Diverted, drained and dwindling: What’s the fate of New Mexico’s Rio Grande?

Century-old water rights and climate change means the river may never flow through many communities year-round again.

 

In March 2019 the Rio Grande river bed was still dry in Las Cruces, New Mexico. Historically, irrigation from the river began in February.

This story was originally published by the Guardian as part of their two-year series, This Land is Your Land, examining the threats facing America’s public lands, with support from the Society of Environmental Journalists, and is republished by permission.

Imagine the world without its most famous rivers: Egypt without the Nile, or London without the Thames. In Las Cruces, New Mexico, residents don’t have to envision the West without the Rio Grande – it runs dry in their city almost every single year.

But this isn’t its natural state.

Isaac Melendrez, who was born near Las Cruces in 1934 and contributed to an oral history of the Rio Grande, remembered swimming in the river with his family as a child, while throngs of birds soared overhead. During the rainy season, the river’s floodwaters sounded like trains. Now?

“It’s shrunk just about as much as it can,” Melendrez said. “I don’t know what else they can take from it.”

In the past, the Rio Grande would run through Las Cruces for the irrigation season from February to October. But last year, the river didn’t flow until March, and was dry by September. In 2021, the Elephant Butte Irrigation District (Ebid), in charge of measuring and releasing water to Las Cruces from upstream dams, estimated that water levels will be so low they won’t arrive until June and it will probably be gone again at the end of July.

A finite amount of water flows through the Rio Grande every year, so when there are shortages, every city along the river is affected. Due to climate change, hotter and drier seasons are reducing the snowpack that melts to feed the Rio Grande, and rising temperatures are increasing evaporation from the reservoirs. Because of this, the river has had just seven years with a “full supply” of water in the past 20, and only two in the past decade.

“With the lessened snowpack and the depletion of water resources across the southwest, we’re just stacking problems on top of other problems.”

“With the lessened snowpack and the depletion of water resources across the southwest, we’re just stacking problems on top of other problems,” says Las Cruces city councilor Gabe Vasquez. “Every living thing that depends on having water in the desert suffers as a result.”

The Rio Grande’s flow was always variable, but drying up completely was an extraordinary event until the 1890s. When it began to dry up regularly, due to upstream agricultural development, Congress authorized a series of projects, spanning decades, to control where and when the water runs. For example, dams release carefully calculated amounts of water to irrigate the green belt of farms that stretch down it.

In Las Cruces, the Rio Grande’s flow is diverted and drained, flooding into pecan orchards and feeding crops like onions, corn and famously peppery green chiles, for which the state is known. Here, most of the water is owned by irrigators through a century-old system called “water rights.”

These were granted on a first come, first served basis to the farmers and ranchers who settled the state, and the oldest rights are prioritized when the Ebid allocates water every year. Despite making up about 2.4% of New Mexico’s GDP, the agriculture and processing industry receives three-quarters of the state’s surface and groundwater.

Which means in Las Cruces, when the growing season ends, nothing is left in the river bed.

“When the river is flowing during those summer months … our community comes out in droves to float the river, to fish the river, to enjoy picnics by the river, to birdwatch, to swim,” says Vasquez. “The type of quality of life that anyone living next to a body of water should have, we miss out on for the majority of the year because we don’t have that source of recreation.”

The Chihuahuan desert, where Las Cruces is located, is the most diverse desert in the western hemisphere, and humans aren’t the only ones vying for water in the arid landscape.

The Rio Grande used to provide water on a bell curve, with powerful floods in the spring and summer and lower and slower flows in the winter. Now the dams release about 20% of what naturally occurred in the river’s peak months, and species that spent millions of years adapting to the first cycle struggle to survive on this one.

Cottonwood trees evolved to release their seeds in time with spring floods that would wipe out existing vegetation and clear land for them to take root. Without this advantage, cottonwood populations have dwindled, and invasive species like salt cedar, which shed their seeds year-round, monopolize their habitat instead.

The southwestern willow flycatcher is an endangered species. River and stream impoundments, groundwater pumping and overuse of riparian areas have altered up to 90% of the flycatcher’s historical habitat.

Pools of sitting water from the floods also attracted insects, which attracted the southwestern willow flycatcher to nest and feed their young. Due to steady riparian habitat loss, they were classified as endangered in 1995.

“It’s all connected, right? It’s a web,” says Beth Bardwell, former director of conservation, Audubon New Mexico. “And here on the Rio Grande, we’ve basically begun to take out one web strand after another until it’s a really simplified system, and it can’t sustain a whole lot any more.”

Of the 27 native fish species originally found in this stretch of the Rio Grande, only 14 remain. Some manage to survive in irrigation drains when the river isn’t running, but most live in the reservoirs above Las Cruces, swimming down the river when the dams open up and dying when they’re shut off again.

“The river dries up, and if you go look in the irrigation ditches after that happens, you’ll see a lot of dead or dying fish,” says Kevin Bixby, executive director of the Southwest Environmental Center. “I mean, it’s just like a massacre.”

