Coupling method and system for one-dimensional hydrodynamic model and two-dimensional hydrodynamic model

Abstract

The invention relates to a coupling method and system for a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model. The method comprises steps that the one-dimensional hydrodynamic model is constructed; wherein the one-dimensional hydrodynamic model comprises a one-dimensional river network water flow mathematical model; a two-dimensional hydrodynamic model is constructed to simulate two-dimensional shallow water flow of an earth surface; and according to the one-dimensional hydrodynamic model and the two-dimensional hydrodynamic model, a corresponding one-dimensional andtwo-dimensional hydrodynamic model coupling mode is carried out for various river section forms. According to the method, a one-dimensional and two-dimensional coupled hydrodynamic model is adopted, the influence of urban buildings, trees and other plants on flood propagation can be fully considered, and hydrodynamic models of different scales and different dimensions are coupled according to theone-dimensional flow characteristics of a river channel and the two-dimensional flow characteristics of a lake; and flood influence degree and range simulation and prediction under different flood frequencies are carried out. The urban water regime situation can be perceived, the water level information is collected in combination with an upstream sensing instrument, and the aims of reducing the discharge peak flow and achieving flood recycling are achieved in combination with gate dam dispatching.

Description

technical field [0001] The invention belongs to the technical field of hydrodynamic analysis, and in particular relates to a coupling method and system of a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model. Background technique [0002] In related technologies, there are many coupling methods between one-dimensional and two-dimensional models, and the existing research can be roughly divided into lateral coupling, overlapping coupling and boundary lap coupling. Lateral coupling and overlapping coupling are suitable for the joint simulation of the river network and its side floodplain, or the detailed simulation of water flow in the area of ​​concern at the local terminal under the overall framework of the river network. The boundary overlap coupling realizes overlap coupling at the respective calculation boundaries for the one-dimensional and two-dimensional computing domains. [0003] According to the difference of the coupling connection method,...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art, and provide a coupling method and system for a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model, so as to solve the problems of the one-dimensional hydrodynamic and two-dimensional hydrodynamic problems in the prior art. The problem that the dynamic model has flaws in the coupling

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