May 17, 2011
GROUNDWATER Where does it come from? Groundwater is an important part of the water cycle. It comes from rain, snow, sleet and hail that soak into […]
May 1, 2011
The subsurface water system can be divided into an unsaturated (vadose) zone that normally has air-filled spaces, and a saturated zone in which all available spaces […]
June 27, 2010
About half the population in the United States relies to some extent on groundwater as a source of drinking water, and still more use it to […]