Abstract
Recently environment-friendly public works are demanded. We evaluated an advantage of the utilization of rainwater and treated domestic wastewater in urban area. The rainwater utilization is the use of rainfall on the roofs and collected runoff storm water in the storm water reservoir for flood controls. In the reuse of treated domestic wastewater, wastewater from the raw sewage is not reused. That is “Domestic Water Recycling System”. Water dispersion system (the use of rainfall on the roofs recycling system) are effective in the decrease of the resources consumption and the environmentaloads.
