Land Use and Urban Recharge in the Brushy Creek Watershed
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Transcript of Land Use and Urban Recharge in the Brushy Creek Watershed
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Land Use and Urban Recharge in the Brushy Creek Watershed
Jonathan Snatic
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Urban Recharge
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Urban Recharge
Leaking water mains and sewers
Infiltration of excess irrigation
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Brushy Creek Basin
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Land Use 1992
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Land Use 2001
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Contributing Zone
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LCRA- municipal supply
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Llano Uplift
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Llano Uplift
Llano RiverPedernales River
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(87Sr/86Sr)MIX = (87Sr/86Sr)A ( fA) (SrA/ SrM) + (87Sr/86Sr)B (1-fA) (SrB/SrA)
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Brushy Creek Basin
Lake Creek Mason Creek
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• Can determine the urban recharge component to base flow in the Brushy Creek Basin.– Sampling– 2 component mixing model
• Is there a correlation between urban recharge and land use in the sampled watersheds?– Delineate sampled watersheds – Compare land use in watersheds
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30m DEM
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NHD Flowlines
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Flow Accumulation
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World Map
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Sample Locations- Point Delineation
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Watersheds
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Land Use
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Urban vs. Rural Land Use
Urban
• 100- Single Family Res.
• 300- Commercial
• 400- Office
• 530- Misc. Industrial
Rural
• 900- Undeveloped
• 160- Large Lot Single Family
• 910- Agricultural
• 710- Parks
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30 40 50 60 70 80 90 1000
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R² = 0.984303734542969
Correlation
% Urban Recharge in Base Flow
% U
rban
Land
Use
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Questions?