Abstract:
At present, the main causes of urban waterlogging are that the standard engineering system doesn’t meet the expected functions and the emergency system for excessive rainstorm isn’t be well organized, which lead to the lack of resilience of the system for urban flooding prevention and control(UFPC). In order to solve the focus problem of unclear coordination path between regulation, storage and discharge among the three links of source, midway and end, starting from the resilience connotation of urban waterlogging prevention and control system, this paper analyzes the construction content of urban waterlogging prevention and control engineering system, and puts forward the structure and optimization idea of urban waterlogging prevention and control engineering system. The main conclusions are as follows: (1) The construction of "resilience" of urban engineering system for waterlogging and storage(ESWS) is an effective way to improve urban waterlogging prevention capacity and an important part of resilient city. Unconventional ESWS is one of the important sources to provide "resilience" for UFPC. (2) It is necessary to evaluate whether the capacity of municipal drainage and regional flood drainage is coordinated based on the process of runoff formation and drainage and the coordination degree of "drainage and storage relationship" in the peak period of rainstorm, the design return period of which is consistent with the design standard of the system for UFPC. (3) In the construction of urban waterlogging engineering, it is necessary to focus on the influence mechanism between each subsystem, seek the coordination path between different types of waterlogging control facilities in each link, and minimize the mutual restriction between subsystems. In this paper, the structure of urban ESWS is clarified, and the responsibilities of relevant departments are clearly divided, which can improve the coordination of planning, design and operation scheduling of each waterlogging engineering subsystem.