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

Table 4

Rainfall intensity quantiles for different return periods.

Return period (year)	2	5	10	20	40	50	100
Rainfall duration (h)	Rainfall intensity (mm/h)
1	60.5	75.5	85.4	94.9	104	107	116
2	38.4	48.2	54.8	61	67.2	69.1	75.2
3	27.3	34.9	40	44.9	49.7	51.2	55.9
6	14.8	19.7	22.1	24.8	27.5	28.4	31.1
12	8.0	10.5	12.1	13.5	15	15.4	16.8
24	4.2	5.46	6.26	7.01	7.7	8	8.7