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dc.contributorPennsylvania State University. Department of Civil and Environmental Engineering-
dc.contributor.authorYeh, Gour-Tsyh (George), 1940--
dc.contributor.authorCheng, Hwai-Ping.-
dc.contributor.authorCheng, Jing-Ru C., 1963--
dc.contributor.authorLin, Hsin-Chi J.-
dc.contributor.authorMartin, William D.-
dc.descriptionTechnical report-
dc.descriptionThis report presents the development of a numerical model simulating water flow and contaminant and sediment transport in watershed systems of one-dimensional river/stream network, two-dimensional overland regime, and three-dimensional subsurface media. The model is composed of two modules: flow and transport. Three options are provided in modeling the flow module in river/stream network and overland regime: the kinematic wave approach, diffusion wave approach, and dynamic wave approach. The kinematic and diffusion wave approaches are known to be numerically robust in terms of numerical convergency and stability; i.e., they can generate convergent and stable simulations over a wide range of ground surface slopes in the entire watershed. The question is the accuracy of these simulations. The kinematic wave approach usually produces accurate solutions only over the region of steep slopes. The diffusion wave approach normally gives accurate solutions over the region of mild to steep slopes. However, neither approach has the ability to yield accurate solutions over the region of small slopes, in which the inertial forces are no longer negligible compared to the gravitational forces. The kinematic wave approach cannot address the problems of backwater effects.-
dc.publisherCoastal and Hydraulics Laboratory (U.S.)-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesTechnical report (U.S. Army Engineer Waterways Experiment Station) ; CHL-98-19.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource-
dc.subjectContaminant and sediment transport-
dc.subjectDarcy's velocity-
dc.subjectDiffusion wave-
dc.subjectGalerkin finite element method-
dc.subjectNewton-Raphson method-
dc.subjectOverland flow-
dc.subjectPicard method-
dc.subjectRichard's equation-
dc.subjectSubsurface flow-
dc.subjectWatershed system-
dc.titleA numerical model simulating water flow and contaminant and sediment transport in WAterSHed systems of 1-D stream-river network, 2-D overland regime, and 3-D subsurface media (WASH123D: version 1.0)-
Appears in Collections:Technical Report

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