Texas Surface Water Resources
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Texas Surface Water Resources. 15 major river basins. 191,000 miles of rivers and streams. 7 major estuaries. ~ 200 springs. 6 million acres of bottomland hardwoods and forested wetlands. Importance of Aquatic Ecosystems.

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Texas Surface Water Resources

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Texas surface water resources

Texas Surface Water Resources

15 major river basins

191,000 miles of rivers and streams

7 major estuaries

~ 200 springs

6 million acres of bottomland hardwoods and forested wetlands


Importance of aquatic ecosystems

Importance of Aquatic Ecosystems

  • 191,000 miles of rivers and streams in Texas provide habitat for 255 species of fishes

  • With over 150 species of native freshwater fishes, Texas ranks among the most biologically diverse states

  • Texas ranks 2nd nationally in terms of angler days and the amount of money spent on fishing

  • Sportfishing generates almost $6.4 billion per year


Threats to aquatic ecosystems

Threats to Aquatic Ecosystems

  • At least five native Texas fishes are now extinct and three more are extirpated throughout the Texas portion of their range

  • ~20% of Texas fishes are threatened with extinction or extirpation from the Texas portion of their range

  • With 31 state and federally-listed endangered aquatic animals, Texas ranks in the top five states for numbers of endangered aquatic species


Threats to aquatic ecosystems1

Threats to Aquatic Ecosystems

  • 29 watersheds in Texas identified as critical for conserving at-risk fish and mussel species

  • Of 281 springs that were identified as historically significant, more than 80 have failed completely

  • With over half of the state’s water needs satisfied by groundwater, a number of the state’s largest springs continue to be at risk

  • Population of Texas predicted to double between the year 2000 and the year 2050.


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