地下水數(shù)據(jù)可視化方法的研究
[Abstract]:Groundwater buried in the loose sedimentary strata below the surface has the characteristics of good water quality and excellent utilization value. According to the groundwater data, the variation law of groundwater can be effectively understood, and the visualization of groundwater data is the main method to show the hydrogeological situation of groundwater and reflect the change of monitoring parameters. The visualization of groundwater data in our country is still in the developing stage. Generally speaking, the modeling method of groundwater is backward, the visualization function of monitoring data is weak, and there is no visualization function of early warning. Aiming at the above problems, the methods of groundwater data visualization are studied by using various scientific visualization techniques. Firstly, the groundwater data source is analyzed, which is divided into geological data and monitoring data. Secondly, according to the geological data of groundwater, using triangle network, improved triangle network and regular rectangular network method to model the 3D geological layer, the modeling results are analyzed and compared. The layer modeling method which is most suitable for groundwater data is selected. Then according to the characteristics of sparse distribution of geological data, a method of constructing regular grid triangular-column element is proposed, and a three-dimensional geological body model of groundwater is established. Thirdly, according to the monitoring data of groundwater level, the isobaric map based on regular triangle network is constructed, and the three-dimensional isowater level surface is generated in the three-dimensional geological model of groundwater to reach the level information. The goal of dynamic simulation and visualization of 3D geological model is integrated to realize the visualization method of real-time groundwater level monitoring. Finally, in order to prevent over-exploitation of groundwater resources, the image edge detection method is improved, and the local extremum finding algorithm based on the temporal variation of water level is put forward in combination with the variation rule of water level data. By constructing a surface model of water level time series variation, and searching for local extremum, the algorithm determines the region of water level variation anomaly. Then the visualization method of real-time water level monitoring is used to realize early warning and prompt, so as to achieve the purpose of real-time groundwater level early warning visualization. Taking Visual Studio 2010 and OpenGL as development tools, this paper realizes the visualization method of groundwater data, and takes the actual groundwater data of Dingbian County, Yulin City, Shaanxi Province as an example, and verifies that the data visualization method proposed in this paper is feasible, effective and practical. It provides a reliable method for visual monitoring and safety management of groundwater.
【學位授予單位】:西安科技大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:P641.7;TP391.41
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