What is ground water?
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Welcome to CoreFacts, where we're always short on time and big on science. I'm Jessica Robertson. Today's question is ...
What is ground water?
Ground water is water that flows or seeps downward and saturates soil or rock, supplying springs and wells. Ground water often begins as precipitation and soaks into the ground where it is stored underground in rock crevices and in the pores of geologic materials, also known as aquifers. This process is similar to how water fills a sponge. The upper surface of the saturated zone is called the water table.
More information on ground water may be found at http://water.usgs.gov/ogw.
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