多孔介質中污染物運移規(guī)律研究及工程應用
[Abstract]:At present, countries all over the world attach great importance to the problem of groundwater pollution. Groundwater pollution in some areas has reached a fairly serious level, which poses a great threat to production and construction, especially to human health. Therefore, it has become an important research topic to study the status quo of groundwater pollution, forecast its development direction, formulate corresponding control measures and purify polluted groundwater. In this paper, a numerical model of unsteady flow is established, and a numerical simulation of groundwater near the spring region of Jinan urban area is carried out. The spatial and temporal distribution of groundwater and the characteristics of pollutant migration in spring region of Jinan urban area are obtained. On this basis, aiming at the impact of pollutant leakage on groundwater environment in a new project, the characteristics of pollutant transport are studied by setting different horizontal and longitudinal dispersion degrees. The results show that the convection plays a major role in the vertical transport of pollutants in the region near the spring group, and the value of longitudinal dispersion has little effect, while the dispersion plays a major role in the lateral transport of pollutants, and the value of transverse dispersion is more important. The research results have important reference significance for groundwater environmental protection and groundwater pollution prevention and control in the vicinity of Quan Group. According to the predicted results of numerical simulation, different monitoring points are set up in the project area, and the model is identified and verified according to the change of pollutant concentration at the monitoring point. The verification results show that the model has high accuracy. The model has a high guiding significance for prediction. The change trend of pollutant transport in groundwater in the next 20 years is predicted by using the established conceptual model. The predicted results show that in the next 20 years, pollutants will continue to migrate to Baotu Spring, and the concentration of pollutants will continue to increase, but when a critical value is reached, it will tend to be balanced, and the critical value is within the allowable range. Pollutants will also cause some pollution to the surrounding groundwater. The diffusion rate of pollutants has a certain relationship with the exploitation speed of the groundwater in the surrounding area. If the exploitation of groundwater increases, the diffusion of pollutants will be accelerated.
【學位授予單位】:山東大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:X523
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