A WEB-BASED DSS FOR EROSION CONTROL STRUCTURE PLANNING

A Web-based decision support system called SEDSPEC (Sediment and Erosion Control Planning, Design and SPECification Information and Guidance Tool) (http://www.ecn.purdue.edu/runoff/sedspec) was developed for predicting small watershed peak runoff and designing hydrologic, sediment, and erosion control measures. The SEDSPEC system is comprised of a model, database, and user interface, which are typical components for a model-based Decision Support System (DSS). Two hydrologic models (the Rational Method and TR-55) simulate short-term peak runoff based on site-specific hydrologic soil groups and land uses. The hydrologic models estimate peak runoff using design storm data stored in associated databases. The DSS integrates WebGIS technology to help users estimate watershed boundaries and access a spatial database to obtain land use and hydrologic soil group data for the watershed. As the final output, SEDSPEC calculates dimensions and costs of hydrologic, sediment and erosion control structures based on users’ specifications, and provide structure maintenance information. A case study is provided to demonstrate the use and functionality of the SEDSPEC DSS. This system can be an efficient tool to facilitate a decision-maker’s design and planning procedures.

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