Analysis and Optimization of Sponge Construction Scheme in Industrial Plant Area Based on SWMM Model:Taking a Factory in Qingdao as an Example
The industrial plant area has a high construction density but a low green land rate, and the comprehensive runoff coefficient of the site is high, so the difficulty of construction and transformation of sponge city is relatively high. The research objective is to take a factory in Qingdao city as an example, to comprehensively evaluate the rainwater system scheme of the sponge factory construction project by using storm water management model ( SWMM ) , and to systematically evaluate the rainwater control and utilization effect of the rainwater system under the design rainfall and multi-year rainfall conditions before and after development, and after the source facilities are adopted of the sponge factory project. The results show that after the addition of source facilities, the discharge of each outlet decreased, and the peak reduction of drainage outlet corresponding to the service area of the reservoir reached 30. 28％, and the reduction rate of discharge flow reached 17. 84％, but the total annual runoff control rate of the site was only 45. 05％. According to the simulation results, the plant rainwater system scheme was optimized, the pipe diameter was adjusted, the sunken green area was increased and the volume of the reservoir was added, so as the control effect of the plant area on the roof and ground runoff is improved further, and the total annual runoff control rate reached 75. 05％. The study could provide reference and basis for the future planning and design of the same type of sponge industrial plant area.
sponge citystorm water management model ( SWMM )low impact development ( LID ) facilitiessponge transformationindustrial area
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