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Groundwater is water that exists in the pore spaces and fractures in rock and sediment beneath the Earth's surface. It originates as rainfall or snow, and then moves through the soil into the groundwater system, where it eventually makes its way back to surface streams, lakes, or oceans.
Groundwater makes up about 1% of the water on Earth (most water is in oceans).
But, groundwater makes up about 35 times the amount of water in lakes and streams.
Groundwater occurs everywhere beneath the Earth's surface, but is usually restricted to depths less that about 750 meters.
The volume of groundwater is a equivalent to a 55 meter thick layer spread out over the entire surface of the Earth.
It is an important resource for potable water, irrigation, and industry.
Groundwater is water that exists in the pore spaces and fractures in rock and sediment beneath the Earth's surface. It originates as rainfall or snow, and then moves through the soil into the groundwater system, where it eventually makes its way back to surface streams, lakes, or oceans.
Groundwater makes up about 1% of the water on Earth (most water is in oceans).
But, groundwater makes up about 35 times the amount of water in lakes and streams.
Groundwater occurs everywhere beneath the Earth's surface, but is usually restricted to depths less that about 750 meters.
The volume of groundwater is a equivalent to a 55 meter thick layer spread out over the entire surface of the Earth.
It is an important resource for potable water, irrigation, and industry.
Because it is largely hidden from view, it is often forgotten and subject to contamination by careless humans.
Groundwater is a primary agent of chemical weathering and is responsible for the formation of caves and sinkholes.
