Accuracy of Hydrodynamic Modeling of Flood Detention Reservoirs
Publication: Journal of Hydrologic Engineering
Volume 12, Issue 2
Abstract
Hydrodynamic modeling of flood detention reservoirs is an effective tool to evaluate reservoir performance, to plan modifications, and to design new reservoirs. The one-dimensional (1D) Saint Venant equations (SVE) are suitable to simulate the standing waves and other degenerations that occur in the reservoirs. The accuracy of these simulations depends on the Courant numbers used in the simulations. Consequently, the use of an appropriate time step for a specific grid size is crucial for the accuracy of the solution. A series of numerical experiments were performed and compared to observed data to develop time step criteria for solving the 1D SVE using the Abbott-Ionescu scheme. The time step was normalized by the wave celerity to make it problem dependent. The new time step criteria were evaluated on a different reservoir and proved to be adequate for selecting a time step for reservoir modeling. The criteria could readily be integrated in existing models to be used in an adaptive time stepping scheme.
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 12 • Issue 2 • March 2007
Pages: 225 - 230
Copyright
© 2007 ASCE.
History
Received: Apr 8, 2005
Accepted: Jun 22, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
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