Author(s): R. W. Kilgren; J. S. Kobor; J. A. Zyserman; R. B. Allan; S. Agahi; M. Butts; J. K. Larsen
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Keywords: No Keywords
Abstract: The MIKE FLOODWATCH real-time flood forecasting system, developed by DHI Water & Environment (DHI), has been selected by San Diego County (County) and implemented by DHI to provide early warning of potential flood risk within the San Luis Rey River watershed. The forecast system utilizes rainfall measurements from the County's Automatic Local Evaluation in Real Time (ALERT) rain gage network and rainfall forecasts from the National Weather Service (NWS) to provide precipitation input to a lumped-parameter hydrologic model. The hydrologic model simulates the distribution of precipitation as evapotranspiration, overland flow, interflow, and baseflow components and provides inflows to a one-dimensional hydraulic model. The hydraulic model consists of a river network comprised of the San Luis Rey River and six major tributaries, and utilizes measured cross section geometries defining the river channel and floodplain topography. The models were calibrated to measured reservoir water-level data and to discharge and water-level data from three United States Geological Survey (USGS) stream gages on the San Luis Rey River for three historical flood events that occurred between 1983 and 2008.
Year: 2009