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Sustain - an Epa Bmp Process and Placement Tool for Urban Watersheds

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To assist stormwater management professionals in planning for implementation of best management practices (BMPs), efforts have been under way by the U. S. Environmental Protection Agency (EPA) since 2003 to develop a decision-support system for placement of BMPs at strategic locations in urban watersheds. This tool will help develop, evaluate, select, and place BMP options in various watershed scales based on cost and effectiveness. The system is called the S ystem for U rban S tormwater T reatment and A nalysis IN tegration (SUSTAIN). SUSTAIN has seven key components: framework manager, ArcGIS interface, watershed module, BMP module, optimization module, post-processor, and Microsoft Access database. They are integrated under a common ArcGIS platform. The completed Phase 1 work included a framework design with all major components in place. The ongoing Phase 2 work will expand the capabilities and functionalities of the system. In addition to describing the background of the SUSTAIN development and framework components, presented in this paper is a SUSTAIN's preprocessing tool to facilitate BMP selection and configuration. Also discussed are adopted simulation processes for watershed runoff computation and routing through BMPs; an approach to address dual objectives of pollution and flood control; optimization search algorithms; and a multi-tier optimization strategy to develop large watershed-scale solutions from information developed in small-scale watersheds. Finally in this paper, the issue of balancing computational efficiency during the optimization process with the process simulation details is described.
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Document Type: Research Article

Publication date: 01 October 2007

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