Approximately what percentage of Texas precipitation returns to the atmosphere by evapotranspiration?

Study for the Texas Wastewater D Test. Use flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

Approximately what percentage of Texas precipitation returns to the atmosphere by evapotranspiration?

Explanation:
Evapotranspiration is the combination of evaporation from soil and water surfaces and transpiration from plants. In Texas, warm temperatures and lots of sunshine drive high evaporation, and abundant vegetation adds substantial plant transpiration, so a large portion of precipitation is returned to the atmosphere rather than becoming runoff or groundwater recharge. The commonly cited estimate is about 89 percent of Texas precipitation moving back to the atmosphere through ET, leaving the remainder for runoff, recharge, and storage. The other options don’t fit because 50% underestimates the ET share in Texas, 10% is far too small, and 99% would leave almost no water for any other pathways.

Evapotranspiration is the combination of evaporation from soil and water surfaces and transpiration from plants. In Texas, warm temperatures and lots of sunshine drive high evaporation, and abundant vegetation adds substantial plant transpiration, so a large portion of precipitation is returned to the atmosphere rather than becoming runoff or groundwater recharge. The commonly cited estimate is about 89 percent of Texas precipitation moving back to the atmosphere through ET, leaving the remainder for runoff, recharge, and storage. The other options don’t fit because 50% underestimates the ET share in Texas, 10% is far too small, and 99% would leave almost no water for any other pathways.

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