Assessing the Return Periods and Hydroclimatic Parameters for Rainwater Drainage in the Coastal City of Cotonou in Benin under Climate Variability

Table 5

Montana coefficients for different return periods.

Return period (year)	2	5	10	20	40	50	100
a	65.96	82.77	93.71	104.42	114.89	118.26	128.61
b	0.85	0.83	0.83	0.83	0.83	0.83	0.82