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It is very likely that there is liquid water below the Martian surface. Water almost certainly flowed on the surface millions of years ago so there are likely reserves in the sub-surface.
Underground water is cleaner.
a natural flow of water from underground
An aquifer is an underground accumulation of water.
About 3% of the water on Earth is fresh. Only about .1% of the fresh water is visible on land. About 75% of the fresh water is locked in glaciers and ice caps. Then about 24.9% of the fresh water is underground.
Natural underground reserves of fresh water are generally called aquifers.
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The same place most other places get water. Rain, underground water reserves, lakes, rivers, etc. Where else would they get water from?
4 percent
Only mineable underground reserves are extractable.
Less than 1%
100% of underground is underground.
It is very likely that there is liquid water below the Martian surface. Water almost certainly flowed on the surface millions of years ago so there are likely reserves in the sub-surface.
Only 2.75% of water in the world is fresh water. .68 % of water is underground. and .0011% of water is surface water that is in lakes, rivers, ect.
Wells are supplied by underground water reserves, which geologists call "aquifers". The aquifer itself is created by rainwater which either seeps underground or is drained away as run-off during storms, until it is contained within water-bearing rock and can sink no further. http://ga.water.usgs.gov/edu/earthgwaquifer.html
Underground water is called underground water, because it is "underground" not because it is fresh or salt. You can have underground salt water reservoirs just like you can have fresh water ones.
Underground water is called underground water, because it is "underground" not because it is fresh or salt. You can have underground salt water reservoirs just like you can have fresh water ones.