基于GIS的长白山地区山体滑坡易发程度分析

将地理信息系统（GIS）和遥感技术（Rs）相结合，利用地质图、土壤图、土地利用图、坡度图、坡向图对长白山地区进行了山体滑坡易发程度分析．首先基于遥感技术对长白山地区的卫星图像进行了分类，并绘制了土地利用图，然后用长白山地区的数字高程模型分别获取了坡度和坡向信息；其次利用AHP技术计算了5种山体滑坡影响因子的重要度，结果显示坡度重要度最高，坡向重要度最低；最后根据山体滑坡影响因子的重要度，使用GIS的栅格数据叠置功能绘制了山体滑坡易发区划图，图中显示最危险区域（危险度≥O．9）主要分布在集安市、临江市和和龙市周围的山区地带中靠近中朝边界的地区．

GIS-based landslide susceptibility analysis in the Changbai Mountain area

We analyzed the landslide susceptibility in the Changbai Mountain area using GIS （geographic information system） and RS （remote sensing） with geology, soil, land use, aspect and slope map. Firstly, we classified satellite images in the Changbai Mountain area and draw the land use map. The slope and aspect map were obtained from the DEM （digital elevation model） of the study area. Secondly, the weight values of five factors which affect the landslide occurrence were calculated by the AHP （analytic hierarchy process） technolo- gy. The result of AHP calculation shows that the slope was the highest, aspect was the lowest factor. Finally, we get the landslide susceptibility map using GIS overlay method based on weight values of each factor and it shows that very dangerous area （0.9 or higher） were mainly distributed in the mountainous areas around city of Jian, city of Linjiang, and city of Helong near the China-north Korea border.