PHOENIX, Ariz. -- The Colorado River is the lifeblood of the American West, but the viability of the massive river basin is being threatened by climate change.

To plan future water use in the region -- which includes Arizona -- the Central Arizona Project is teaming up with NASA and Arizona State University, to evaluate how climate and land-use changes will affect patterns of hydrology.

Using state-of-the-art satellite imaging, scientists will measure and evaluate how water flows throughout the basin. Professor in the Arizona State University School of Earth and Space Exploration Enrique Vivoni, said their work will help apportion future supplies of Colorado River water.

"How will we, as a society in the western U.S. that depends on this hugely important river basin, adapt to changes that will come to the basin over the course of the next 50 to 100 years?" asked Vivoni.

The Colorado River supplies water to 40 million people in seven U.S. states and Mexico under a system of international treaties, interstate compacts and court decrees. The scientific modeling will identify water-flow patterns in an area where water rights have long been contentious.

The Central Arizona Project, through a system of pipelines and canals, distributes Arizona's share of water from the basin. Mohammed Mahmoud, a senior policy analyst with the agency, said data they're developing now will be critical to future negotiations over water supplies.

"Can we use the most recent, most up-to-date climate information we have available?" asked Mahmoud. "With that, can we explore what the impacts are -- not just in the short term, not just in the next 10 to 20 years -- but long-term to determine, are there patterns that we can expect in the future?"

ASU's Vivoni said each of the three agencies brings a unique skill-set to the project.

"The Colorado River basin is an area of great interest for NASA, obviously for the Central Arizona Project and for ASU," he explained. "And this is a perfect convergence of a federal agency, water management agency, and a university, to work together on a big problem."

Stakeholders in the basin are currently operating under a Drought Contingency Plan. It was last updated in 2019, and a new plan will be renegotiated to go into effect in 2026.

More information is online at 'CAP-AZ.com.' Search for 'DCP.'

Minnesota is credited for having strong wetland protections. But the research community warns the growing presence of factory farms in the Midwest makes it harder to shield these natural resources.

A new report from the Union of Concerned Scientists says 30 million acres of wetlands in the Upper Midwest are at risk of destruction by industrial agriculture and other heavy industries.

The authors said the U.S. Supreme Court's recent decision to strip some federal protections from wetlands accelerates the potential loss.

The Research Director for the Union's Food & Environment program Stacy Woods said because of the role wetlands play in flood mitigation, states in this region are likely to have a harder time limiting damage from a major rain event.

"We know that flooding is a significant issue," said Woods. "It's expensive, and it's getting worse as the climate warms."

While Minnesota's laws might help offset some of the federal impact, the report says neighboring states like South Dakota and Iowa are more vulnerable to wetland loss.

It says priorities of the incoming Trump administration could further complicate protections - but if lawmakers can agree, there could be opportunities in the Farm Bill debate to bolster existing conservation programs.

Wetlands can capture and slow flood waters that threaten homes, but Woods pointed out they do so much more.

"They're often called nature's kidneys, because they provide such a service in cleaning our waterways," said Woods. "But when we dump so much pesticide and fertilizer, and other pollutants onto our fields, that can run off into these wetlands and really impact the wetlands' ability to clean our water."

Meanwhile, researchers say one acre of wetlands provides $745 of flood mitigation benefits to residential homes.

Without wetlands, they say homeowners and taxpayers absorb those costs through the National Flood Insurance Program.




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The most current study from the Environmental Protection Agency estimated more than 143 million Americans are at risk of drinking water tainted with PFAS chemicals, including in Texas.

Water utility companies across the country tested their drinking water for 29 different PFAS compounds. They are known as "forever chemicals," because they do not break down easily in the environment or the body.

Neil Carman, clean air program director of the Lone Star Chapter of the Sierra Club, said the man-made chemicals are found in everyday products.

"Nonstick pans like Teflon, also stain-resistant fabrics, like Gore-Tex and waterproof clothing," Carman outlined. "The biggest source is probably from the firefighting foam."

He pointed out when firefighters use the foam to extinguish a fire, it is left on the ground and seeps into nearby water sources.

Some supporters of President-elect Donald Trump have said they want to revoke or weaken water standards for six PFAS chemicals. According to the Environmental Working Group, it would leave nearly 46 million Americans with no protections.

The EPA said its data is not yet complete but it has already identified PFAS contamination at almost 8,900 sites nationwide, including more than 100 in Texas. Carman noted the chemicals have been linked to multiple health problems.

"They could cause cancer, they disrupt the immune system, they could interfere with pregnancies, they can cause all kinds of health effects," Carman explained. "We're still learning about them but they're not good."

The Texas Commission on Environmental Quality is the state agency charged with PFAS enforcement. Carman added a home water filtration system is one option for curbing some toxic chemicals.

A delegation of New Mexico lawmakers is asking the federal government to quickly resolve long-standing litigation affecting water users in the Rio Grande Basin.

In a 2013 lawsuit, Texas alleged New Mexico farmers were using groundwater previously allocated to Texas. Then in 2022, the two states reached an out-of-court agreement. But the federal government objected and a subsequent U.S. Supreme Court ruling said government consent was needed first.

Andrew Mergen, visiting assistant clinical professor of environmental law at Harvard University, said a lot has changed since the original water compact was signed in 1939.

"This is, in some ways, about growth in New Mexico that has accelerated groundwater pumping in the Rio Grande," Mergen pointed out. "How are you going to manage that groundwater pumping in a way that the compact terms are met?"

New Mexico's U.S. Senators and Representatives have sent a letter to the Departments of Interior and Justice asking for resolution by year's end. Bergen believes it is unlikely but without it, the states and federal government must argue their case at a trial in federal court.

Mergen noted decades-old water allocations in the West were based on what was known at the time. Parties could only guess about population growth and could not anticipate the advent of more oil and gas drilling, increased groundwater crop irrigation and sustained periods of drought, all amid climate change.

"That's what makes this profoundly difficult," Mergen observed. "That's what the rub of this case is, that the compact was negotiated a long time ago. Things change. How do you account for change?"

The Rio Grande Basin is critical to agriculture, industry and the environment, providing irrigation water for nearly 2 million acres of crop and pasture land, supporting the outdoor recreation economy and providing habitat for fish and wildlife.


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