BASINS 3.0 and SWAT: A Study in the Austin-Travis Lakes Watershed

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BASINS 3.0 and SWATA Study in the Austin-Travis
Lakes Watershed

• Kristina Schneider
• Kristi Shaw
• March 29, 2001

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Texas Regulatory Criteria

• 30 TAC 307.7
• Contact Recreation (E. coli not to exceed 126 per
  100 ml)

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1989 Fecal Coliform Levels Exceeding 126 per 100
ml
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1994 Fecal Coliform Levels Exceeding 126 per 100
ml
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1998 TMDL List of Impaired and Threatened Water
Bodies
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TMDL 303(d) Listed Waters
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BASINS-ASSESS Water Quality (1984)
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Water Quality Standards to Monitor for Urban
Development (30 TAC 216)

• Total Suspended Solids
• Total Nitrogen
• Total Phosphorous
• Chemical Oxygen Demand
• Biochemical Oxygen Demand (BOD)

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ASSESS- BOD Comparisons from 1979 and 1997
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Procedure for modeling with SWAT

• Delineate the watershed for modeling
• Define land use and soil data grids
• Determine the distribution of HRUs based on land
  use and soil data
• Define rainfall, temperature, and weather data
• Write SWAT input files
• Edit input files if necessary
• Setup and run SWAT
• View SWAT Output

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Watershed Delineation
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Created Basin and Subbasins
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Soil Type Setup

• Statsgo Data
• Clip Statsgo the CU boundary
• Appropriate Soil types are selected