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Map showing the Upper and Lower Colorado River Basin, and adjacent areas supplied by Colorado River water. The Colorado River Basin consists of 246,000 square miles (640,000 km 2), making it the seventh largest drainage basin in North America. [1] About 238,600 square miles (618,000 km 2), or 97 percent of the basin, is in the United States. [40]
The list of drainage basins by area identifies basins (also known as "catchments" or, in North American usage, "watersheds"), sorted by area, which drain to oceans, mediterranean seas, rivers, lakes and other water bodies.
The river's first diversion is here at its headwater. The Grand Ditch redirects water from the Never Summer Mountains, which would have flowed into the Colorado River, to instead flow across the divide through La Poudre Pass to irrigate farmland to the east. Near the source of the Colorado River in Rocky Mountain National Park, Colorado
A visual journey along the Colorado River, from the headwaters to Mexico, that shows the environmental toll on the depleting resource.
Lake Powell is a water storage facility for the Upper Basin states of the Colorado River Compact (Colorado, Utah, Wyoming and New Mexico). The Compact specifies that the Upper Basin states are to provide a minimum annual flow of 7,500,000 acre-feet (9.3 km 3 ) to the Lower Basin states (Arizona, Nevada, and California).
Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, [3] [4] and impluvium. [ 5 ] [ 6 ] [ 7 ] In North America, they are commonly called a watershed , though in other English-speaking places, " watershed " is used only in its original sense, that of the drainage divide line.
A new global analysis finds U.S. states along the Colorado River are under extremely high water stress. The region is grappling with how to reduce water use.
The Colorado River Basin very well could get a few wet years, he said. “We might even get a wet decade. But, boy, the long-term warming and drying trend seems super clear to me,” Udall said.