89°30’90°90°30’91°91°30’

35°30’

35°

34°30’

34°

33°30’

33°

32°30’

32°

Hollandale

Charleston

Vicksburg

Moorhead

Durant

Memphis

Senatobia

Greenville

McGehee

Leland

Dermott

Dumas

Helena-West Helena

Brinkley

Arlington

YazooCity

LakeProvidence

Batesville

Searcy

DeWitt

Stuttgart

Monticello

Atoka

Ruleville

Marks

Bald Knob

Marianna

ForrestCity

Tallulah

DelhiRayville

Hamburg

Grenada

Belzoni

Covington

Tunica

WaterValley

Itta Bena

Clarksdale

Winnsboro

LakeVillage

Wynne

Indianola

Cleveland

Greenwood

Newport

Jackson

YAZOO

DESHA

BOLIVAR

SHELBY

HOLMES

CHICOT

PANOLA

TATE

PHILLIPS

POINSETT

WARREN

LEFLORE

MADISON

CARROLL

TUNICA

DESOTO

WASHINGTON

COAHOMA

CRITTENDEN

SHARKEY

GRENADA

TALLAHATCHIE

QUITMAN

HUMPHREYS

SUNFLOWER

ISSAQUENA

EASTCARROLL

TIPTON

LEE

LOUISIANA

MISSISSIPPI

TENNESSEE

ARKANSAS

Mississippi River

Mississippi River

Saint Francis River

L’Anguille River

Pano

la Q

uitm

an F

lood

way

Talla

hatc

hie R

iver

Yalob

usha

River

Big Black River

Qui

ver R

iver

Big

Sunf

lowe

r Riv

er

Big

Sunf

lowe

r Riv

er

Little Sunflower River

Yazoo

Rive

r

Yazoo River

Loosa

hatchie River

Wolf River

Coldwater R

iver

Little Tallahatch

ie River

Yocona River

White River

Cold

wate

r Ri

ver

Hus

hpuc

kena

R

40

55

40

55

55

55

2020

9090

130130100100

120120

8080

110110

200

200

170170

170170

120

120

120

120

180180

110

110

100

100

140140

9090

190190

170170

160160

170

170

9090

7070

170170

9090

6060

8080

140140

808014

014

0

7070

8080

180180

190190

110110 120

120 130

130

190190

180

180

160160150

150

140140

6060

100

100

90909090

8080

9090

110110

100

100

150150

140140

9090

8080

6060

5050

8080

9090

150

150

160

160

150150

120120

130130140140

150150

8080

210210

1001009090

83.00

80.00

193.00

190.00

149.00

164.00

144.00

133.00

130.00

111.00

88.6096.50

93.60

92.20

85.9098.50 86.9092.90

91.6097.9090.10 84.20

70.3083.60

91.70

87.6081.4089.10

95.80

77.80

94.80

97.30

180.10

185.60

197.80

189.9

159.80

150.60135.40

167.30

151.90

151.90

152.10152.60

157.8

149.80

160.50

158.80

113.30 149.50109.60

135.40

106.70

99.7899.06

98.31 139.90

94.12

96.75

99.74

89.8199.23 115.2095.4897.09

112.3099.32

99.84 86.5397.9186.14

129.3092.58

82.7391.86 81.11

79.8475.2191.72 90.2297.46 97.5991.0393.39

76.87114.60 82.98

72.2586.3786.9471.63

97.52124.2068.87

75.1975.84

112.1067.21

86.5183.7799.69

85.27 79.1368.71

73.33

92.9685.97

67.3186.66

73.71

77.8384.8571.38

81.7983.14

74.12

62.9283.95

64.8686.49

89.26

59.54

77.39

84.2988.29

80.47

85.07

62.91

84.54 61.7687.99

69.0564.8191.95

74.5884.91

59.37

84.8988.57 64.8284.04

89.08 79.89

65.68 71.6367.26 74.98

76.05

97.32

88.72 83.9195.51

72.36 83.2786.39 75.29

89.43

81.5786.44

92.12

80.08 98.7692.9575.52

95.61

77.2375.77 95.46

89.21

91.21

84.99

91.1577.68 92.1780.05

97.96

82.6787.02

87.49 87.9285.83

97.2380.28

81.77 87.5982.52 84.1378.2479.5978.67

81.7484.78

77.26

76.3777.35

75.31

74.92

77.75

76.9885.76 91.66

84.1878.52

82.3479.64

75.4478.87

82.11

91.81

79.9981.58

97.66

75.5982.06

81.9196.92

82.1280.8392.01 88.8980.1980.43

99.9881.68

85.0887.26

85.71 79.2183.55

84.6891.31

81.7493.14

94.0585.93

97.69

90.63

87.3387.73 83.21

86.3788.43 94.93

91.5590.63

90.81

64.4491.08

63.97

91.6689.77

72.66

70.07

199.14

192.27

185.12 188.35195.14

188.99184.03

203.07

183.25

168.06169.67

184.05

189.08

190.19177.05

193.04

186.98

199.39198.69

194.84 196.85

195.77193.07

193.74132.86 180.85

135.27

188.45154.65 187.74189.64

152.72

164.23 189.19174.75186.69140.71

180.32180.53177.56173.58

178.86183.88

180.94193.33

161.74

185.94175.15

173.93

155.59

158.84156.91

160.49167.25

156.48 153.07162.02 158.61

