基于Infoworks ICM模型在内涝风险评估和海绵减控效果中的应用

Application of Information on Waterlogging Risk Assessment and Sponge Reduction and Control Effect Based on Infoworks ICM Model

摘要: 以中部城市A市海绵专项规划为例，介绍了基于Infoworks ICM 模型在排水管网负荷评价、内涝风险评估以及海绵城市规划中的应用。新技术的应用为排水管网优化设计提供新的设计思路，制定了内涝风险多要素的综合评价体系，量化了海绵减控效果的分析。分析结果，优化方案管网在满足设计要求P = 2a重现期下能够适当超负荷压力运行，充分发挥管网排水潜能；多因素的综合评价体系划定了研究区域内涝风险等级和范围；通过组合LID海绵措施在不同降雨强度下径流总量控制率达到67%~78%，对冲刷污染物SS的控制率为64.2%，较无LID措施开发情况下显著提高。

Abstract: Taking the sponge special planning of City A in the central city as an example, the application of the Infoworks ICM model in drainage pipe network load evaluation, waterlogging risk assessment and sponge city planning is introduced. The application of new technology provides new design ideas for the optimal design of drainage network, establishes a comprehensive evaluation system of multiple factors of waterlogging risk, and quantifies the analysis of sponge reduction and control effect. Simulation analysis results show that the pipeline network of the optimized scheme can operate at appropriate overload pressure under the recurrence period of P = 2a to meet the design requirements, and give full play to the drainage potential of the pipeline network; the multi-factor comprehensive evaluation system delineates the risk level and scope of waterlogging in the study area; Through the combination of LID sponge measures, the total runoff control rate under different rainfall intensities reaches 67% to 78%, and the control rate of the scouring pollutant SS is 64.2%, which is significantly improved compared with the development without LID measures.