They compared the amount of water flowing into the lake from rivers, precipitation, and groundwater to the amount
evaporating out of the lake; if the lake stayed the same size, the water in and out should balance.
Not exact matches
The mountains are made primarily
of rock - hard water ice; the dunes are most likely ice granules coated with hydrocarbons; volcanoes probably belch methane and ammonia, and methane fills the
lakes,
evaporates to form clouds, and rains back down to carve
out river channels.
According to the U.S. National Park Service and the Bureau
of Reclamation, the amount
of water flowing
out of and
evaporating from
Lake Mead in recent years has consistently exceeded the amount
of water flowing in.