摘要
为分析地形地貌与滑坡敏感性之间的关系,借助地理信息系统(GIS)空间分析技术和滑坡影响因子贡献率的数学方法,研究雅安市雨城区坡度坡向对滑坡的影响程度的大小。通过研究得到了每一区间的坡度和坡向对滑坡的贡献率,定量地分析了坡度、坡向对研究区域的滑坡发育的关系。研究结果表明,坡度20～30°区间的区域为滑坡最敏感的区域,坡向带90～120°区间是滑坡灾害最敏感的区域,但坡向带每一区域的贡献率差别不大。
The sensitivity relation of topography and geomorphology with landslides in Yucheng district,Ya＇an city were analyzed.The contribution rates of slope gradients and slope aspects in each section were calculated by GIS technology and the proposed contribution rate method of landslide influence factor.The relations of slope gradient and slope aspect with landslide development were quantitatively analyzed.It shows that slope gradient among 20°-30° and slope aspect among 90°-120° are the most sensitive section.But the contribution rate of slope aspect in each section has little difference.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2011年第11期3-7,共5页
China Safety Science Journal
基金
河北省自然科学基金资助(E2009000943)
国土资源公益性行业科研专项项目(201011003)
河南省科技攻关计划项目(082102350046)
关键词
区域滑坡灾害
地理信息系统(GIS)
贡献率
地形地貌
敏感性分析
regional landslide disasters
geographic information system（GIS）
contribution rates
topography and geomorphology
sensitivity analysis
