EVALUATION OF WATER AVALIABILITY IN CLIMATE CHANGE SCANARIOS
Rainwater harvesting. Climate change. Reliability. Water savings. Water security.
As a result of the continuous climate change in many environmental system, rainwater harvesting system(RWHS) has received notable attention as an alternative way of decrease water vulnerability. In general, the design and performance of a RWHS is determined by using historical rainfall data without the impacts of climate change on rainfall. The objective is to investigate the effects of climate change in a domestic rainwater harvesting system based on different combinations of roof-surface, rainwatertank sizes and water demands. The water balance in the tank will be simulated applying yield-after-spillage criteria, located in the northeast Brazil. It is expected that the findings help water authorities and policy makers to select appropriate rainwater tank size in the context of climate change. Each scenario analyzed will be a resource of how changes in precipitation standard will impact water availability. The performance will be presented as a estimation of Reliability, Water savings, and Water security in the system.