The Imperial Reservoir is an artificial lake formed by the construction of the Imperial Diversion Dam across the Colorado River in the Lower Colorado River Valley of Imperial County, California, and Yuma County, Arizona. A component of the Imperial National Wildlife Refuge, the reservoir is 16 miles (26 km) northeast of Yuma, Arizona.
|Location||Lower Colorado River Valley|
Imperial County, California
Yuma County, Arizona
|Primary inflows||Colorado River|
|Primary outflows||Colorado River|
|Catchment area||5,756 acres (2,329 ha)|
|Basin countries||United States|
|Surface area||28 km2 (11 sq mi)|
|Water volume||160,000 acre⋅ft (200,000,000 m3)|
|Surface elevation||56 m (184 ft)|
|References||U.S. Geological Survey Geographic Names Information System: Imperial Reservoir|
Dry wash watershedsEdit
Dry washes are the major watershed feed systems to Imperial Reservoir. The next upstream major watershed feeder is the Bill Williams River from western Arizona. Upstream on the Colorado River, the basic feeder watershed to Imperial Reservoir is the Havasu-Mojave Lakes Watershed, of Lake Havasu.
Two dry wash watershed attempt to enter the Imperial Reservoir from western Arizona, south of the Bill Williams River: the Bouse and Tyson Washes. Both washes end on the eastern perimeter of the Colorado River Indian Reservation along the Colorado River. Neither enters the river proper, except in extreme flood stage.
No "lengthy" watersheds flow eastwards from California; all are short distance, in the extreme aridity of this desert region.