Is salton sea a man-made disaster?

Yes, the Salton Sea is a man-made disaster. It was created in 1905 when the Colorado River flooded into the Salton Sink, a dry lake bed in the Sonoran Desert. The flood was caused by an engineering error that resulted in the river breaking through a canal that had been built to carry water from the river to irrigate farmland. The Salton Sea has since become a highly saline, shallow lake with no outlet, and its water quality has been severely degraded by agricultural runoff and other sources of pollution.