When it is applied to the analysis of groundwater environmental system(GES), we can select the most important one in many variances, so that to attain "the optimum of variance structure", to simplify system, and the same time, don't loss the principal information which has direct and indirect relation to the GES.

Numerical modeling with multiphase flow model of petroleum pollutant transport in subsurface environment;

The circulatory system of underground water in the Karst valley area of the Zhongliang Mountains in Chongqing consists of three distinct layers: The circulatory zone of the upper stratum underground water, the circulatory zone of the middle stratum underground water and the diffusion layer of the deep underground water.

Spatial variability of groundwater environmental quality in Yanbian State;

Modified BP neural network-based groundwater environmental vulnerability evaluation;

Application of catastrophe theory to risk assessment of groundwater environment for river basin;

Impact of rubber dam project on ground water environment;

Analysis on the influence of city rail transit construction on ground water environment:taking Xi′an urban rail transit second line as an example;

Hydrogeological survey, ground water level and quality monitoring are performed in the backland of two stretches of Yangtze Dyke before and when cut-off wall was under construction and after it was fulfilled, but the effects of cut-off wall on ground water environment are not found.

Excavation of tunnel changes not only the stresses and deformation of tunnel surrounding rock,but also disturbs the underground water environment in tunnel surrounding rock.