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The only two places for water in this arid region to go are into the air or into the ground. The underlying limestone prevents much ground infiltration. In the Toshka region, annual precipitation averages a meager 1.5 millimeters, and the potential evaporation rate is 14–15 millimeters per day. With no natural outlet and reduced water input to these lakes from Lake Nasser, the water evaporated quickly. Starting in 2019, flooding rains in Sudan once again brought excess water to Lake Nasser, and water once again flowed into the Toshka basin.

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Dec. 8 and 15, 1989, Landsat 4 (path/row 175,176/44) — Toshka Lakes, Egypt
Aug. 19 and 26, 2001, Landsat 7 (path/row 175,176/44) — Toshka Lakes, Egypt
Aug. 19 and 28, 2013, Landsat 8 (path/row 175,176/44) — Toshka Lakes, Egypt
Aug. 23 and 30, 2017, Landsat 8 (path/row 175,176/44) — Toshka Lakes, Egypt
July 3 and 12, 2019, Landsat 8 (path/row 175,176/44) — Toshka Lakes, Egypt
Mar. 24 and 18, 2021, Landsat 8 (path/row 175,176/44) — Toshka Lakes, Egypt
Nov. 22 and 29, 2021, Landsat 8 (path/row 175,176/44) — Toshka Lakes, Egypt
Feb. 9, 10, 2022, Landsat 9, 8 (path/row 176,175/44) — Toshka Lakes, Egypt

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