Table 4 Mann Kendall and Sen’s Slope analysis of rainfall
Rainfall (mm) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Month | Ondo | Ogun | Kwara | |||||||||
S | Z | Trend | Slope | S | Z | Trend | Slope | S | Z | Trend | Slope | |
January | 65 | 0.91 | 0.000 | −4 | −0.04 | – | 0.000 | −5 | −0.07 | 0.000 | ||
February | 32 | 0.43 | 0.000 | 65 | 0.87 | 0.167 | −20 | −0.31 | 0.000 | |||
March | 28 | 0.37 | 0.529 | 91 | 1.23 | 0.890 | −81 | −1.24 | −0.690 | |||
April | −46 | −0.61 | −0.725 | 11 | 0.14 | 0.000* | 84 | 1.29 | 1.429 | |||
May | −83 | −1.12 | −0.920 | 83 | 1.12 | 1.317 | 8 | 0.11 | 0.058 | |||
June | 75 | 1.01 | 1.053 | 73 | 0.98 | 1.742 | 42 | 0.64 | 0.704 | |||
July | 87 | 1.22 | 2.746* | 40 | 0.53 | 0.938 | 58 | 0.88 | 0.974 | |||
August | 65 | 0.87 | 1.523 | 29 | 0.38 | 0.628 | −21 | −0.31 | −0.324 | |||
September | 26 | 0.34 | 0.361 | 127 | 1.72 | 3.026 | 66 | 10.1 | + | 1.529 | ||
October | −67 | −0.90 | −1.146 | 101 | 1.36 | 2.000 | 160 | 2.46 | + | 3.994 | ||
November | 98 | 1.32 | 0.563 | 185 | 2.51 | + | 1.375 | 1 | 0.00 | 0.000 | ||
December | −36 | −0.52 | 0.000 | 42 | 0.59 | 0.000 | −11 | −0.22 | 0.000 | |||
Overall | 48 | 0.64 | 1.297 | 113 | 1.59 | 12.667* | 69 | 1.05 | 4.000 | |||