Spring-Summer 2010 | Lake Mead, Arizona – Nevada | This Envisat image features the manmade Lake Mead, located east of Las Vegas (visible) and west of the Grand Canyon along the border of the US states of Arizona (bottom, east of river) and Nevada (the rest). Lake Mead was established in the early 1930s by the construction of the Hoover Dam on the Colorado River (bottom). The Hoover Dam (green area between the lake and river) was one of the first of some 45 000 major dams to be constructed on rivers worldwide.
This image was created by combining three Envisat radar acquisitions (15 May, 19 June and 24 July 2010) over the same area. The colours result from changes in the surface that occurred between acquisitions. From ESA's "Space in Image" collection.
Online Resources: Moreo and Swancar, 2013, Evaporation from Lake Mead, Nevada and Arizona, March 2010 through February 2012 https://pubs.usgs.gov/sir/2013/5229/ Beard and others, 2007, Preliminary geologic map of the Lake Mead 30' x 60' quadrangle, Clark County, Nevada, and Mohave County, Arizona. https://ngmdb.usgs.gov/Prodesc/proddesc_81106.htm