Canals Draining Lake Nasser into the Toshka Lakes, Egypt
Several canals are seen connecting Lake Nasser (bright white, bottom) to one of the Toshka lakes (black or dark grey, top).
Toshka Lakes is the name given to recently formed endorheic lakes in the Sahara Desert of Egypt. These lakes are a sort of side-effect of the Aswan High Dam:
The Aswan High Dam, constructed in Egypt in 1964-1968, created Lake Nasser, with a maximum water level of 183 m above sea level.
In 1978 Egypt began building the Sadat Canal NW from Lake Nasser through Wadi Toshka to allow water levels higher than 178 m to be drained off into a depression at the south end of the Eocene limestone plateau. In the late 1990s, water began flowing through the Sadat Canal into the Western Desert.
The first, easternmost lake began growing in November 1998. By late 1999, three additional lakes formed successively westward, and the westernmost lake started forming sometime between September 2000 and March 2001.
These lakes are not yet named individually. In total, the Toshka Lakes cover approximately 1300 square kilometers (502 mi²).