THE SUITABILITY EVALUATION OF LAND FOR CONSTRUCTION OF XIXIAN AREA BASED ON MAPGIS TECHNIQUES

With the total area of 882km2, Xixian Area is the key construction projects for Xixian integration in Shaanxi province. Although the Xixian area has obvious advantages of location and economy in west of China, it also is subjected to some risks of geological problems due to complex topography and geological structure. Therefore, it is significant to carry out urban geological research in the study area. As a case study, the suitability evaluation of land for construction of Xixian Area was studied based on the methods of analytic hierarchy process(AHP) and MapGIS.The results show that suitable area for living and public facilities is mainly compose of the most suitable and suitable, accounts for 72.58% of the area, and the unsuitable area takes up 22.30%.The most suitable and suitable areas are mainly distributed on the terrace and loess tableland. While the unsuitable areas are mainly distributed on the flood plain and high flood plain, the contact zones between the Jinghe River and loess tableland. Because of the existing geological problems of active faults, landslide, sand liquefaction in these areas, and it is consistent with the practical survey results.