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| Campus rainwater control and benefit analysis based on low impact development |
| WANG Xing1,2, RONG Guiwen1, SUN Shuangke2, ZHENG Tiegang2*, HU Liangyu1 |
| 1. College of Earth and Environment, Anhui University of Science and Technology, Huainan, Anhui 232001, China;2. Sate Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China |
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Abstract Taking Anhui University of Science and Technology as the research object, the storm water management model(SWMM)was constructed by using four low impact development(LID)schemes(grass swale, sunken green space, rainwater tank and grass swale-sunken green space-rainwater tank combination)to simulate the hydrological and water quality performance of various LID schemes under different rainfall recurrence periods, and the economic benefits were evaluated. According to the results, the runoff reduction efficiency of grass swale is the best, which can delay the peak time of flow and reduce the pollution load. Except the rainwater tank, the other three LID schemes have good environmental benefits. If better pollutant control effect is wanted to achieve, more cost is needed to invest, sunken green space or combination LID scheme can be used, which can effectively reduce peak flow, alleviate urban drainage network load, and reduce the effect of pollutants better. It can provide theore-tical support for the application decision of LID practices in Chinese campuses.
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Received: 08 June 2020
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