Research And Development Of The Three-dimensional Hydrogeological Structure Visualization Model In Xi'an

In recent years, three-dimensional geological modeling and visualization is developing rapidly and has become a hot research field of the earth science. Using the power of the three-dimensional geological modeling and visualization software, we can build a three-dimensional hydrogeological structure visualization model. The model can clearly display the spatial structure information of the geology and hydrogeology and achieve visualization. However, the appliance of the three-dimensional geological modeling and visualization in the field of hydrogeology is later and not very extensive, compared with its appliance in the field of geology.This paper is an attempt of the three-dimensional geological modeling and visualization in the field of hydrogeology. In this paper, xi'an is the study area.We analyze the previous geological and hydrogeological research results of the study area, firstly build the three-dimensional hydrogeological structure visualization model in xi'an, using the advanced three-dimensional geological modeling software—Environmental Visualization System(EVS-Pro). The main functions of the model are as follows:(1) The model can omni-directionally and multi-angle display the overall shape of the three-dimensional hydrogeological structure model in xi'an and achieve its three-dimensional visualization.(2) The model can display the three-dimensional structure of the single aquifer (weak permeability) in Xi'an and achieve its three-dimensional visualization.(3) The model can display the north-south profile at any X position (Km network coordinates abscissa) and the east-west profile at any Y position (Km network coordinates ordinate).(4) The model can also generate the three-dimensional visualization fence diagrams by the combination of profiles at many X and Y positions. It can clearly show the internal details of the three-dimensional hydrogeological structure visualization modle in Xi'an.By the three-dimensional hydrogeological structure visualization model in xi'an, we can not only directly analyze Xi'an geological structure with groundwater, but also can analyze the relations between the exploitation of Xi'an groundwater, especially the confined water and the land subsidence caused by the exploitation of groundwater. The model lay an important hydrogeological basis for the accurate assessment, planning and management of the groundwater resources in Xi'an.