Status of water levels in aquifers in the Nacatoch Sand of southwestern and northeastern Arkansas and the Tokio Formation of southwestern Arkansas, February 2005

Water levels in aquifers in the Nacatoch Sand of southwestern and northeastern Arkansas and the Tokio Formation of southwestern Arkansas, spring 2008

“…6 and 7), increased from about 179 ft in 1985 to about 267 ft in 1990, an average rise of about 17.6 ft/yr in the 5-year period (Schrader, 2007). This increase in water levels occurred when the withdrawal rates from the Nacatoch aquifer in Nevada County decreased from 1.11 Mgal/d in 1985 to 0.44 Mgal/d in 1990 (Holland, 1987(Holland, , 1993, a decrease of about 60 percent ( fig.…”

“…These declines may be associated with increased withdrawals in Clay County during this period from 0. (Halberg and Stephens, 1966;Holland, 1993Holland, , 2007Schrader, 2007 (Halberg, 1977;Holland and Ludwig, 1981), an increase of 72 percent ( fig. 4) (Holland, 1987(Holland, , 1999(Holland, , 2004(Holland, , 2007).…”

“…Historical water levels indicate a decline of 40 ft from an altitude of 185 ft in 1942 to 145 ft in 1969 (Ludwig, 1972). The water-level altitude in January 2002 was 119 ft (Schrader and Scheiderer, 2004). This depression alters local groundwater-flow directions from the regional direction, with groundwater flowing towards Hope from the west, north, and northeast directions.…”

“…This depression alters local groundwater-flow directions from the regional direction, with groundwater flowing towards Hope from the west, north, and northeast directions. A comparison with the 2002 potentiometric-surface maps (Schrader and Scheiderer, 2004) …”

Water-level trends and potentiometric surfaces in the Nacatoch Aquifer in northeastern and southwestern Arkansas and in the Tokio Aquifer in southwestern Arkansas, 2014–15

“…7). Water levels in wells near the Hope area have been less than 185 ft above NGVD 29 since at least 1942 (Ludwig, 1972;Schrader and Scheiderer, 2004). The apparent cone of depression alters groundwater flow from the regional direction with groundwater flowing from the north, northeast, and west toward Hope.…”