Vulnerability Assessment To Dongguan Town In Qixian Ground Water Resources Based On GIS

The research of groundwater vulnerability is the basis of groundwater environment protection. In 1968, a French Margat first raised the term "groundwater vulnerability " in his article, and he and Albinet successively made descriptions through pictures of vulnerability degree of groundwater on pollution, so as to arouse the human society attention to the danger of groundwater pollution. In 1993, the American State Committee of Scientific Research gave groundwater vulnerability a definition: it is the tendency and possibility of pollutants reaching a certain position above the highest water-containing level.GIS, which has the functions of the input, store, management, search, disposal, and synthetic analysis of geographical spatial data and information, has been widely used in every field. Since GIS is becoming more and more practical, which has the ability of synthetic analysis as well as spatial module construction, and to change and renew the data base at any time, the evaluation process is facilitated, strong support is given to groundwater vulnerability, and the development of the research on groundwater vulnerability is promoted, thus GIS has been widely applied in...