Real-Time Dynamic Flood Routing with NWS FLDWAV Model Using Kalman Filter Updating

by D. L. Fread, Natl Weather Service, Silver Spring, United States,
Ming Jin, Natl Weather Service, Silver Spring, United States,



Document Type: Proceeding Paper

Part of: Engineering Hydrology

Abstract:

Dynamic flood routing model based on the four-point implicit finite-difference solution of the complete one-dimensional Saint-Venant equations of unsteady flow are inherently deterministic. Such a model (FLDWAV) developed by the National Weather Service for real-time flood forecasting has been enhanced with a stochastic estimator based on an extended Kalman filter to provide optimal updating capabilities utilizing real-time observed river stages. The stochastic enhancement is described, and selected applications of the enhanced model spanning a wide range of unsteady flows are presented.

Subject Headings: Flood routing | Dynamic models | Unsteady flow | Computer models | Stochastic processes | Mathematical models | Kalman filters

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