Summary of aquifer test data for Arkansas – 1940-2006

Groundwater-flow model of the Ozark Plateaus aquifer system, northwestern Arkansas, southeastern Kansas, southwestern Missouri, and northeastern Oklahoma

“…The hydraulic-conductivity values used for layer 4 for the Ozark aquifer (0.1 to 5 ft/d) are about a factor of 6 less than the value of about 30 ft/d obtained from Macfarlane (2007) and are within the lower part of the range of values reported by Freeze and Cherry (1979) for karstic limestone (0.1 to 2,000 ft/d). They are similar to and larger than the hydraulicconductivity values report by Pugh (2008) in Arkansas (0.44 to 1.49 ft/d). Values of specific storage used in the model for the Ozark aquifer range from about 1×10 -7 to 4×10 -5 1/day, which are similar and larger than values derived from the hydraulic tests of Macfarlane (2007) (1.6×10-7 to 1.9×10 -7 1/day).…”

Potentiometric surfaces (2013, 2015), groundwater quality (2010–15), and water-level changes (2011–13, 2013–15) in the Sparta-Memphis aquifer in Arkansas

“…The hydraulic properties of the Sparta-Memphis aquifer vary, with the highest transmissivity values exhibited by the thickest sand intervals (Kresse and others, 2014;Payne, 1968). Additional information on the hydraulic properties of the Sparta-Memphis aquifer have been discussed in previous studies (Brahana and Broshears, 1989;Hosman and others, 1968;Kresse and others, 2014;Plebuch and Hines, 1969;Pugh, 2008).…”

Characterization of the structure, clean-sand percentage, dissolved-solids concentrations, and estimated quantity of groundwater in the Upper Cretaceous Nacatoch Sand and Tokio Formation, Arkansas

“…A few wells completed in the Tokio Formation can produce from 150 to 300 gal/min. An aquifer test in southern Howard County resulted in a transmissivity of about 170 ft²/d and a storage coefficient of 4.4 × 10 -5 (Pugh, 2008). Results of a test using a municipal well in Hempstead County resulted in a transmissivity of about 600 ft²/d (Boswell and others, 1965).…”