A Decision Support Framework to Facilitate Nitrogen Load Reductions in the Long Island Sound (LIS) Watershed
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.
Document Type: Research Article
Publication date: January 1, 2008
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