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where is ground water

how much more water is underground compared to surface water

how does the water get there

describe the water table

Ground water is water which is located below the soil surface and contained in the pore spaces of bedrock, sand, gravel, and other such materials.

the researchers concluded that more water probably exists deep within the Earth than is present on Earth's surface—as much as five times more.

Most ground water originates from precipitation that soaks into the ground. The ground water system as a whole leads the water in the general direction of the ocean.

The water table is the surface where the water pressure head is equal to the atmospheric pressure. It may be conveniently visualized as the "surface" of the subsurface materials that are saturated with groundwater in a given vicinity.