Water-level maps of the Mississippi River Valley alluvial aquifer in eastern Arkansas, spring 1992

Altitude of the potentiometric surface in the Mississippi River Valley alluvial aquifer, spring 2020

“…Previously published potentiometric-surface maps for a large part of the MRVA include maps from water levels measured from 1953 to 1961 (Krinitzsky and Wire, 1964), for 1964 (Boswell and others, 1968), and for 2016 and 2018 others, 2019, 2020). Previously published potentiometric-surface maps for parts of the MRVA include maps for the Grand Prairie region in Arkansas in 1929, 1939, and 1959(Engler and others, 1963 and selected counties in northeast and central Arkansas in 1965and 1966(Albin and others, 1967Plebuch and Hines, 1967); the entire aquifer area in Arkansas for 1972, 1980, 1984, 1985, 1986, 1987, 1992, 1994, 1998, 2002, and 2012(Ackerman, 1989Edds and Fitzpatrick, 1984;Joseph, 1999;Plafcan and Edds, 1986;Plafcan and Fugitt, 1987;Plafcan and Remsing, 1989;Reed, 2004;Schrader, 2001Schrader, , 2010Schrader, , 2015Stanton and others, 1998;Westerfield, 1990;Westerfield and Gonthier, 1993;Westerfield and Poynter, 1994); the aquifer area in northwestern Mississippi for various years including 1976including , 1980including , 1981including , 1982including , and 1983including (Dalsin, 1978…”

Altitude of the potentiometric surface in the Mississippi River Valley alluvial aquifer, spring 2018

“…Previously published potentiometric-surface maps for a large part of the MRVA aquifer include maps from water levels measured from 1953 to 1961 (Krinitzsky and Wire, 1964), for 1964 (Boswell and others, 1968), and for 2016(McGuire and others, 2019. Previously published potentiometric-surface maps for parts of the MRVA aquifer include maps for the Grand Prairie region in Arkansas in 1929, 1939, and 1959(Engler and others, 1963 and selected counties in northeast and central Arkansas in 1965and 1966(Albin and others, 1967Plebuch and Hines, 1967); the entire aquifer area in Arkansas for 1972, 1980, 1984, 1985, 1986, 1987, 1989, 1992, 1996, 1998, 2000, 2002, and 2012(Ackerman, 1989Edds and Fitzpatrick, 1984;Plafcan and Edds, 1986;Plafcan and Fugitt, 1987;Plafcan and Remsing, 1989;Westerfield, 1990;Westerfield and Gonthier, 1993;Westerfield and Poynter, 1994;Stanton and others, 1998;Joseph, 1999;Reed, 2004;Schrader, 2001Schrader, , 2010Schrader, , 2015; the aquifer area in northwestern Mississippi for various years including 1976including , 1980including ...…”

Potentiometric surface of the Mississippi River Valley alluvial aquifer, spring 2016

“…Previously published potentiometric surface maps for a large part of the MRVA aquifer include ones from water levels measured from 1953 to 1961 (Krinitzsky and Wire, 1964) and for 1964 (Boswell and others, 1968). Previously published potentiometric surface maps for parts of the MRVA aquifer include ones for the Grand Prairie region in Arkansas in 1929, 1939, and 1959(Engler and others, 1963 and selected counties in northeast and central Arkansas in 1965and 1966(Albin and others, 1967Plebuch and Hines, 1967); the entire aquifer area in Arkansas for 1972, 1980, 1984, 1985, 1987, 1989, 1992, 1996, 1998, 2000, 2002, and 2012(Ackerman, 1989Edds and Fitzpatrick, 1984;Plafcan and Edds, 1986;Plafcan and Fugitt, 1987;Plafcan and Remsing, 1989;Westerfield, 1990;Westerfield and Gonthier, 1993;Westerfield and Poynter, 1994;Stanton and others, 1998;Joseph, 1999;Reed, 2004;Schrader, 2001Schrader, , 2010Schrader, , 2015; the aquifer area in northwestern Mississippi for various years including 1976including , 1980including , 1981including , 1982including , and 1983including (Dalsin, 1978…”