Abstract
Recently, in the wake of drought occurrence, the necessity of promoting comprehensive water resources development not only including river water, also groundwater and reuse of treated domestic wastewater has pointed out. Regarding reuse of treated domestic wastewater, as its water resources is relying on rain water and life sewage water, in case of drought, it has lower safety degree of water use due to scarce rainfall and the implementation of water conservation. This study shows the safety of water utility about the reuse of treated domestic wastewater. We have modeled the status of Fukuoka City water project promoting the use of reclaimed wastewater and the rainwater utilization. We numerically evaluate the effects of reuse of treated domestic wastewater and estimated the available amount of it in the future.
