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

A high-precision, surface model technology, applied in general water supply conservation, climate change adaptation, design optimization/simulation, etc., can solve problems such as poor real-time performance, insufficient immersion, inability to perform accurate spatial positioning, and improve simulation accuracy. and efficiency, the effect of improving simulation accuracy

Active Publication Date: 2018-10-09
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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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 mo...

Method used

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

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Embodiment 1

[0044] figure 1 It is a flow chart of the steps of the method for simulating and visualizing the water flow and quality of the non-uniform high-precision curved surface grid provided by the embodiment of the present invention.

[0045] refer to figure 1 As shown, the specific steps include:

[0046] S101: Generate a high-precision surface grid according to the topographic data of the river channel.

[0047]Using the pre-acquired scattered point data of the river topography and the boundary of the research area, select a preset spatial grid scale, and establish a high-precision surface model of the river topography according to the spatial grid scale; for the high-precision surface model of the river topography Carry out discrete solution to generate the initial topographic high-precision surface mesh M 1 .

[0048] The high-precision surface model is as follows:

[0049] According to the basic definition of surface theory (Somasundaram, 2005), when the first basic quantit...

Embodiment 2

[0174] figure 2 The structural block diagram of the non-uniform high-precision curved surface grid water flow and water quality simulation and visualization system provided by the embodiment of the present invention.

[0175] refer to figure 2 As shown, the non-uniform high-precision curved surface grid water flow and water quality simulation and visualization system provided in this embodiment specifically includes a data acquisition module 10, a curved surface modeling module 20, a layered modeling module 30, a model calculation module 40 and a virtual simulation module 50.

[0176] The data acquisition module is used to acquire the scattered point data of the river topography, and the scattered point data includes some or all of the terrain data, boundary condition data, satellite remote sensing data, vector data, engineering design data and texture data.

[0177] The surface modeling module is used to generate high-precision surface meshes based on river terrain data. ...

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Abstract

The embodiment of the invention provides a non-uniform high-precision curved surface grid water flow water quality simulation and visualization method and a system. The method and system are specificas following: firstly, the preset spatial scale is selected from the obtained river topographic data, and the high-precision surface model is established to a high-precision curved surface grid M1 ofa river channel; secondly, the grid unit which satisfies the terrain gradient change condition and the key research area in the M1 is subjected to a division and encryption process to generate a layered high-precision curved surface mesh M2; moreover, the two-dimensional water flow and water quality models are solved by two-dimensional discrete solution, and in that model calculation, the M2 can be used for dynamically dividing and merging the grid unit which meets the condition according to the change state of the water quality and the water flow; finally, the water flow and the water qualitystate information are visualized and mapped by the constructed three-dimensional virtual simulation platform to realize the visual simulation of the water flow and water quality based on the three-dimensional virtual environment. Therefore, the support platform can be provided for the implementation of the flood control disaster reduction, the water environment protection and the river long system and the most strict water resource 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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40Y02A20/152
Inventor 冶运涛梁犁丽曹引蒋云钟顾晶晶龚家国王建华杜军凯
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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