Geography
At Badwater, significant rainstorms flood the valley bottom periodically, covering the salt pan with a thin sheet of standing water. Each newly-formed lake does not last long though, because the 1.9 in (48 mm) of average rainfall is overwhelmed by a 150 in (3,800 mm) annual evaporation rate. This, the United States' greatest evaporation potential, means that even a 12-foot-deep, 30-mile-long lake would dry up in a single year. While the basin is flooded, some of the salt is dissolved; it is redeposited as clean crystals when the water evaporates.
A popular site for tourists is the sign marking "sea level" on the cliff above Badwater.
Read more about this topic: Badwater Basin
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