using isotopic analysis of nitrate and sulfate
Determining the source of stormwater runoff (and thus the associated source of pollutants), is a critical need in urban hydrology to optimize siting of stormwater controls and improve water quality monitoring. This study employs stable isotope analysis to attempt to identify environmental tracers for stormwater partitioning. Three monitoring sites on a unique urban watershed with forested headwaters in the city of Knoxville, TN allowed collection of flow-paced stream samples during the course of various storm events in all four seasons. Water samples were also collected throughout the watershed during dry weather to evaluate a baseflow control. This study builds upon known isotopic environmental tracers by investigating the application of this technique to urban runoff endmembers, such as roadway, rooftop, and grass runoff sources. The results are essential to understanding impervious surface connectivity and how that effects nutrient sources and transport during storm events.
- Biogeochemistry
- Ecohydrology
- Urban streams
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Presenters/Authors
Victoria Rexhausen
(), University of Tennessee, vrexhaus@vols.utk.edu;
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Jon Hathaway
(), University of Tennessee, hathaway@utk.edu;
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Ania Szynkiewicz
(), University of Tennessee, aszynkie@utk.edu;
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