Lake Mead’s levels have risen as planned, after a large amount of water was released from the Glen Canyon Dam.
The Glen Canyon Dam forms Lake Powell, the huge Colorado River reservoir that lies between Arizona and Utah.
Nearly half of the U.S. West has emerged from drought this spring, but the welcome wet conditions haven’t entirely replenished the region, scientists said Tuesday.
Hydrologists from the National Oceanic and Atmospheric Administration said deep snowpack across much of the West will bring short-term relief, but the equally deep “bathtub rings” at Lake Powell and Lake Mead reservoirs are a reminder of the long road to bringing supply and demand in balance.
The Colorado River has shaped life as we know it in the southwestern United States. Its water has allowed for explosive population growth and agricultural development in some of the driest parts of the country. But due to overallocation and climate change, the river is drying up.
Three possible scenarios have been mapped out for Lake Powell as the summer months approach.
Lake Powell’s water levels could rise to 3,615.62 feet by the end of July, according to a 24-month report on maximum probable inflow released in April by the U.S. Bureau of Reclamation. This is the best-case scenario mapped out by the bureau.
Encouraging news continues to flow about water levels at Lake Mead. The U.S. Bureau of Reclamation has announced that increased releases from Lake Powell will continue through the end of May.
Water released through the Glen Canyon Dam at Lake Powell flows south as the Colorado River into the Grand Canyon and eventually into Lake Mead. The majority of the water in the Colorado River basin comes from melting snow in the Colorado Rockies, which had record snowfall this year.
During state Assembly testimony on Tuesday, May 2, San Diego County Water Authority General Manager Sandra L. Kerl highlighted the steps taken by the Water Authority and partner water agencies across California to support the Colorado River in the era of climate change.
Kerl joined representatives from the Colorado River Board of California, the Imperial Irrigation District, Metropolitan Water District of Southern California, the California Natural Resources Agency, and the environmental community. A theme throughout the hearing was that California is prepared to do more to help the river, but all seven Basin states must be involved in a consensus-based approach.
“When you ask how California is responding and preparing for the effects of climate change, I offer the San Diego region’s focus on a diversified water supply portfolio as an example of focusing on conservation and water management while also developing new drought-proof supplies,” Kerl told the committee.
Tuesday’s hearing before the state Assembly Committee on Water, Parks, and Wildlife in Sacramento focused on the effects of climate change on the Colorado River and actions California water agencies have taken to address the river’s challenges.
More than 20 years of drought have led to record low elevation levels in lakes Mead and Powell, the two critical reservoirs California and the Lower Basin depend on for their river supplies. While heavy storms this winter and spring improved river conditions, concerns remain over the long-term effects of climate change. Efforts are underway to find lasting, durable solutions for the river.
Kerl highlighted the leadership California has shown in conservation through the 2003 Quantification Settlement Agreement or QSA, which has enabled California to live within its 4.4-million-acre-foot apportionment while helping the U.S. Bureau of Reclamation manage river supplies. At the center of the QSA, is the conserved water transfer agreement between the Water Authority and the Imperial Irrigation District.
“In total, our QSA partnerships have conserved more than 3 million acre-feet of Colorado River water since 2003 and done so in a way that supports California’s critical agricultural economy, funds socio-economic needs, and addresses the environment, most importantly the Salton Sea,” Kerl said. She noted that the QSA is an example for other Basin states to follow in implementing conservation.
Kerl and others expressed hope that Basin states can collaborate to keep the water flowing for all river users.
“I am confident that we will find a shared solution that moves us forward to conserve the water we need to stabilize the system and then look forward to guideline updates,” said California Natural Resources Agency Secretary Wade Crowfoot.
💧🏛️ Testified today to the California State Assembly on Colorado River drought and our state’s proactive efforts to protect the system and California’s water rights. Great hearing! pic.twitter.com/NVSq8wXCnx
— JB Hamby (@GotitaJB) May 2, 2023
His comments referenced upcoming discussions on the river’s future operating guidelines, which take effect in 2026.
Colorado River Board of California Chairman JB Hamby from the Imperial Irrigation District said, “California is working with our in-state stakeholders, tribes, and Mexico via the United States to be able to deal with this in the next short-term basis and the long term.”
As climate change reduces flows on #CoRiver, it's only through collaboration & partnerships that we'll succeed. By 2026, we must negotiate new long-term agreements to ensure the river’s sustainability for generations to come. – GM @adelh2o at Assembly Water Parks & Wildlife Cmte pic.twitter.com/9uQp3fF83G
— MWD of SoCal (@mwdh2o) May 2, 2023
Metropolitan Water District General Manager Adel Hagekhalil added, “Working together, we must develop equitable, realistic solutions that reduce our collective reliance on the river.”
During her testimony, Kerl told the committee that any solutions must uphold the Law of the River, the priority right system and California’s senior rights. “It’s critical that Reclamation consider both the near-term and future operations of the river by building on the foundation of the laws, court decisions, compacts and agreements that have come before,” she said.
Historic snowfall across the Rocky Mountains is helping recharge some of the country’s biggest reservoirs and provide – briefly – some much-needed breathing room for the oversubscribed Colorado River.
Forecasts say the melting snow flowing into Lake Powell via the Colorado River and its tributaries could hit 177% of average this year, a major boost at a time when lake levels had hit historic lows.
An extra pulse of water has been sent through the Grand Canyon this week. The Bureau of Reclamation is running a “high-flow experiment” at Glen Canyon Dam in northern Arizona, which means a big release of water designed to move and redeposit sand and sediment will make its way downstream from the dam. This experiment is the first since 2018, and comes in response to forecasts for an above average spring snowmelt in the Rocky Mountains.
A large release of water from Lake Powell began Monday morning. It’s water that will eventually end up in Lake Mead near Las Vegas after a two-day journey through the Grand Canyon where it will help restore sandbars and beaches while moving sediment downriver.
