Water Levels and Selected Water-Quality Conditions in the Sparta-Memphis Aquifer (Middle Claiborne Aquifer) in Arkansas, Spring-Summer 2007

Abstract

Conversion Factors and Datums Multiply By To obtain Length foot (ft) 0.3048 meter (m) mile (mi) 1.609 kilometer (km) Flow rate million gallons per day (Mgal/d) 0.04381 cubic meters per second (m 3 /s) foot per year (ft/yr) 0.3048 meter per year (m/yr) Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:°F =(1.8×°C)+32 Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:°C =(°F-32)/1.8 Vertical coordinate information is referenced to the National Geodetic Vertical Datum of 1929 (NGVD 1929). Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 1983). Altitude as used in this report, refers to distance above the vertical datum. Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25°C). Concentrations of chemical constituents in water are given in milligrams per liter (mg/L) or micrograms per liter (µg/L).

Water levels and water quality in the Sparta-Memphis aquifer (middle Claiborne aquifer) in Arkansas, spring-summer 2009

“…The depression centered in Jefferson County has deepened and expanded in recent years into Arkansas and Prairie Counties as a result of large withdrawals for irrigation and public supply. The lowest water-level altitude measured in this depression is approximately 3 ft higher in 2009 than in 2007 (Schrader, 2009). The area enclosed within the 40-ft contour on the 2009 potentiometric-surface map has expanded south to the Drew County line and moved west from the intersection of Arkansas, Jefferson, and Lincoln Counties when compared with the 2007 potentiometric-surface map (Schrader, 2009).…”

“…The lowest water-level altitude measured in this depression is approximately 3 ft higher in 2009 than in 2007 (Schrader, 2009). The area enclosed within the 40-ft contour on the 2009 potentiometric-surface map has expanded south to the Drew County line and moved west from the intersection of Arkansas, Jefferson, and Lincoln Counties when compared with the 2007 potentiometric-surface map (Schrader, 2009). To the north, east, and west, the location of the 40-ft contour is comparable to the 2007 potentiometric-surface map (Schrader, 2009).…”

“…To the north, east, and west, the location of the 40-ft contour is comparable to the 2007 potentiometric-surface map (Schrader, 2009). The area of 40-ft contour is about the same on the 2009 and 2007 potentiometric-surface maps (Schrader, 2009).…”

“…The area enclosed within the 40-ft contour on the 2009 potentiometric-surface map has expanded south to the Drew County line and moved west from the intersection of Arkansas, Jefferson, and Lincoln Counties when compared with the 2007 potentiometric-surface map (Schrader, 2009). To the north, east, and west, the location of the 40-ft contour is comparable to the 2007 potentiometric-surface map (Schrader, 2009). The area of 40-ft contour is about the same on the 2009 and 2007 potentiometric-surface maps (Schrader, 2009).…”

Water levels and water quality in the Sparta-Memphis aquifer (middle Claiborne aquifer) in Arkansas, spring-summer 2011

“…In 2011, the area decreased, with water levels rising about 1 ft since 2005 in the well with the lowest water-level altitude measurement. The depression in Bradley County was first shown in 2007 (Schrader, 2009). In 2011, this depression decreased in area.…”