Distributed direct two-way coupling method for earth surface and pipe network

Abstract

The invention provides an earth surface and pipe network distributed direct two-way coupling method, which comprises the steps of collecting hydrodynamic data of surface hydrology, and further comprises the following steps: generating an earth surface model and a pipe network model according to the hydrodynamic data of the surface hydrology, the earth surface model being an earth surface distributed hydrodynamic model; and on the basis of the surface model and the pipe network model, a coupling mode between the surface model and the pipe network model is constructed according to the actual composition of the urban drainage pipe network and the data coverage situation, and the coupling mode at least comprises physical coupling and concept coupling. The invention provides a novel distributed direct two-way coupling mode, namely a coupling mode of rainfall-earth surface-pipe network (Sewer), under the mode, the earth surface adopts a distributed hydrodynamic model, rainfall directly acts on earth surface grids, rainfall runoff generation and confluence and accumulated water flooding are calculated based on the unified earth surface grids, and therefore, the accuracy of the rainfall runoff generation and confluence and accumulated water flooding can be improved. Meanwhile, the surface model and the pipe network model are bidirectionally coupled.

Description

technical field [0001] The invention relates to the technical field of municipal engineering, in particular to a distributed direct two-way coupling method between the ground surface and a pipe network. Background technique [0002] In the process of urban storm flood simulation, the coupled calculation of the surface model and the pipe network model has always been one of the key points and technical difficulties. The existing urban storm flood simulation model mainly adopts the model of Rainfall-Catchment-Sewer-Overland (hereinafter referred to as RCSO). According to this model, the sub-basin must be divided according to the position of the inspection well in the drainage pipe network system, and then the rainfall directly acts on the sub-basin, and then the sub-basin rainfall production and flow model is used to calculate the yield of the sub-basin. The production flow is directly added to the pipeline network model through the inspection well. When the pipe network ins...

AI Technical Summary

Problems solved by technology

The shortcoming of the coupling method between the ground surface and the pipe network shown in this article is that it does not distinguish the different functions of the inspection well and the rainwater grate in the actual drainage pipe network system. In fact, the inspection wells in the urban drainage system are covered by cover plates. , not in an open state, the water exchange between the surface and the drainage pipe network is mainly done through the rainwater grate, and the rainwater grate and the inspection well must be treated separately

In addition, the coupling method between the surface and the pipeline network shown in this article is not suitable for areas with insufficient pipeline network data

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