Non-uniform high-precision surface grid water flow and water quality simulation and visualization method and system

Abstract

The embodiment of the present invention provides a non-uniform high-precision surface grid water flow and water quality simulation and visualization method and system. Specifically, the method and system are as follows: firstly, using the obtained river channel terrain data to select a preset spatial scale, establish and solve a high-precision surface model, and generate River channel high-precision surface mesh M 1 ; Second, for M 1 The grid units that meet the terrain gradient change conditions and the key research areas are subdivided and encrypted to generate a layered high-precision surface grid M 2 ; Furthermore, based on M 2 Discretely solve the two-dimensional water flow and water quality model, in the model calculation, M 2 According to the changing state of the water flow and water quality, the grid cells that meet the conditions can be dynamically divided and merged; finally, the constructed 3D virtual simulation platform is used to visually map the water flow and water quality status information to realize the visual simulation of the water flow and water quality based on the 3D virtual environment. In this way, it can provide a support platform for the implementation of flood control and disaster reduction, water environment protection, river chief system and the strictest water resources management system.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a non-uniform high-precision curved surface grid water flow and water quality simulation and visualization method and system. Background technique [0002] In the process of numerical simulation of water flow and water quality, the generalization accuracy of terrain in the calculation domain and the adaptability of calculation grid cells to the change of water flow and water quality have a great influence on the simulation results. In actual engineering, the calculation domain often includes narrow channel areas and dikes with significant topographical changes, relatively flat channel beaches, and large floodplains. Modeling with a unified grid will fail to balance the calculation efficiency and accuracy of the model. At present, the processing of the underlying surface in complex terrain areas is rarely involved in water flow and water quality simulation, a...

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Problems solved by technology

In actual engineering, the calculation domain often includes narrow river channel areas and dikes with significant terrain changes, relatively flat river channel beaches and large floodplain areas. Using unified grid modeling will not be able to balance the calculation efficiency and accuracy of the model

At present, the processing of the underlying surface in complex terrain areas is rarely involved in the current water flow and water quality simulation, and the existing pre-processing software is usually used for modeling. The modeling method used by these software is mainly based on the inverse distance weighting method, and the modeling accuracy cannot be guaranteed.

Most water flow and water quality simulation calculations use visualization after the calculation is completed, and most of them are two-dimensional visualization, which lacks real-time intervention methods for the calculation process and visualization lacks the real environment, making it impossible to perform accurate spatial positioning, lack of immersion, and real-time performance. Not strong

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