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Table 2 Spatial drought trends in % of area coverage n Belg season from 1983–2016

From: Meteorological Drought in Northwestern Escarpment of Ethiopian Rift Valley: detection seasonal and spatial trends

Years

Spatial drought area coverage in % for Belg season

ALOFLZ (1106.19 km2 ) in %

TCLZ (933.56 km2 ) in %

RVLZ (1850.10 km2 ) in %

DF

MD

MOD

SD

ESD

DF

MD

MOD

SD

ESD

DF

MD

MOD

SD

ESD

1983

72.05

27.95

–

–

–

54.26

45.74

–

–

–

98.04

1.96

–

–

–

1984

–

81.45

9.16

–

–

10.72

74.61

14.66

–

–

11.97

75.31

9.95

2.77

–

1985

93.98

6.02

–

–

–

100

–

–

–

–

100

–

–

–

–

1986

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

1987

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

1988

–

100

–

–

–

–

100

–

–

–

14.05

85.95

–

–

–

1989

100

–

–

–

–

97.38

2.62

–

–

–

99.06

0.94

–

–

–

1990

–

10.73

89.27

–

–

–

61.98

38.02

–

–

–

55.57

44.43

–

–

1991

–

6.27

54.58

1.57

17.32

–

49.92

42.66

7.42

–

–

11.44

84.82

3.75

–

1992

93.73

6.27

–

–

–

100

–

–

–

–

100

–

–

–

–

1993

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

1994

–

75.18

24.82

–

–

30.17

69.83

–

–

–

36.00

64.00

–

–

–

1995

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

1996

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

1997

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

1998

1.57

98.43

–

–

–

9.34

90.66

–

–

–

–

100

–

–

–

1999

–

1.57

28.19

–

–

100

–

–

–

–

–

–

–

42.4

57.62

2000

–

100

–

–

–

4.47

95.53

–

–

–

–

100

–

–

–

2001

46.99

53.01

–

–

–

–

45.23

14.96

39.80

–

3.17

86.80

10.02

–

–

2002

36.03

54.80

6.03

–

–

24.89

30.38

28.22

16.50

–

10.47

87.93

1.60

–

–

2003

68.92

31.08

–

–

–

26.82

70.56

2.62

–

–

48.94

51.06

–

–

–

2004

–

43.61

56.39

–

–

–

32.44

67.56

–

–

–

94.02

5.98

–

–

2005

100

–

–

–

–

100

–

–

–

–

50.25

49.75

–

–

–

2006

100

–

–

–

–

100

–

–

–

–

99.06

0.94

–

–

–

2007

–

100

–

–

–

–

100

–

–

–

–

90.45

9.55

–

–

2008

–

36.01

48.33

–

–

7.95

49.24

42.81

–

–

–

3.55

56.20

40.3

–

2009

–

37.59

46.76

–

–

–

18.09

80.07

1.84

–

–

9.17

84.18

6.65

–

2010

62.41

37.59

–

–

–

91.96

8.04

–

–

–

94.26

5.74

–

–

–

2011

100

–

–

–

–

100

–

–

–

–

100

–

–

–

–

2012

28.19

71.81

–

–

–

55.03

44.97

–

–

–

6.64

93.36

–

–

–

2013

–

20.35

21.93

3.13

34.65

–

7.91

16.27

58.65

17.2

–

31.51

61.20

7.30

–

2014

14.10

76.50

9.40

–

–

–

100

–

–

–

–

96.83

3.17

–

–

2015

56.14

43.86

–

–

–

56.93

43.07

–

–

–

38.12

54.50

7.38

–

–

2016

96.87

1.57

–

1.57

17.33

59.65

28.47

2.24

9.64

–

46.61

52.45

0.94

–

–

  1. DF Drought Free, MD Mild Drought, MODModerate Drought, SD Severe Drought, ESD Extremely Severe Drought, (– ) Zero value