Could Aquifer Storage Help Texas Save Water for Dry Years?

Texas cannot plan for growth by thinking only about how to make more water. We also need to ask where to hold water when it is available and how to recover it when a dry year comes. One tool worth discussing is aquifer storage and recovery, often called ASR.

HOW DOES AQUIFER STORAGE WORK?

The Texas Water Development Board describes ASR as placing water into a suitable aquifer through a well when water is available, then recovering it from that aquifer when it is needed. Think of it as a managed water savings account. It is an established water-management approach, but it is not suitable everywhere and not every idea on a state water plan has been built.

WHAT WOULD TEXAS NEED TO CHECK?

The source and treatment of the water matter. So do the aquifer’s geology, the way injected water interacts with native groundwater and rock, how much can be recovered, water rights, monitoring, and the cost of construction and operation. TWDB notes that pretreatment needs depend on the source water, host rock, and native groundwater. That is why a proposal needs site-specific testing and public review before anyone promises a result.

Surface reservoirs and underground storage need not be an either-or argument. A new managed reservoir could be one option in a particular place; ASR could be another or a complement. TWDB identifies avoided evaporation as one potential benefit of underground storage compared with a surface reservoir. But a site still has to prove its own performance and economics.

WHO PAYS FOR GROWTH?

My view is simple: Texas growth should pay for Texas water growth. If new development and industry increase demand, the water plan should show the supply, storage, treatment, and long-term maintenance costs alongside that growth. That is a proposal for public discussion, not a claim that any particular charge or project is already law.

The next question for a region is practical: what water can be stored, where, at what cost, under what safeguards, and who will be accountable for operating it? A credible answer may use several tools. Let’s compare them in the open before we build.

Sources: Texas Water Development Board, Aquifer Storage and Recovery FAQ — https://www.twdb.texas.gov/innovativewater/asr/faq.asp ; Regional Water Planning FAQ — https://www.twdb.texas.gov/waterplanning/rwp/faq/index.asp