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2015-08-06

New project looks at groundwater depletion

Special to the Courier

The Texas Center for Policy Studies launched today Our Desired Future, a multimedia project to educate Texans on the interconnections between water above and below ground and what Texans can do to keep water flowing for future generations.
Even as the drought has broken across most of Texas, the long-term overdraft of the state's groundwater basins continues unabated. Groundwater accounts for 60 percent of the water used in Texas and a 2014 report from the House Natural Resources Committee recommends that legislators encourage groundwater districts to maximize groundwater production permitting.
Although there is some 500 times more water underground than above in Texas, more groundwater is being produced each year than is being replenished, leading to the overdraft of all of the state's major aquifers.
The problem of groundwater overdraft not only depletes the state's most drought-resistant water resources, it also threatens to diminish the reliability of the state's surface waters. All of the rivers originating within the state emerge from water below ground.
As much as 40 percent of the baseflow of some of Texas' major rivers comes from groundwater in an average year; in drought years, that figure can be as high as 80 percent. Groundwater pumping can permanently invert the relationship between groundwater and surface water, causing surface water to disappear below ground-as illustrated by the Rio Grande near El Paso, where the river now loses six times more water to the underlying aquifer than the aquifer once provided to the river's baseflow. For 300 miles below that region, the Rio Grande is effectively dry.
Despite the strong interconnection of groundwater and surface water, the state manages them as two separate resources. Groundwater is the property of the landowner, while surface water is the property of the State of Texas. The state's 5-year Regional Water Plans and the resulting State Water Plan do not account for the reduction in surface water that is likely to result from increased groundwater production.
To help Texans understand where their water comes from and how the state's water resources can be managed for long-term viability, Our Desired Future will be released as a story series. The state's hydrology and water management is explained through the stories of Texans from different regions of the state, including the Hill Country, the Gulf, the Panhandle, West Texas and the Rio Grande Valley. These multimedia stories feature animation, videos, audio, written essays and photography. All media from the project is freely available for use in outreach and education.
The project also features first-of-its-kind maps of Desired Future Conditions by county for six of the nine major aquifers in the state. Desired Future Conditions are the targets set by Groundwater Management Areas for how much groundwater will remain in 50 years.
The producers are making a 30-minute radio piece freely available for download through the Public Radio Exchange. During the program, listeners meet cave divers who swim into the Trinity Aquifer, visit a farmer who pumps 35 million gallons of groundwater a day and hear from a family who live entirely from the rainwater captured on their roof. The piece is available here: http://www.prx.org/series/34380-our-desired-future
Our Desired Future is a project of the Texas Center for Policy Studies. Our Desired Future can be found at http://www.ourdesiredfuture.com.