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A Decision Support Framework to Facilitate Nitrogen Load Reductions in the Long Island Sound (LIS) Watershed

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Abstract:

A 10% target total nitrogen (TN) load reduction has been set for the urban and agricultural non-point sources as part of a larger plan whose goal is to eliminate hypoxia in the western end of LIS. The Management Committee envisioned a simple tool that can be adopted by state/local watershed practitioners for estimating and tracking pollution loads and potential load reductions using best management practices (BMPs) implementation. A decision-support framework was developed and tested, in which the first step was to calibrate and apply an ArcView-based Generalized Watershed Loading Functions (AVGWLF) model to the in-basin drainage areas. An interactive management tool (Poll-Track) was then developed in Microsoft Excel, with significant flexibility to modify the treatment performance and costs of BMPs and also to evaluate the BMP needs for current and future land uses. The tool can now be applied with existing BMPs and site-specific costs for screening and selection of pollution control initiatives in individual watersheds.

Keywords: BEST MANAGEMENT PRACTICES; DECISION SUPPORT TOOL; GWLF/ AVGWLF; HYPOXIA; LONG ISLAND SOUND; NONPOINT SOURCES; NUTRIENTS; POLL-TRACK; TMDL

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193317708X281451

Publication date: January 1, 2008

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  • Water Practice™ publishes peer-reviewed articles and reports focusing on applied water studies. Topics include monitoring, facility operations and maintenance, management, policy, and other issues of interest and concern to water practitioners. The Journal publishes on a monthly to bi-monthly basis and is available online only.
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