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Calibrating Shenandoah Watershed SWAT Model Using A Nonlinear Groundwater Algorithm

dc.contributor.advisorBrubaker, Kaye L.en_US
dc.contributor.authorWang, Yanen_US
dc.date.accessioned2011-07-06T06:02:34Z
dc.date.available2011-07-06T06:02:34Z
dc.date.issued2011en_US
dc.identifier.urihttp://hdl.handle.net/1903/11581
dc.description.abstractThis study contributes to a project with the Interstate Commission on the Potomac River Basin to build a model of the Potomac watershed using the Soil Water Assessment Tool (SWAT). The 2,937 mi2 Shenandoah watershed represents about 40% of the Potomac Basin by area. The model subdivides the Shenandoah watershed into 28 subwatersheds and 489 hydrologic response units. SWAT's linear-reservoir groundwater algorithm is modified into a new non-linear method. Modeled flows are compared to observations (dating from 1996 to 2006) at 15 USGS stream gages. The model is auto-calibrated using the Parameter Estimation Software (PEST), experimenting with options to improve model performance. The best model results are obtained by applying ordinal weights to the observation groups, decreasing from headwaters to outlet, and pre-calibrating the roughness coefficients using empirical equations. The calibrated model will contribute to understanding hydrological processes and predicting the effects of land use and climate change in the watershed.en_US
dc.titleCalibrating Shenandoah Watershed SWAT Model Using A Nonlinear Groundwater Algorithmen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentCivil Engineeringen_US
dc.subject.pqcontrolledCivil Engineeringen_US
dc.subject.pqcontrolledWater Resource Managementen_US
dc.subject.pquncontrolledGISen_US
dc.subject.pquncontrolledHYDROLOGIC MODELINGen_US
dc.subject.pquncontrolledPESTen_US
dc.subject.pquncontrolledSWATen_US
dc.subject.pquncontrolledWATERSHEDen_US


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