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U.S. drought dries out underground water supplies
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Underground water supplies are often used for drinking water and farming
Staff writers
September 23, 2012 — Soil moisture appears to be drier in the U.S. following months of intense drought
NASA satellites have found that underground water supplies used for drinking water and farming are running low in parts of the U.S., following a summer of intense drought.
Scientists looked at the water content present in each layer of soil, and compared that data to the mid-September average between 1948 and 2009.
According to NASA, conditions in September 2012 are "significantly drier" than usual, but heavy rain from Isaac has caused surface and root moisture to rebound in the southern states.
Part of the data was captured by NASA's Gravity Recovery and Climate Experiment (GRACE) -- twin satellites that monitor weather, climate and seasonal conditions.
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