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Table 4

Monthly rainfall distributions for the Red Sea Coast (mm)

MonthDistributionAverageCV (%)Skewness
January Gamma (0.79, 13.06) 10.0 114.9 2.42 
February Gamma (0.48, 11.5, 0.06) 5.7 141.5 2.87 
March W (0.83, 7.85, 0.11) 8.7 118.2 2.47 
April LN (2.04, 1.0, 0.11) 12.9 125.8 4.69 
May W (1.12, 12.75, 0.36) 12.8 86.3 1.65 
June LN (2.40, 0.56, 0) 12.8 58.3 1.82 
July Gamma (1.55, 6.94) 10.7 79.4 1.59 
August LN (2.89, 0.57, 0) 20.7 60.4 1.66 
September LN (2.98, 0.53, 0) 22.6 56.0 1.79 
October LN (2.67, 0.85, 0) 21.2 107.4 4.37 
November Gamma (1.33, 8.0) 10.7 87.4 1.72 
December W (0.96, 8.27, 0.28) 8.9 97.8 1.98 
MonthDistributionAverageCV (%)Skewness
January Gamma (0.79, 13.06) 10.0 114.9 2.42 
February Gamma (0.48, 11.5, 0.06) 5.7 141.5 2.87 
March W (0.83, 7.85, 0.11) 8.7 118.2 2.47 
April LN (2.04, 1.0, 0.11) 12.9 125.8 4.69 
May W (1.12, 12.75, 0.36) 12.8 86.3 1.65 
June LN (2.40, 0.56, 0) 12.8 58.3 1.82 
July Gamma (1.55, 6.94) 10.7 79.4 1.59 
August LN (2.89, 0.57, 0) 20.7 60.4 1.66 
September LN (2.98, 0.53, 0) 22.6 56.0 1.79 
October LN (2.67, 0.85, 0) 21.2 107.4 4.37 
November Gamma (1.33, 8.0) 10.7 87.4 1.72 
December W (0.96, 8.27, 0.28) 8.9 97.8 1.98 

W: Weibull; LN: LogNormal; Gamma [1st parameter = shape factor; 2nd parameter = location; 3rd parameter: threshold value].

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