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Parameter Optimization of Dynamic Routing Models

by D. L. Fread, Natl Weather Service Hydrologic Res, Lab, Silver Spring, MD, USA,
J. M. Lewis, Natl Weather Service Hydrologic Res, Lab, Silver Spring, MD, USA,



Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract:

The methodology utilizes approximate cross-sectional properties represented by separate power functions for channel and floodplain, and a very efficient optimization algorithm for determining the Manning n as a function of either stage or discharge. Essential data required for implementing the methodology are stage hydrographs at both ends of each routing reach and a discharge hydrograph at the upstream end of each river. Specific cross-sectional properties at key locations, e. g. , bridges, dams, unusual constrictions, also can be utilized within the optimization methodology. The methodology was tested on 1275 miles of major rivers and their principal tributaries in the U. S. with promising results.

Subject Headings: Optimization models | Flood routing | Rivers and streams | Dynamic models | Water discharge | Hydrographs | Cross sections

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