A Generalization Method for Complex Plain River Networks with Approximately Consistent Water Storage Relationships

Abstract

The invention discloses a complex plain river network generalization method achieving an approximately-uniform water storage relation. The method includes the steps that river channel geographic information data are obtained and processed; a simulated river network polygon is constructed; total water storage amount parameters of a generalized river network inside the simulated river network polygon are determined; the overlapping width of each simulated river sections of the river network polygon is determined; the width overlapping position of each river section of the river network polygon is determined. The water storage capacity of the generalized river network can be made to be approximately uniform with that of a prototype river network, simulation precision can be effectively improved, and the flood risk is easily analyzed; for the water administrative department in charge, defined data requirements are provided, and therefore data compiling is easily performed in management work of the plain river network; for scientific researchers in the water conservancy industry, the method is adopted for constructing a generalized river network hydrodynamic model, and in this way, it can be avoided that due to excessive dependency on experience, different researchers construct the model at different levels.

Description

technical field [0001] The invention relates to the field of computational hydraulics, in particular to a modeling generalization method of a hydrodynamic model. Background technique [0002] The main water system in the developed southeastern coastal areas of my country is a plain river network. With the acceleration of urbanization in recent years, the impermeability of the underlying surface in many areas has increased significantly, and the process of rainfall production and confluence has accelerated. In order to develop and utilize water resources, humans have built a large number of pumping stations, hubs, and polders, which has also made the water system structure in plain river network areas more complex, increasing the flood risk in these areas. The complex river network hydrodynamic model can provide support for flood forecasting, disaster assessment and flood control decision-making response. The hydrodynamic model of the river network is generally modeled by so...

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Problems solved by technology

However, most of the current research results are based on the personal experience of the staff, and some even ignore low-level rivers directly, and a relatively systematic and complete method system has not yet been formed.

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