Table 5 Statistics on the proportion of RSEI grades of cities in northern Anhui from 2001 to 2020.

From: Dynamic monitoring and analysis of factors influencing ecological environment quality in northern Anhui, China, based on the Google Earth Engine

Year

Grade

Bengbu (%)

Huainan (%)

Huaibei (%)

Fuyang (%)

Suzhou (%)

Bozhou (%)

2001

Poor

0.34

1.92

0.00

0.37

0.01

0.05

Fair

8.78

9.21

1.09

3.01

0.68

2.23

Moderate

29.78

12.72

10.03

18.88

7.13

12.05

Good

51.79

43.66

67.75

74.85

79.98

74.35

Excellent

9.31

32.49

21.13

2.89

12.20

11.32

2005

Poor

0.03

0.61

1.62

0.45

0.00

0.01

Fair

3.73

5.79

18.95

13.32

4.10

6.04

Moderate

53.73

40.62

66.34

61.43

55.13

78.15

Good

33.41

49.84

13.09

24.41

37.29

15.80

Excellent

9.10

3.14

0.00

0.39

3.48

0.00

2010

Poor

0.55

0.48

0.71

0.18

0.52

0.23

Fair

6.03

4.15

11.89

2.70

6.26

3.17

Moderate

52.66

20.00

79.24

69.10

75.66

70.88

Good

29.22

62.56

8.16

27.01

17.47

25.72

Excellent

11.54

12.81

0.00

1.01

0.09

0.00

2015

Poor

1.40

1.65

0.64

0.83

0.35

0.27

Fair

17.93

8.05

4.95

7.02

9.36

2.48

Moderate

47.79

14.24

25.51

31.02

34.31

29.18

Good

27.98

43.48

60.68

55.70

44.24

61.68

Excellent

4.90

32.58

8.22

5.43

11.74

6.39

2020

Poor

0.00

0.54

0.01

1.37

0.00

0.00

Fair

2.84

5.57

4.78

6.42

1.77

2.05

Moderate

34.62

16.16

46.12

65.01

32.47

49.88

Good

41.08

50.05

49.06

25.71

65.09

47.81

Excellent

21.46

27.68

0.03

1.49

0.67

0.26

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