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CEE 542: Computational Watershed Hydrology Term Project Progress Report by Yamen M Hoque

This progress report presents the computational analysis of a 400,000-hectare watershed, including land use classification, soil data integration, and creation of Hydrologic Response Units. Future work involves incorporating weather data for SWAT modeling and assessing the impact of climatic disturbances on watershed outflow.

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CEE 542: Computational Watershed Hydrology Term Project Progress Report by Yamen M Hoque

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  1. CEE 542: Computational Watershed Hydrology Term Project Progress Report by Yamen M Hoque 10/08/2009

  2. Used a 30m Raw DEM • Mean elevation 253m, Std. Dev. 21m

  3. Watershed area is approximately 400,000 hectares • Delineated into 43 subbasins • Used a threshold of 1% (4000 hectares)

  4. Landuse classification done based on NLCD 2001 • Dominated by agricultural land type (ranges, pastures, etc) • Some concentrated urban areas • Forests interspersed throughout the watershed

  5. Soil data obtained from SSURGO • Mostly comprised of soils from HSG C & D • Poorly drained

  6. Hydrologic Response Units (HRUs) created • Each HRU is a unique combination of soil type, land cover type and slope • % Threshold of 15/15/20 used for soil/land/slope respectively • Total number of HRUs in watershed: 231

  7. Future Work • Need to incorporate precipitation/temperature data • Data from 13 weather stations (one per county) has been gathered • Once incorporated, SWAT can be run • Some calibration work (not sure about this yet) • Input climatic disturbances such as percentagewise change in precipitation/temperature • Observe how this affects outflow from watershed outlet • Also observe effect on outflow for different subwatershed delineation configurations • Look at effect of land cover changes (if time permits)

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