基于GIS的三峡库区滑坡坡形研究

Research on slope shape of landslide based on GIS technique

借助GIS技术及统计分析方法,对三峡库区云阳—巫山段的205个滑坡点的坡形进行了定量化研究,得到了研究区内坡形因素对滑坡发育的影响规律,为进一步对研究区进行滑坡危险性评价和分区奠定了基础。在提取坡形时用了两种不同的方法,第一种方法是借助GIS软件用计算机自动生成的坡形,第二种方法是借助GIS软件和3Dmapper软件半自动生成的,经实践检验和理论证明发现,第二种提取坡形的方法要优于前者。

This research project concentrates on analyzing slope shape of landslides. The data for Yunyang-Wushan segment in the Three Gorges Reservoir area is analyzed with GIS technology and statistical methodologies.The laws of slope shape factors′influence on the development of landslide in study area are obtained and they lay a foundation for further assessment and zoning of landslide risk in study area. In this paper two different methods are applied in obtaining slope shape, the first one is automatic acquisition by computer with GIS technology , the second one is semiautomatic acquisition with GIS technology and 3Dmapper software. Based on theoretical and practical varification,it is found that the second method was better than the first one.