基于SWMM和层次分析法的调蓄池预选址方案选择

近年来频发的内涝给城市排水防涝带来严重挑战。调蓄池是城市内涝防治系统的重要组成部分,而调蓄池预选址的选择,关系到调蓄池的效益和成本,也影响后续优化求解。为合理选择调蓄池的潜在位置,根据内涝防治标准,基于SWMM模型,选取积水深度、积水范围、积水时间、调蓄池造价、节点重要性等5项指标,借助层次分析法,建立了量化评价框架,探讨了基于预选址指数的雨水系统调蓄池预选址方案的选择方法,并进行了应用案例验证,研究表明:调蓄池的位置选择对内涝积水削减比例有重要影响;所提出的方法有一定的可行性和实用性,借助该方法可以得到较好的预选址方案。本研究成果可为城市内涝防治调蓄池选址工作提供技术支撑。

Scheme selection of pre location for storage tanks based on SWMM and analytic hierarchy process

In recent years, frequent urban flooding has brought serious challenges to urban drainage & flood prevention. Storage tank is an important part of urban flood control system. The selection of storage tank pre location-selection is related to its benefit and cost, and also affects the subsequent optimal solution. Based on the SWMM model, five indicators, including flood depth, flood area, flood duration, storage tank construction cost and node importance, were selected according to the flood prevention and control criteria. With the aid of the Analytic Hierarchy Process (AHP), the quantitative evaluation framework was established. The approach of pre location-selection scheme of storm water storage system based on pre location-selection index was discussed and verified by a case study. The results showed that, the storage location selection had significant influences on the proportion of flooding reduction. The proposed method was feasible and practical, and better pre location scheme could be obtained using this method. This study can provide technical supports for the site selection of storage tank in urban flood control.