Study on Rainwater Utilization of Building District in Water Shortage City of Northern China

The utilization of rainwater is essential to improve ecological environment of sub-district, and is one of main approaches to achieve sustainable water resources.Taking rainwater collection and utilization of Beifang Garden district as an example in Fuxin city of northeast China, water quality analysis and water quantity balance calculations are completed, also the feasibility and necessity of rainwater utilization are analyzed. We had also measured the rainwater quality from the roof and the road in the different intensity of rainfall, and summarized the pollution characteristics and quality of rainwater runoff, then determined the best rainwater treatment process. The factors influencing coagulation effect are researched by single factor analysis and orthogonal experiment. It has offered a comparatively reliable reference data for construction of rainwater utilization engineer.