PRELIMINARY DESIGN OF GIS FOR ENVIRONMENTAL GEOLOGY SURVEY EVALUATION IN CHANGJIANG DELTA

The Changjiang delta is an area with dense population and high developing economy. The geological structure is very complicated and environmental geological condition is vulnerable. The extensive lowering and sinking of regionql groundwater table, the ground subsidence and the ground cracks have begun to form because of over pumping of groundwater for a long time. So the sustainable development of economy have been threatened in this area. The significance and goal of GIS management system for environmental geological survey evaluation in Changjiang delta and its development model and approach to its implementation are briefly discussed, and the functions of the system are simply introduced in this paper. A feasible thinking way for development of the GIS system in the Changjiang delta is suggested.