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CEE 549 Term Project: Investigating the Effect of Scale on SWAT Modeling by Yamen M Hoque

CEE 549 Term Project: Investigating the Effect of Scale on SWAT Modeling by Yamen M Hoque. Introduction & Objective Long term stresses such as land use/land cover change and climate change have an effect on hydrologic systems Modeling effect of such stresses is impacted by the model scale

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CEE 549 Term Project: Investigating the Effect of Scale on SWAT Modeling by Yamen M Hoque

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  1. CEE 549 Term Project: Investigating the Effect of Scale on SWAT ModelingbyYamen M Hoque Introduction & Objective Long term stresses such as land use/land cover change and climate change have an effect on hydrologic systems Modeling effect of such stresses is impacted by the model scale The effect of spatial scale on hydrologic modeling using the Soil & Water Assessment Tool (SWAT) model will be studied by application to a study watershed Hypothetically, a threshold spatial scale value should exist beyond which increasing scale does not have any effect Attempt will be made to quantify this threshold value for the study area

  2. Study Area • Upper Wabash Watershed • Located along north-east Indiana/north-west Ohio • Total drainage area 1,047,990 acres • Spans ten counties in IN, three in OH • Land use is mostly cropland and pasture Courtesy: US EPA Surf Your Watershed Webpage

  3. Required Input Data for SWAT Modeling • Digital Elevation Model (DEM) • Land use/Land cover data • Soil data • Historical precipitation and temperature data from nearby weather stations • Historical streamflow data if model predicted streamflow is to be calibrated • Data on agricultural practices applied in the study area (not a requirement)

  4. Methodology • Delineate Upper Wabash watershed from DEM • Prepare input data to be used with SWAT • Run SWAT for study area • Examine model output; calibrate/validate if required • Examine effect of induced stresses on model output • Induced stresses include percent changes in precipitation, mean and standard deviation of temperature, land use/ land cover changes, etc • Study how the effect of such stresses change with model spatial scale, e.g. from sub watershed scale to watershed scale

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