Study on the Economical Volume for Rainwater

• Published in: Proceedings of the 2008 International Low Impact Conference Vol. 333; pp. 1 - 9
• Main Authors: Che, W, Pan, G Q, Li, J Q, Li, H Y, He, J P, Wang, H L
• Format: Conference Proceeding Book Chapter
• Language: English
• Published: 01-11-2009
• ISBN: 0784410097; 9780784410097
• DOI: 10.1061/41009(333)31

On basis of a bigger drainage area, the standard for rainwater harvesting quantity should or amend water circle system and eco-environment, the suitable runoff closed to the natural condition after rainwater harvesting. For harvesting systems of some smaller watershed the and economical harvesting volume is important. In special situations integral stormwater management with higher efficiency should be adopted to required bigger design return period. When water compared with the runoff in a given project is the volume of a rain tank could be determined a 24h rainfall, and rainfall return period for should not lager than 0.3 years, and design storm should not lager than 50mm for all cities in or using water quality volume for design storm When runoff in a practical project is sufficient small daily water consumption, the storage volume be designed according to water quantity for 5 water consumption. For those projects with water body with great storage capacity, the volume should be confirmed by water balance on the basis of an average year.