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Counties in Region:
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WILLIAMSON, WHARTON, TRAVIS, SAN SABA, MILLS, MATAGORDA, LLANO, HAYS, GILLESPIE, FAYETTE, COLORADO,
BURNET, BLANCO, BASTROP
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Major Cities:
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Austin
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Population 2000:
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1,041,948
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Population 2050:
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2,107,106
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Total Water Use, 2000:
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979913 Acre-Feet
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Total Water Use, 2050:
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1123307 Acre-Feet
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Primary Rivers:
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Colorado, Colorado-Lavaca, Lavaca-Brazos
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Major Aquifers:
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Trinity, Edwards (BFZ), Carrizo-Wilcox, Gulf Coast
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Annual Precipitation:
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24-48 Inches
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Net Evaporation:
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20-44 Inches
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Regional Planning Activity Information From
The Teaxs Water Development Board
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SUPPLY 1995
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DEMAND 2000
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DEMAND 2050
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SOURCE
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PERCENT
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SECTOR
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ACRE-FEET
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PERCENT
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SECTOR
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ACRE-FEET
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PERCENT
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Groundwater
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26%
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Irrigation
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588635
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60.1%
|
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Irrigation
|
479453
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42.7%
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Surfacewater
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74%
|
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Manufacturing
|
33833
|
3.5%
|
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Manufacturing
|
66962
|
6.0%
|
|
|
|
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Livestock
|
14275
|
1.5%
|
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Livestock
|
14275
|
1.3%
|
|
|
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Mining
|
34554
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3.5%
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Mining
|
34820
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3.1%
|
|
|
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Municipal
|
227616
|
23.2%
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Municipal
|
409297
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36.4%
|
|
|
|
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Power
|
81000
|
8.3%
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|
Power
|
118500
|
10.5%
|
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- Rapid population growth in Austin and outlying areas will more than double present population between 1995
and 2050. Total water use, however, is not projected to increase due to declines in irrigation water use.
- Out-migration from Austin and San Antonio to counties like Llano, Blanco, and Gillespie has put a sudden
demand on limited groundwater resources from the Trinity Aquifer.
- Population and development over the recharge zone of the Edwards Aquifer in the Austin area have impacted
water quality in aquifer-fed streams like Barton Springs.
- Oil-field activity and natural salt deposits have affected water quality in the Middle Colorado River Basin, while
urban runoff is believed to have contaminated fish with chlordane in Town Lake in the City of Austin.
- In the Lower Colorado River Basin, high nutrient levels, low dissolved oxygen content, and possible concerns
over dissolved metals have impacted water quality.
- Bay and estuary flow needs and in-stream flow needs below Lake Travis will require careful management of
releases from the lakes in the Austin region.
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