Geography

Water conservation in California’s southern desert is causing an environmental disaster as the Salton Sea quickly shrinks.

Should Colorado River water be used to grow alfalfa or subdivisions in the Phoenix metropolitan area?

A proposed hydroelectric project on the Little Colorado River shows the tricky trade-offs in transitioning from fossil fuels.

For more than 4½ years, state engineers in Colorado have expressed concerns that a conservancy district has not proven there is a need for the water, which would be stored in the proposed White River reservoir and dam project.

Pitkin County is warming, the number of frost-free days is increasing and snowpack is declining—all of which have myriad impacts on life in the Aspen area.

This year, the first-ever Colorado River Drought Contingency Plan is set to launch, and water officials expect 2020 to bring unprecedented changes to the way the river is run, including cutbacks in water use by some states.

As Aspen evolved from a bucolic high-mountain meadow to an industrial city, pollution began to flow directly into the Roaring Fork River and its tributaries.

After a year of anxious waiting, scientists and researchers who’ve helped build one of the most successful species recovery programs in the nation have gotten a 13-year extension to finish their work.

Beaver reintroduction and restoration can help with some of the West's most profound water problems, both in terms of quantity and quality. A trial program is underway at Caribou Ranch in Boulder County.

With population growth around Denver prompting fierce competition for water, investors want to import a new supply from the San Luis Valley, but many farmers and ranchers who depend...