online_rational_composite:   Peak discharge for a composite catchment using the rational method

INPUT DATA:     [Description]     [Example]

Select:     


Drainage area Aa :     

Runoff coefficient Ca :      

Time of concentration tca :       min


Drainage area Ab :      

Runoff coefficient Cb :      

Time of concentration tcb :       min


Return period T :       yr


OUTPUT:

Qp  =  I  (C A)

Peak discharge Qp :     

Design rainfall duration trd :     



IDF Formula:

       k T n
I  =  _______________
       (tr  +  b)m


Coefficient k :  

[Leave blank to set default k = 1000]

Exponent n :  

[Leave blank to set default n = 0.2]

Coefficient b :  

[Leave blank to set default b = 20]

Exponent m :  

[Leave blank to set default m = 0.7]


            

  Your request was processed at  01:56:00 pm on June 24th, 2017   [ 170624  13:56:00 ]    [140403]