１．Rainfall intensity coefficients(I) has been calculated

I = K K= non dimensional coefficient
(t+b) t= time of concentration in minutes
( mm/hour) b= non dimensional coefficient

Freq. K b
SI Customary
unit units
1yr ? ? ? ←Let me know blanks data
5yr 2443 96.2 27.5
10yr 2941 115.8 24.9
25yr 3420 134.6 23.7
50yr 3810 150.0 21.0
100yr 4300 169.3 20.0