LUBBOCK (CBSDFW.COM/AP) — Amid record-shattering rainfalls and flooding, it’s hard for Texans to think of something like a drought. The fact, however, remains: It will be a problem in the near future. Planners speculate that with Texas’ booming population, preparation for a drought it something we should be taking more action on.
Three trillion gallons of water gushed from swollen Texas rivers into the Gulf of Mexico in May, and another 2 trillion gallons will likely evaporate from state reservoirs by year’s end. Combined, the lost water would be enough to serve Texas’ booming population for an entire year. If widely implemented, aquifer storage and recovery would be among the major additions to the state’s water infrastructure since scores of reservoirs were built following the historic drought of the 1950s.
Aquifers are naturally occurring underground layers of rock that can hold vast amounts of water, which can be brought to the surface by pumping or through natural means, such as springs. Some are replenished easily through natural means, such as streams and seepage, while others recharge more slowly but can be replenished manually with pumped-in water. One major benefit of aquifers is that their water doesn’t evaporate, which makes them an ideal water source in warmer climates.
Texas has only three of the nation’s 133 aquifer storage and recovery facilities, but studies are underway to determine where new ones could be built in the state, which had its driest year ever in 2011, causing lakes to dry up and forcing many cities to heavily restrict water use.
The pumping stations, which can inject water into aquifers during wet times and withdraw it when needed, have been widely used in warm climates such as Las Vegas and Tampa, where precious amounts of surface water would be lost to evaporation. In Texas — the nation’s second most populous state — aquifer pumping represents a relatively quick option to help meet the fast-growing demand for water. While reservoir construction can take decades to complete, aquifer facilities require about half a decade.
And for Texas, time is a major factor…
Its population is expected to grow by 82% in the next half century, and its water needs by more than 40% by 2060. With enough pumping facilities, the state could draw on an estimated storage capacity of about 163 trillion gallons — or more than 15 times its current drinking water reservoir capacity — in aquifers, according to water development board data.
San Antonio is one of the few places in Texas that uses the method. The San Antonio Water System paid $210 million to open its facility, which for the last decade has been pumping water from the naturally recharging Edwards Aquifer to another aquifer about 20 miles away through an underground, 60-inch pipe. The Carrizo Aquifer, which lies deeper than the Edwards and where the water moves more slowly, has taken in about 1 billion gallons of water since the start of May.
At least 20 Texas water entities are considering the idea, including the one for Tarrant County, which is home to about 1.7 million residents and the city of Fort Worth.
Utilizing aquifers may not be possible for parts of Texas.
“It all depends on the formations that you’re dealing with. It is really very location-specific,” said Aubrey Spear, the director of water utilities in Lubbock. That agency is researching a plan to pump water into the Ogallala Aquifer, which is one of the world’s largest and sits beneath eight states.
(©2015 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)