Barring drastic changes to New Mexico’s century-old water rights system and agricultural identity, the Rio Grande will never flow year-round in Las Cruces again.

“More people are realizing that the status quo is not going to be good for anybody in the future.”

But climate change makes the river’s plight more visible, which could be a tipping point in political will, says Vasquez. “More people are realizing that the status quo is not going to be good for anybody in the future.”

As residents live, run, bike and recreate along an empty river bed for longer stretches of the year, Bixby urges them to remember that it’s their river, too, regardless of prior historical or legal arrangements.

“That’s the starting point,” he says. “And then all the complications are, you know, you can get through them, if you just hold on to the idea that it’s my river, too, and it ought to be different. It ought to be better.”

Di Minardi is a co-founder of Slight North and a travel writer based in New Mexico. Email High Country News at [email protected] or submit a letter to the editor.

High Country News Classifieds
  • EXECUTIVE DIRECTOR
    Eugene, Ore. nonprofit Long Tom Watershed Council is seeking a highly collaborative individual to lead a talented, dedicated team of professionals. Full-time: $77,000 - $90,000...
  • GIS SPECIALIST
    What We Can Achieve Together: The GIS Specialist provides technical and scientific support for Geographic Information System (GIS) technology, data management, and visualization internally and...
  • LOWER SAN PEDRO PROGRAM MANAGER
    What We Can Achieve Together: The Lower San Pedro Program Manager directs some or all aspects of protection, science, stewardship and community relations for the...
  • FOREST RESTORATION SPATIAL DATA MANAGER
    What We Can Achieve Together: The Forest Restoration Spatial Data Manager fills an integral role in leading the design and development of, as well as...
  • WATER PROJECTS MANAGER, SOUTHERN AZ
    What We Can Achieve Together: Working hybrid in Tucson, AZ or remote from Sierra Vista, AZ or other southern Arizona locations, the Water Projects Manager,...
  • SENIOR STAFF THERAPIST/PSYCHOLOGIST: NATIVE AMERICAN STUDENT SPECIALIST
    Counseling Services is a department strategically integrated with Health Services within the Division of Student Services and Enrollment Management. Our Mission at the Counseling Center...
  • THE NATURE CONSERVANCY IS HIRING A LOCAL INITIATIVES COORDINATOR
    The Nature Conservancy in Wyoming seeks a Local Initiatives Coordinator to join our team. We're looking for a great communicator to develop, manage and advance...
  • LAND AND WATER PROTECTION MANAGER - NORTHERN ARIZONA
    We're Looking for You: Are you looking for a career to help people and nature? Guided by science, TNC creates innovative, on-the-ground solutions to our...
  • SENIOR CLIMATE CONSERVATION ASSOCIATE
    The Greater Yellowstone Coalition (GYC) seeks a Senior Climate Conservation Associate (SCCA) to play a key role in major campaigns to protect the lands, waters,...
  • EXECUTIVE DIRECTOR
    The Southern Nevada Conservancy Board of Directors announces an outstanding opportunity for a creative leader to continue building this organization. SNC proudly supports Nevada's public...
  • CORTEZ COLORADO LOT FOR SALE
    Historic tree-lined Montezuma Ave. Zoned Neighborhood Business. Build your dream house or business right in the heart of town. $74,000. Southwest Realty
  • ENVIRONMENTAL AND CONSTRUCTION GEOPHYSICS
    - We find groundwater, buried debris and assist with new construction projects for a fraction of drilling costs.
  • PHILANTHROPY COORDINATOR
    Founded by sportsmen and women in 1936, the Idaho Wildlife Federation (IWF) is a statewide nonprofit dedicated to protecting, conserving, and enhancing Idaho's natural resources,...
  • STRAWBALE HOME BESIDE MONTEZUMA WELL NAT'L MONUMENT
    Straw Bale Home beside Montezuma Well National Monument. Our property looks out at Arizona fabled Mogollon Rim and is a short walk to perennial Beaver...
  • ATTORNEY AD
    Criminal Defense, Code Enforcement, Water Rights, Mental Health Defense, Resentencing.
  • LUNATEC HYDRATION SPRAY BOTTLE
    A must for campers and outdoor enthusiasts. Cools, cleans and hydrates with mist, stream and shower patterns. Hundreds of uses.
  • LUNATEC ODOR-FREE DISHCLOTHS
    are a must try. They stay odor-free, dry fast, are durable and don't require machine washing. Try today.
  • PROFESSIONAL GIS SERVICES
    Custom Geospatial Solutions is available for all of your GIS needs. Affordable, flexible and accurate data visualization and analysis for any sized project.
  • A CHILDREN'S BOOK FOR THE CLIMATE CRISIS!!
    "Goodnight Fossil Fuels!" is a an engaging, beautiful, factual and somewhat silly picture book by a climate scientist and a climate artist, both based in...
  • THE MAGICAL UNIVERSE OF THE ANCIENTS: A DESERT JOURNAL
    Bears Ears, Chaco Canyon, and other adventures in the Four Corners area. 60 photos and lively journals. Purchase hc $35 or pb $25 from bigwoodbooks.com...