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As climate change and overuse shrink Lake Powell, the emergent landscape is coming back to life – and posing new challenges

Daniel Craig McCool, Professor Emeritus of Political Science, University of Utah, The Conversation on

Published in News & Features

These water supply issues have created a serious crisis in the basin, but there is also an opportunity to recover an amazing landscape. Over 100,000 acres of formerly flooded land have emerged, including world-class scenery that rivals some of the crown jewels of the U.S. national park system.

Glen Canyon made a deep impression on explorer John Wesley Powell when he surveyed the Colorado River starting in 1867. When Powell’s expedition floated through Glen Canyon in 1869, he wrote:

“On the walls, and back many miles into the country, numbers of monument-shaped buttes are observed. So we have a curious ensemble of wonderful features – carved walls, royal arches, glens, alcove gulches, mounds, and monuments … past these towering monuments, past these oak-set glens, past these fern-decked alcoves, past these mural curves, we glide hour after hour.”

Glen Canyon remained relatively unknown until the late 1940s, when the Bureau of Reclamation proposed several large dams on the upper Colorado River for irrigation and hydropower. Environmentalists fiercely objected to one at Echo Park in Dinosaur National Monument on the Colorado-Utah border, alarmed by the prospect of building a dam in a national monument. Their campaign to block it succeeded – but in return they accepted a dam in Glen Canyon, a decision that former Sierra Club President David Brower later called his greatest regret.

The first goal of managing the emergent landscape in Glen Canyon should be the inclusion of tribes in a co-management role. The Colorado River and its tributaries are managed through a complex maze of laws, court cases and regulations known as the “Law of the River.” In an act of stupendous injustice, the Law of the River ignored the water rights of Native Americans until courts stepped in and required western water users to consider their rights.

Tribes received no water allocation in the 1922 Colorado River Compact and were ignored or trivialized in subsequent legislation. Even though modern concepts of water management emphasize including all major stakeholders, tribes were excluded from the policymaking process.

There are 30 tribes in the Colorado River Basin, at least 19 of which have an association with Glen Canyon. They have rights to a substantial portion of the river’s flow, and there are thousands of Indigenous cultural sites in the canyon.

Another management challenge is the massive amounts of sediment that have accumulated in the canyon. “Colorado” means “colored red” in Spanish, a recognition of the silt-laden water. This silt used to build beaches in the Grand Canyon, just downstream, and created the Colorado River delta in Mexico.

But for the past 63 years, it has been accumulating in Lake Powell, where it now clogs some sections of the main channel and will eventually accumulate below the dam. Some of it is laced with toxic materials from mining decades ago. As more of the canyon is exposed, it may become necessary to create an active sediment management plan, including possible mechanical removal of some materials to protect public health.

 

The creation of Lake Powell also resulted in biological invasives, including nonnative fish and quagga mussels. Some of these problems will abate as the reservoir declines and a free-flowing river replaces stagnant still water.

On a more positive note, native plants are recolonizing side canyons as they become exposed, creating verdant canyon bottoms. Restoring natural ecosystems in the canyon will require innovative biological management strategies as the habitat changes back to a more natural landscape.

Finally, as the emergent landscape expands and side canyons recover their natural scenery, Glen Canyon will become a unique tourist magnet. As the main channel reverts to a flowing river, users will no longer need an expensive boat; anyone with a kayak, canoe or raft will be able to enjoy the beauty of the canyons.

Glen Canyon National Recreation Area, which includes over 1.25 million acres around Lake Powell, was created to cater to people in motorized boats on a flat-water surface. Its staff will need to develop new capabilities and an active visitor management plan to protect the canyon and prevent the kind of crowding that is overrunning other popular national parks.

Other landscapes are likely to emerge across the West as climate change reshapes the region and numerous reservoirs decline. With proper planning, Glen Canyon can provide a lesson in how to manage them.

This article is republished from The Conversation, an independent nonprofit news site dedicated to sharing ideas from academic experts. If you found it interesting, you could subscribe to our weekly newsletter.

Read more:
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I know many of the people involved in the controversy regarding the future of Lake Powell and Glen Canyon.


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