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Modeling trace organic contaminants in commercial and high-density residential urban stormwater runoff
Brown, Jacob
Brown, Jacob
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2018
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2019-09-28
Abstract
Urbanization can dramatically alter stormwater, both the quantity and quality, by engendering larger peak flows and through the introduction of contaminants into stormwater runoff. This study builds upon previous research that developed relationships between a suite of nonpoint source contaminants, known as trace organic contaminants (TOrCs), and hydrologic measurements for a series of storms in Madison, WI, by creating statistical and deterministic models. Stormwater runoff from both a commercial site and a high-density residential site was characterized for TOrCs in a previous study. Correlations and regressions were calculated between TOrC loads and hydrologic measurements for both sites. Regressions were possible for all but two contaminants. From the regressions, it became evident that loading responses to precipitation were not the same between the two land covers for some TOrCs. The regressions were transferred to the Source Loading and Management Model for Windows (WinSLAMM), an event-based hydrologic and water quality model, to demonstrate how it can be used to model novel contaminants. The regressions were also used to estimate mean annual loads of TOrCs from all commercial and high-density residential areas in Madison, WI. This work will ultimately allow managers to simulate the presence and mitigation of TOrCs through stormwater best management practices.
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