Evaluation of Advective Schemes for Estuarine Salinity Simulations
Publication: Journal of Hydraulic Engineering
Volume 125, Issue 1
Abstract
Several advective transport schemes are considered in the context of two-dimensional scalar transport. To review the properties of these transport schemes, results are presented for simple advective test cases. Wide variation in accuracy and computational cost is found. The schemes are then applied to simulate salinity fields in South San Francisco Bay using a depth-averaged approach. Our evaluation of the schemes in the salinity simulation leads to some different conclusions than those for the simple test cases. First, testing of a stable, but nonconservative Eulerian-Lagrangian scheme does not produce accurate results, showing the importance of mass conservation. Second, the conservative schemes that are stable in the simulation reproduce salinity data accurately independent of the order of accuracy of each scheme. Third, the leapfrog-central scheme was stable for the model problems but not stable in the unsteady, free surface computations. Thus, for the simulation of salinity in a strongly dispersive setting, the most important properties of a scalar advection scheme are stability and mass conservation.
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 125 • Issue 1 • January 1999
Pages: 32 - 46
History
Received: Mar 1, 1996
Published online: Jan 1, 1999
Published in print: Jan 1999
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