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Limitations of Level-Pool Routing in Reservoirs

by D. L. Fread, Natl Weather Service Hydrologic, Research Lab, United States,
George F. McMahon, Natl Weather Service Hydrologic, Research Lab, United States,
Janice Lewis, Natl Weather Service Hydrologic, Research Lab, United States,



Document Type: Proceeding Paper

Part of: Computerized Decision Support Systems for Water Managers

Abstract:

Storage routing is defined for purposes of this study as any routing technique which expresses reservoir storage as a single-valued function of stage, and hence it is sometimes termed 'level-pool' routing. The NWS DAMBRK model was modified by the authors for use in comparing reservoir discharge and stage hydrographs produced by dynamic (one-dimensional St. Venant continuity and momentum equations) and level-pool routing techniques. The objective of this effort is to determine the degree to which level-pool routing approaches dynamic routing for dimensionless reservoir and inflow hydrograph characteristics. Though error-characteristic relationships have not yet been fully derived, this paper documents case studies and sensitivity analyses.

Subject Headings: Reservoirs | Sensitivity analysis | Hydrologic models | Hydrographs | Water storage | Flood routing | Mathematical models

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