Basin

Land Cover

Percentage of Land cover

1939

1953

1971

1995

2008

BC 1

Agricultural lands

30

28

30

31

28

Bare and paved surface

2

6

3

3

2

Herbaceous grasslands

31

16

16

19

23

Open water

0

4

1

1

1

Pasture

24

27

23

22

20

Shrubs and brush rangelands

15

20

26

25

27

DC 3

Agricultural lands

0

15

8

11

23

Bare and paved surface

10

11

20

11

6

Deciduous forests

5

7

6

21

8

Herbaceous grasslands

26

28

31

10

28

Open water

0

2

4

10

0

Pasture

38

14

32

33

12

Shrubs and brush rangelands

21

24

0

5

24