Aquifers are underground layers of rock that ... The U.S. Geological Survey website has a map of important aquifers in the ... then the water table can drop so low that it's below the depth of ...

The aquifer is slowly being pumped dry. Water wells, for instance, have dropped more than 61 meters (200 feet) in the Texas Panhandle. Though the trend line is downward, not all regions are equally ...

Airborne technology maps Santa Cruz County aquifers State-sponsored surveys happening Nov. 6-17. ... The signals, which can penetrate a depth of approximately 1,000 feet beneath the surface, ...

About 1.7 billion people depend on freshwater aquifers that are being depleted faster than they can be refilled by rain. That includes the crucial Ogallala Aquifer in the midwestern United States.

The map below gives an overview. There were 21 major groundwater basins — in red, orange, and yellow — that lost water faster than they could be recharged between 2003 and 2013.

The new technique will map the top of the aquifer, called the 'water table,' spanning areas as large as hundreds of kilometers using a radar mounted on a high-altitude aircraft. According to the ...