154.59156.65170.75

150.29154.88156.44143.88

166.77 159.21

153.88

172.89149.82 161.12

148.53 172.67146.01

161.37

166.83166.85

145.69

161.87

139.86 147.84162.32

147.77141.85

142.27

159.83

142.86155.65

159.04

149.49145.06

140.81

139.37134.58147.12

136.53129.24137.45

148.54156.37

152.07 116.82128.45

125.75

126.27

150.23121.14116.33

115.31133.49133.06

118.76 119.62129.82

110.15104.48 104.77

101.09

108.17149.19

102.54 147.64115.69

101.37

108.77144.22 110.73

131.18 103.59

159.45110.57

117.01 135.07113.71

110.14

119.52

101.52131.81127.76116.34 126.36131.12

128.49 120.72 101.69114.61 128.54 127.48

126.31129.19

130.25121.29111.18123.12

109.08130.97

113.87

118.08

117.79 116.44

102.73 124.12145.56124.03

135.11132.82

107.64 111.16

119.52

111.43135.64114.34

101.42

132.06

134.51

120.24

131.56

131.89

117.86

118.65102.88

100.36129.48 126.88

134.75

132.18

117.67130.66

123.56106.48

130.33

127.73124.79

105.91

110.42118.81110.21

113.42 120.23

109.01101.27

118.52 101.75

117.35117.65123.63

111.79100.58119.68

101.51 113.81100.96

111.55

100.88116.14

110.78

103.28

109.25

104.46109.36

102.93

103.27

67.00

110.00

77.70

86.70

95.40

90.30

168.20

103.60

98.73

94.98

96.12

84.12

66.5673.3481.2183.02

62.22

66.74

82.07

79.75

57.96

59.4864.8773.51

63.7694.01

91.29

69.26

73.7683.54

93.3798.25

87.83

90.9592.26

95.4487.89

88.1377.29

97.3493.13

87.6374.94

93.73

96.03

93.35

89.27

81.58

178.03

178.19171.66

174.43167.56

164.94

157.43

146.66145.85

164.38147.04

142.57 157.01

146.14153.56

144.67

143.04130.77

121.35

128.29102.62103.01

105.22

134.42103.72

113.99125.48

104.53

115.27

119.27

98.00

97.18

84.47

91.16

85.4884.71

62.45

66.64

82.33

200.02

161.73

128.17

94.41

65.75

84.40

190.37

125.61

107.09

Base from U.S. Geological Survey digital data, 1:1,000,000 and 1:2,000,000, variously dated Highways from National Highway Planning Network, various scales, 2014Urban areas from U.S. Census Bureau, 1:500,000, 2016Albers_NHG projectionStandard parallels 45°30’N and 29°30’N, central meridian 96°00’NWorld Geodetic Survey of 1984

U.S. Department of the InteriorU.S. Geological Survey

Scientific Investigations Map 3439Sheet 4 of 5

Pamphlet accompanies map

For more information about this publication, contact:Director, USGS Nebraska Water Science Center 5231 South 19th StreetLincoln, NE 68512402–328–4100

For additional information, visit: https://www.usgs.gov/centers/ne-water

Publishing support provided by the Rolla Publishing Service CenterISSN 2329-132X (online)

https://doi.org/10.3133/sim3439

ByV.L. McGuire, R.C. Seanor, W.H. Asquith, W.H. Kress, and K.R. Strauch

2019

Current extent of MRVA aquifer from Painter and Westerman, 2018MAP regions from Ladd and Travers, 2019

Potentiometric Surface, Mississippi River Valley Alluvial (MRVA) Aquifer, Spring 2016, and Associated Groundwater and Surface Water Control Points for the Delta Region in the Mississippi Alluvial Plain (MAP)

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

EXPLANATION

140140 Potentiometric contour—Shows altitude at which water level would have stood in tightly cased wells (spring 2016). Dashed where approximately located. Hachures indicate depression. Contour interval 10 feet. Datum is North American Vertical Datum of 1988

Area of MRVA aquifer with insufficient groundwater altitude data

MAP regions

Urban area

Cache

Grand Prairie

St. Francis

Well in a groundwater-monitoring network with a groundwater altitude that was used in the spring 2016 potentiometric surface map, MRVA aquifer

Streamgage with a surface-water altitude that was used in the spring 2016 potentiometric surface map, MRVA aquifer

Delta

Boeuf

State boundary

County or parish boundary

135.64

128.17

Regional groundwater-flow direction