IDF Values for Frequent Storms

 

 

For design ARI 1, 3, 6 month and 1 year, the design rainfall is calculated using equation 13.5 (a), (b), (c) and (d):
 
 ……………………………Equation 13.5 (a)
 
 ……………………………..Equation 13.5 (b)
 
 ……………………………….Equation 13.5 (c)
 
…………………………………..Equation 13.5 (d)
 

where,

  

, ,  and are required 1, 3, 6 month and 1-year ARI rainfall intensities for any duration D, and  is the 2-year ARI rainfall intensity  for same duration D, obtained from IDF curves. 
 

 
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