Stormwater Runoff Control and Water Resource Utilization Technology of Central China Normal University Based on Stormwater Flood Management Modeling

Abstract

In recent years, more and more prominent urban flooding problems on campus drainage system planning and design put forward higher requirements. Sudden rainfall can have multiple negative impacts on campuses, but it is also an excellent opportunity to utilize rainwater resources. At present, the peak flow rate of urban drainage system in China is still mainly calculated by the inference formula method, and the design return period of municipal drainage system is also low, which may lead to campus flooding in case of large rainstorms. In this paper, using the Stormwater Flood Management Model (SWMM) as a platform, the Central China Normal University (CCNU) was selected to simulate the summer stormwater runoff process, and three different combinations of low-impact development (LID) facilities were applied to the campus stormwater runoff control, and the control effects of the different combinations on the flood peak flow abatement were compared. The results show that the selected LID deployment scheme is better than the single facility control effect. Finally, based on the results of the study, a technical solution for rainwater collection and reuse based on sponge campus was proposed to renovate and design the campus landscape of Central China Normal University. The economic, social and environmental benefits are significant and can provide a reference for rainwater collection on other campuses.