Arthur Uhl III has been ranching for 30 years and routinely has the same lament: “It doesn’t rain enough.”
Uhl, who works on his family’s San Angelo-area ranches, needs the rain to grow the grass that feeds his livestock. But in a region that’s prone to megadroughts, he’s had to make changes for sustainability’s sake.
“We meter all of our groundwater posts, for one thing,” he said. “We’ve enclosed most of our tanks. We use precision irrigation systems. And we reuse water when we can.”
The situation has been tough, but it’s about to get a lot worse — for Uhl and ranchers all across the state. This century, Texas could face the driest conditions it has seen in the last 1,000 years, according to a new study from a team of Texas A&M University and University of Texas at Austin researchers.
The study highlighted a slew of looming problems for the state’s water supply. First, climate change will lead to even more megadroughts. In the latter half of the century, those droughts are likely to be worse than any of those previously on record.
Second, the higher temperatures brought about by climate change will lead to more evaporation from the surface lakes that many parts of the state rely on. This problem will be particularly pronounced for Dallas, which relies entirely on surface water for its water supply, the study says.
Third, the state’s population is continuing to grow — from just under 30 million now to a projected more than 50 million in 2070 — meaning the demand for water will go up as the state gets drier.
“We’re warming up the atmosphere; that’s been happening and is projected to make the droughts more severe, but in cities like Austin, Dallas, Houston, the Rio Grande Valley and San Antonio, we know that populations are continuing to grow at a rapid pace,” said Jay Banner, a professor at UT-Austin who co-authored the study.
Merry Klonower, a spokesperson for the Texas Water Development Board, which offers water planning assistance to municipalities, said that each of 16 regional water planning areas throughout the state is required to take into account population projections for the next 50 years when making water supply decisions.
“And if there is a shortage, then the very next step is they have to determine how they are going to meet their water supply needs for that growing population,” she said. “So we have been doing this since the ’90s and it is a very robust process. So the state is well-prepared and is looking at future populations and water supply needs for municipalities.”
But the warnings are alarming to water conservation advocates and ranchers alike.
Uhl, the second vice president of the Texas and Southwestern Cattle Raisers Association, said that severe droughts limit forage growth, and without forage, cattle can’t produce calves — meaning ranchers have to sell them off.
“And so that leads to a shortage of the first step in the supply chain which is…