Why is the Colorado River not filling Lake Mead?

Rising temperatures due to climate change have sapped more than 10 trillion gallons of water from the Colorado River over the last two decades, enough water to completely fill Lake Mead from top to bottom, according to a recent study from researchers at UCLA.



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What happens if Lake Mead dries up forever? If Lake Mead were to run out of water, the Hoover Dam would no longer be able to generate power or provide water to surrounding cities and farms. The Colorado River would essentially stop flowing, and the Southwest would be in a major water crisis.

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Climate change, a rising population, and unsustainable consumption of water in the southwest are threatening the very existence of the Colorado River that's been running through the center of the Grand Canyon for six million years.

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“Although every drop counts, the reality is that the rain we received from Tropical Storm Hilary and runoff into the tributaries that enter Lake Mead as well as reduced releases from Hoover Dam — due to a decrease in downstream demand — has had some minor impact on the lake's elevation,” according to U.S. Bureau of ...

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Lake Mead expected to have gained 20 feet of water by end of 2023. By the end of the year, the water level at Lake Mead is expected to be at least 20 feet higher than it was in January, according to a Bureau of Reclamation forecast released this week.

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Hoover Dam, a concrete-arch gravity dam, captures water from the Colorado River and fills Lake Mead. At capacity (1,221.4 feet above sea level), the lake is the nation's largest reservoir, able to contain 28.9 million acre-feet of water covering about 248 square miles.

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Record snowfall in the West wasn't enough to alleviate drought impacting Lake Mead. The record snowfall in the West wasn't enough to permanently alter the course of the drought impacting Lake Mead. FOX Weather's Robert Ray reports on the ongoing water issues and the Colorado River.

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As crazy as it sounds, engineers say the idea is technically feasible. It would involve building a system of dams and pipelines to move the water uphill across multiple states over the Continental Divide. Gravity would then work in our favor to drop the water down to the Colorado River watershed.

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The tops of a few cottonwood trees begin to poke out of shrunken water of Lake Powell in Glen Canyon National Recreation Area, Utah, in this 2022 photo. Lakes Powell and Mead, the depleted symbols of the Colorado River's water crisis, are unlikely to ever fill again, several water experts say.

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Lake Mead's water level continues to fall to historic lows, bringing the reservoir less than 150 feet away from “dead pool” — so low that water cannot flow downstream from the dam. The loss of water entirely from this source would be catastrophic.

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Did Tropical Storm Hilary Affect Lake Mead Water Levels? Lake Mead's water levels, at a record low last year due to ongoing drought, rose a bit during heavy rainfall from Tropical Storm Hilary. But rain isn't the lake's primary source of water.

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Lake Mead water levels up after snowy winter, former Hurricane Hilary. Lake Mead water levels were at record low levels last summer but snow over the winter and former Hurricane Hilary helped restore some water to the basin.

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While recent rainfall at Lake Mead has raised its water levels minimally, the difference is not substantial enough to make up for the lake's losses. Experts attribute low water level projections to several factors. For one, drought conditions appear to be long-lasting; it's unlikely that the climate will recover soon.

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If the Hoover Dam shuts down, it will have a ripple effect in the states of Nevada, Arizona, and California. There will be less water to go around, power will have to come from less clean sources, and all industries will be impacted some way or another.

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California — with the largest allocation of water from the river — is the lone holdout. Officials said the state would release its own plan. The Colorado River and its tributaries pass through seven states and into Mexico, serving 40 million people and a $5 billion-a-year agricultural industry.

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As mentioned, it's possible for the water level in Lake Mead to drop to the point where the dam cannot generate hydroelectric power. However, it's very unlikely that the lake would completely run out of water.

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