Query
What rainfall data should be used for RWH calculations inCriterion 18? Kindly help regarding the details in terms of number of years, and the value to be considered(hourly, daily, monthly average etc.).
Solution
For the rainwater harvesting system to function well, it is recommended that the recharging pit should be designed based on average of peak hourly rainfall for 3-5 years and the storage system should be designed based on average of peak daily rainfall for 3-5 years.