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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.descriptionTechnical report-
dc.descriptionThis report presents the development of a numerical model simulating water flow, contaminant transport, and sediment transport in watershed systems. 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 with the gravitational forces. The kinematic wave approach cannot even address the problems of backwater effects. On the other hand, a dynamic wave approach, having included all forces, can theoretically have the potential to generate accurate simulations over all ranges of slopes in a watershed.-
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-98-15.-
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.subjectManning's equation-
dc.subjectOne-dimensional river/stream network-
dc.subjectOverland flow-
dc.subjectRichard's equation-
dc.subjectSubsurface flow-
dc.subjectWatershed system-
dc.titleA numerical model simulating flow, contaminant, and sediment transport in watershed systems (WASH12D)-
Appears in Collections:Technical Report

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