基于SWMM和MIKE模型的机场飞行区雨水管网及内涝风险评估

Rainwater Pipe Network and Waterlogging Risk Assessment of Airport Traffic Area Based on SWMM and MIKE Model

南方某机场正在开展新一期飞行区扩建工程,为分析扩建工程区域内排水能力和识别内涝风险,在设计阶段采用SWMM模型和MIKE模型进行内涝模拟和雨水管网系统评估。评估工作在掌握区域地理特点、下垫面条件、降雨资料和管网分布情况等资料的基础上,通过构建模型,分别对5年一遇、10年一遇120 min持续强降雨工况下的管网过流能力进行了评估,并对100年一遇的内涝积水风险进行了系统评估。评估结论显示,飞行区扩建站坪部分外围管渠存在过载现象,有一定的溢流风险;在100年一遇降雨条件下,部分节点有积水现象。如果将该评估结论应用于雨水管网设计修改中,即可消除雨水管网不达标的风险。

A new airport traffic area expansion project is carrying out in an airport in south China. In order to analyze the drainage capacity in the expansion area and identify the risk of waterlogging, the SWMM model and the MIKE model are used in the design stage to simulate waterlogging and evaluate the rainwater pipe network system. Based on the regional geographic characteristics, underlying surface conditions, rainfall data and pipeline networks distribution, the models are built. Under the working conditions of 5-year and 10-year 120-min continuous heavy rainfall respectively, the carrying capacity of the pipe network are evaluated. The risk of 100-year waterlogging was systematically evaluated. The evaluation shows that there is a certain risk of overflow because of the overload in some peripheral canals of the expansion area;Under the condition of 100-year rainfall, water accumulation occurs at some nodes. If the evaluation is applied to the design, the risk of rainwater pipe network will meet the standards.