Urban rainstorm waterlogging fine simulation method

Abstract

The invention discloses an urban rainstorm waterlogging fine simulation method, which comprises the following steps of calculating a rainstorm process line of a design surface in each time period according to rainstorm actual measurement data of a calculated region; extracting elevation points according to the requirements of flood analysis and calculation on the terrain, and checking and correcting the extracted elevation points; subjecting the construction pit and the piled soil in the urban construction site to depression filling and leveling treatment respectively; determining inner and outer boundaries of the calculated region; dividing the calculation area into grids, and carrying out property division on the land; determining the water pumping and draining capacity; determining a roughness factor, a runoff coefficient, a source, a confluence item, a dry and wet boundary in the model, and calculating time, a step length and an output parameter; and carrying out model validation.According to the method, the urban rainstorm waterlogging refined model is established, various factors influencing the rainstorm waterlogging in the urban area are comprehensively considered, the evolution process of the urban rainstorm waterlogging is analyzed and studied, the disaster management level of the government can be improved, and the disaster influence of the urban rainstorm waterlogging is reduced to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of emergency disaster prevention, in particular to a refined simulation method for urban rainstorm and waterlogging. Background technique [0002] Urban torrential rain and waterlogging refers to the phenomenon that concentrated precipitation occurs in a short period of time, resulting in water accumulation disasters and related secondary disasters in the city. With the progress and development of the economy and society, urbanization continues to advance. For the better life of urban and rural residents and the more harmonious and orderly development of the society, it is imminent to solve the problem of urban waterlogging. The risk analysis of urban rainstorm and waterlogging disasters is the management of urban waterlogging disasters, which can effectively reduce the losses of waterlogging disasters. [0003] Domestic urban storm and flood models often only study one-dimensional river network models, two...

AI Technical Summary

Problems solved by technology

[0003] Domestic urban rain and flood models often only study one-dimensional river network models, two-dimensional unsteady flow models or pipe network models, and seldom study the integration and coupling between models. The accuracy of terrain data is directly related, and urban drainage systems (such as pipe networks, pumping stations) and typical urban features such as housing buildings and urban roads are the main factors affecting the process of rainwater confluence, directly affecting the evolution of waterlogging

[0004] At present, there are few researches on refined hydrodynamic models of urban rainstorm and waterlogging that comprehensively consider multiple factors, so it is of practical significance to establish a refined model of urban rainstorm and waterlogging

Images