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Knierim, Katherine J.

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Dataset contains the groundwater well locations and water-level measurements for 273 wells measured during a water-level survey of the Sparta-Memphis aquifer in Arkansas, January through June 2015. Well-location and water-level data is publicly available from the U.S. Geological Survey's National Water Information System.
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The groundwater-level change maps for the Sparta-Memphis aquifer are constructed as a point-to-point comparison between wells measured in both 2011 and 2013. Wells not measured in both 2011 and 2013 were not included in the change maps construction. The 2011-2013 change map contains 261 corresponding wells. Groundwater-level differences were calculated by subtracting 2011 groundwater-level measurements, in ft below land surface from the 2013 groundwater-level measurements, in feet below land surface.
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Dataset contains 20-ft contours for the 2015 Sparta-Memphis aquifer potentiometric-surface map, in Arkansas. The potentiometric-surface shows altitudes at which the water levels would have risen in tightly-cased wells and represents conditions during the period from January through June 2015. Groundwater-level data from wells cased completely in and with the screened interval open to the Sparta-Memphis aquifer are publicly available from the U.S. Geological Survey’s National Water Information System.
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The groundwater-level change maps for the Sparta-Memphis aquifer are constructed as a point-to-point comparison between wells measured in both 2013 and 2015. Wells not measured in both 2013 and 2015 were not included in the change maps construction. The 2013-2015 change map contains 241 corresponding wells. Groundwater-level differences were calculated by subtracting 2013 groundwater-level measurements, in feet below land surface from the 2015 groundwater-level measurements, in feet below land surface.
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