Concept

Imperial Valley

The Imperial Valley (Valle de Imperial or Valle Imperial) of Southern California lies in Imperial and Riverside counties, with an urban area centered on the city of El Centro. The Valley is bordered by the Colorado River to the east and, in part, the Salton Sea to the west. Farther west lies the San Diego and Imperial County border. To the north is the Coachella Valley region of Riverside County, which together with Imperial Valley form the Salton Trough, or the Cahuilla Basin, also the county line of Imperial and Riverside counties, and to the south the international boundary with Mexico. The culture of the area blends those of the United States and Mexico, due to its regional history and geographic location along the international border. The Imperial Valley economy is based on agriculture. Imperial Valley was named by the Imperial Land Company, in the hopes of attracting settlers. It is now the home of the El Centro metropolitan area. Locally, the terms "Imperial Valley" and "Imperial County" are used synonymously. Imperial Valley is also called Lithium Valley, because of its rich supply of lithium, used to power electric vehicles, cameras, etc. The Imperial Valley extends southward for from the southern end of the Salton Sea into Mexico. Part of a trough stretching from the Coachella Valley to the Gulf of California, it is almost entirely below sea level— below at the edge of the Salton Sea. Its hot desert climate is characterized by daily temperature extremes. It was once part of the Gulf of California, from which it was cut off by the dam-like deposits of the Colorado River Delta Fan as it carved out the Grand Canyon. Bordered by sand dunes and barren mountains, it was uninhabited until 1901, when the Imperial Canal was opened and diverted Colorado River water into the valley through Mexico. Floodwaters in 1905–07 destroyed the irrigation channels and created the Salton Sea now filled by the New River and irrigation run-off. The rivers in the southern part of the Salton Sea river basin flow south to north.

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