A Simulation Method for Urban Agglomeration Drainage Process

Abstract

The invention discloses an urban agglomeration drainage process simulation method. The method comprises the following steps: (1) conceptual urban agglomeration hydrological unit division; (2) simulating an urban catchment zero-dimensional area and accumulated water; (3) rainwater well generalization and communication; (4) solving the communication relationship between the rainwater well and the pipeline; and (5) coupling with a peripheral pipeline or river network model. According to the method, the contradiction between precision and efficiency of urban runoff and runoff simulation in large scales of regions and drainage basins is solved, high-precision simulation can be carried out on urban inland inundation, backflow and other drainage processes in the time period required by urban group flood prevention and drainage, and the heterogeneity influence of the model in different simulation scales can also be reduced.

Description

technical field [0001] The invention relates to a hydrological simulation method, in particular to a simulation method for urban agglomeration drainage process. Background technique [0002] The coupling of traditional urban hydrological and hydrodynamic models mainly includes: the precipitation-interception-evaporation-infiltration-runoff module of the urban hydrological response unit, the surface confluence module, the pipe network confluence module, and the one-dimensional hydrodynamic module of the river network and water system. For urban flood research, it is necessary to establish a two-dimensional hydrodynamic module to simulate the surface submersion process and the connection process of the drainage pipe network and river and lake water systems, so as to truly simulate the water surface in different terrain conditions such as roads, residential areas, green spaces, and rivers. Flowing process. Such as SWMM model, InfoWorks model, MIKE model, etc., the core part is...

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Problems solved by technology

[0003] However, the hydrodynamic method requires more data and takes longer to calculate

In the scale process of flood simulation from urban areas to watersheds, there is a clear contradiction between high-precision simulation requirements and computational efficiency, and it is impossible to effectively simulate the flow generation and confluence process of the entire city or urban agglomeration through a two-dimensional grid, so it is rarely used in floods Rapid forecast and evaluation of

On the other hand, in the coupling part with the surrounding river network model, the traditional drainage model mainly considers the waterlogging caused by the accumulation of rainwater due to the insufficient drainage capacity of the pipeline in the urban area. This makes this model inapplicable in large-scale calculations

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