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Water table - Wikipedia ... Water table
Aquifer - Wikipedia ... Aquifer
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Vadose zone - Wikipedia ... Vadose zone
Geology of the Grand Canyon area
In 1978, the US Geological Survey found a 350-foot decline in the level of the water table. [6] The USGS published research in 1997, examining the Pennsylvanian and Permian age sandstone, limestone and siltstone underlying Flagstaff and the southern Colorado Plateau, which forms a complex regional aquifer with poorly understood groundwater flow ...
Nubian Sandstone Aquifer System
Landsat 5 image. A sabkha (Arabic: سبخة) is a coastal, supratidal mudflat or sandflat in which evaporite -saline minerals accumulate as the result of semiarid to arid climate. Sabkhas are gradational between land and intertidal zone within restricted coastal plains just above normal high-tide level.