Low and High Estimates of the Area of Nontidal wetlands Close to Sea Level in Virginia (square kilometers)

 

Jurisdiction

 

                                       Meters above Spring High Water

Tidal

low

high

low

high

low

high

low

high

low

high

low

high

low

high

 

wetlands

0.5

1.0

1.5

2.0

3.0

4.0

5.0

 

 

-------Cumulative (total) amount of nontidal wetlands below a given elevation (km2)-------------

Eastern Shore

946

7

22

20

48

39

76

63

101

107

126

131

146

149

161

Accomack

484

7

21

19

45

36

70

58

92

98

114

119

132

134

145

Northampton

462

0.4

1.2

1

3.4

2.5

5.9

4.7

8.1

8.8

11

12

14

15

16

Northern Virginia

17

0

1

0

2

1

3

2

3

3

4

4

5

5

6

Stafford

6.8

0

0.5

0.3

1

0.6

1.5

1

1.9

1.7

2.6

2.3

3.3

3

3.9

Alexandria

0.2

0

0.03

0.02

0.07

0.04

0.1

0.06

0.11

0.11

0.11

0.11

0.11

0.11

0.12

Fairfax

4.9

0

0.2

0.1

0.4

0.2

0.6

0.4

0.7

0.6

0.9

0.9

1.2

1.1

1.4

Prince William

5.1

0

0.2

0.1

0.3

0.2

0.5

0.3

0.6

0.5

0.7

0.7

0.8

0.8

0.9

Rappahannock Area

20

0

0.6

0.3

1.2

0.7

1.7

1.1

2.4

1.9

3.6

3.1

4.9

4.3

6.2

Fredericksburg

0

0

<0.01

<0.01

0.01

<0.01

0.01

<0.01

0.01

0.01

0.01

0.01

0.01

0.01

0.01

King George

13

0

0.5

0.3

1

0.6

1.5

1

2

1.7

2.8

2.5

3.7

3.3

4.6

Spotsylvania

0.1

0

0.02

0.01

0.03

0.02

0.05

0.03

0.06

0.05

0.07

0.06

0.08

0.08

0.12

Caroline

6.3

0

0.1

0.03

0.1

0.1

0.2

0.1

0.3

0.2

0.7

0.5

1.1

0.9

1.5

Northern Neck

57

0

2.5

1.2

4.8

2.9

7.3

4.7

9.8

8.1

18

14

26

22

34

Westmoreland

14

0

0.5

0.3

1

0.6

1.5

1

2.2

1.7

5.6

4.1

8.9

7.3

12

             Richmond

22

0

0.9

0.4

1.7

1

2.5

1.6

3.3

2.8

4.5

4

5.7

5.1

6.9

           Northumberland

11

0

0.5

0.3

1.1

0.6

1.6

1

2.2

1.8

5.1

3.8

8

6.6

11

Lancaster

9.8

<0.01

0.5

0.3

1.1

0.7

1.6

1.1

2.1

1.8

2.8

2.5

3.5

3.2

4.2

Middle Peninsula

165

2.6

12

9.5

26

19

40

31

54

55

78

79

98

98

113

Essex

28

0

0.8

0.4

1.5

0.9

2.3

1.5

2.9

2.5

3.9

3.5

4.8

4.4

5.9

King and Queen

22

0

0.9

0.5

1.7

1.1

2.5

1.6

3.1

2.8

4

3.6

4.8

4.4

5.8

King William

36

0

0.4

0.2

0.7

0.5

1.1

0.7

1.4

1.2

2

1.8

2.6

2.3

3.3

Middlesex

9.7

<0.01

0.7

0.4

1.4

0.8

2.1

1.4

2.8

2.4

3.5

3.2

4.1

3.8

4.8

Gloucester

44

1.4

5.5

4.5

12

9.1

19

15

25

25

31

30

36

34

38

Mathews

27

1.2

3.8

3.5

8.6

6.7

14

11

19

22

34

37

46

48

55

Hampton Roads

329

12

42

38

74

64

96

84

127

127

205

202

285

279

391

James City

33

<0.01

0.8

0.4

1.5

0.9

2.2

1.4

2.8

2.5

3.7

3.3

4.6

4.2

5.6

York

17

0.19

0.9

0.7

2.7

1.9

4.9

3.7

6.7

6.9

8

8.2

9.1

9.2

9.9

Newport News

15

0.1

0.3

0.3

0.7

0.5

1

0.9

1.3

1.35

1.42

1.4

1.5

1.6

1.7

Poquoson

24

0.02

0.1

0.1

0.4

0.3

0.8

0.6

1.1

1.1

1.1

1.1

1.1

1.1

1.1

Hampton

14

0.06

0.2

0.2

0.4

0.3

0.6

0.5

0.9

1.1

2.2

2.5

4

4.4

6.2

Surry

11

0

0.6

0.3

1.3

0.8

1.9

1.2

2.4

2.1

2.7

2.6

3

2.9

3.4

Isle of Wight

29

<0.01

0.3

0.2

0.6

0.4

0.9

0.6

1.4

1

3.1

2.4

4.8

4

7.3

Norfolk

4.7

0.1

0.3

0.2

0.5

0.4

0.8

0.7

1.1

1.1

1.5

1.5

1.7

1.7

1.7

Virginia Beach

112

4.2

14

13

25

22

33

29

41

43

50

51

56

56

59

Suffolk

26

0.03

0.2

0.1

0.3

0.2

0.4

0.3

0.8

0.5

1.8

1.4

3.1

2.9

33

Portsmouth

3.7

2.4

7.7

6.8

8.9

8.9

9.2

9.1

9.5

9.6

10

10

11

10.9

11

Chesapeake

40

4.5

17

15

32

28

40

36

58

56

120

116

186

180

251

Other Jurisdictions

85

0

5.5

3.2

11

6.9

16

10

20

18

24

22

28

26

33

Charles City

22

0

1.9

1.1

3.7

2.4

5.6

3.6

6.8

6.2

8

7.5

9.2

8.6

11

Chesterfield

11

0

0.4

0.2

0.7

0.4

1.1

0.7

1.2

1.1

1.2

1.2

1.3

1.2

1.3

Henrico

4.2

0

0.04

0.02

0.08

0.05

0.12

0.1

0.2

0.1

0.2

0.2

0.3

0.3

0.4

Hopewell

0.7

0

0.1

0.1

0.2

0.1

0.3

0.2

0.3

0.3

0.4

0.36

0.4

0.38

0.42

New Kent

34

0

2.3

1.3

4.5

2.9

6.8

4.4

8.1

7.6

9.3

8.8

10.4

9.9

12

Prince George

11

0

0.8

0.5

1.5

1

2.3

1.5

3.1

2.6

4.7

4

6.3

5.5

7.5

Williamsburg

0.4

0

0.02

0.01

0.03

0.02

0.05

0.03

0.06

0.05

0.08

0.07

0.11

0.1

0.14

Statewide

1619

21

86

72

167

134

240

197

317

320

459

455

594

583

745

 

Cumulative (total) amount of land below a given elevation

Dry Land

 

54

236

189

479

362

751

585

1029

1060

1707

1708

2332

2283

2830

Nontidal Wetlands

 

21

86

72

167

134

240

197

317

320

459

455

594

583

745

All Land

1619

1694

1941

1881

2265

2115

2611

2401

2965

2999

3785

3782

4545

4486

5193

 

1. Low and high are an uncertainty range based on the contour interval and/or stated root mean square error (RMSE) of the input elevation data. Calculations assume that half of the RMSE is random error and half is systematic error. For a discussion of these calculations, see the EPA report. See also the EPA maps that depict these results.