(#7931) Calculation for peak runoff rate and quantity


1. What is GRIHA standard and method of calculation for post-development peak runoff rate and quantity from 5 year and 2 year, 24 hour design?

2. How to calculate and represent that SUDS incorporated on site is managing 90% of the storm water quantity?


1. Peak rainfall intensity of the past 2yrs or 5yrs needs to be considered with 24hr rains for calculation.

2. The area planned under SuDS should be able to cater to 90% of the quantity of storm water that is being generated on site and this is to be demonstrated through calculations.


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