Table 12.2
Mean monthly, seasonal, and annual rainfall statistics over Sahibi Basin in Rajasthan (1961–2017)
Time
Rainfall
(mm)
Standard
deviation
Coefficient of
variation (%)
Kurtosis Skewness
Contribution to annual
rainfall (%)
MK
Sen’s
Slope
Regression
January
8.99
10.96
121.90
2.68
1.61
1.42
0.98
0.03
0.39
February
13.48
20.08
148.98
7.20
2.52
2.13
0.28
0.00
0.23
March
8.30
16.78
202.23
23.52
4.35
1.31
1.63
0.04
0.03
April
7.29
10.86
148.99
4.17
2.07
1.15
1.21
0.01
0.31
May
22.19
24.31
109.54
6.27
2.28
3.50
1.49
0.19
0.21
June
64.46
66.06
102.47
14.13
3.21
10.17
2.88**
0.82** 0.04
July
198.08
109.12
55.09
1.35
0.92
31.25
À1.09
À0.89
0.21
August
199.96
104.00
52.01
2.82
1.14
31.54
À1.30
À1.06
0.21
September
91.53
65.93
72.04
À0.88
0.35
14.44
0.65
0.35
0.63
October
11.45
22.01
192.32
10.46
3.10
1.81
0.25
0.00
0.99
November
3.71
6.85
184.60
2.68
1.90
0.59
À
À
0.46
December
4.52
9.12
201.75
8.25
2.77
0.71
À
À
0.30
Winter (January–
February)
22.47
23.55
104.84
2.87
1.65
3.54
1.27
0.14
0.15
Pre-monsoon (March–
May)
37.78
36.02
95.36
4.00
2.00
5.96
2.58**
0.43** 0.03
Monsoon (June–
September)
554.03
197.23
35.60
0.94
0.62
87.39
À0.56
À0.66
0.61
Post-monsoon
(October–December)
19.68
28.78
146.28
12.16
3.15
3.10
À1.04
À0.09
0.62
Annual
633.95
204.93
32.33
0.66
0.66
100
0.00
0.00
0.98
**
Significant at 99% confidence level
12 Trends and Pattern of Rainfall over Semiarid Sahibi Basin in Rajasthan, India
281
Mean monthly, seasonal, and annual rainfall statistics over Sahibi Basin in Rajasthan (1961–2017)
Time
Rainfall
(mm)
Standard
deviation
Coefficient of
variation (%)
Kurtosis Skewness
Contribution to annual
rainfall (%)
MK
Sen’s
Slope
Regression
January
8.99
10.96
121.90
2.68
1.61
1.42
0.98
0.03
0.39
February
13.48
20.08
148.98
7.20
2.52
2.13
0.28
0.00
0.23
March
8.30
16.78
202.23
23.52
4.35
1.31
1.63
0.04
0.03
April
7.29
10.86
148.99
4.17
2.07
1.15
1.21
0.01
0.31
May
22.19
24.31
109.54
6.27
2.28
3.50
1.49
0.19
0.21
June
64.46
66.06
102.47
14.13
3.21
10.17
2.88**
0.82** 0.04
July
198.08
109.12
55.09
1.35
0.92
31.25
À1.09
À0.89
0.21
August
199.96
104.00
52.01
2.82
1.14
31.54
À1.30
À1.06
0.21
September
91.53
65.93
72.04
À0.88
0.35
14.44
0.65
0.35
0.63
October
11.45
22.01
192.32
10.46
3.10
1.81
0.25
0.00
0.99
November
3.71
6.85
184.60
2.68
1.90
0.59
À
À
0.46
December
4.52
9.12
201.75
8.25
2.77
0.71
À
À
0.30
Winter (January–
February)
22.47
23.55
104.84
2.87
1.65
3.54
1.27
0.14
0.15
Pre-monsoon (March–
May)
37.78
36.02
95.36
4.00
2.00
5.96
2.58**
0.43** 0.03
Monsoon (June–
September)
554.03
197.23
35.60
0.94
0.62
87.39
À0.56
À0.66
0.61
Post-monsoon
(October–December)
19.68
28.78
146.28
12.16
3.15
3.10
À1.04
À0.09
0.62
Annual
633.95
204.93
32.33
0.66
0.66
100
0.00
0.00
0.98
**
Significant at 99% confidence level
12 Trends and Pattern of Rainfall over Semiarid Sahibi Basin in Rajasthan, India
281