长江科学院院报Issue(3)：38-41,4.DOI:10.11988/ckyyb.20150398
金沙江苏洼龙-奔子栏河段滑坡灾害发育分布规律
Occurrence and Distribution Characteristics of Landslides at Suwalong-Benzilan along Jinsha River
摘要
Abstract
Jinsha River, upper reach of Changjiang River, is located in the transition zone of the southeast Qinghai⁃Tibet Plateau, Yunnan⁃Guizhou Plateau and Sichuan Basin. In this area, geological environment is variable with in⁃tense neotectonics movement, fragile ecosystem and frequent landslides. In order to study the occurrence and distri⁃bution characteristics and its influencing factors, we take Suwalong⁃Benzilan reach of the Jinsha River as a case study. Through field geological investigations and existing data, we analyze 32 landslides in the reach. The research results are shown as follows: 1) the spatial distribution of landslide is uneven, mainly in four regions, namely Wangdalong, Maoding, and Simuda in the mainstream of Jinsha River, and Guxue township in the branch of Jinsha River;2) landslides are mainly huge and large⁃scale types whose attitudes are in agreement with deep bedrock, but few landslides exist in quaternary deposits;3) landslides at Suwalong⁃Benzilan reach of the Jinsha River formed in earlier geological ages, and elevation of shear outlet of the landslides is higher than that of water level of the river due to intensive neotectonic movement and rapid river incision rate;4) landslide is relevant to geological environ⁃ment conditions such as landform, lithologic character, geologic structure and river bank structure, in particular, landslide disasters easily occur in conditions of mountain bodies with 30° to 35° slope gradient, greenschist and ophiolite rock mass, fault areas within 1 kilometer and normal river bank slopes.关键词
苏洼龙-奔子栏河段/滑坡灾害/发育规律/影响因素/金沙江Key words
Suwalong-Benzilan reach/landslide hazard/occurrence characteristics/influencing factors/Jinsha River分类
天文与地球科学引用本文复制引用
范雷,张琪..金沙江苏洼龙-奔子栏河段滑坡灾害发育分布规律[J].长江科学院院报,2016,(3):38-41,4.基金项目
国家重点基础研究发展计划（973计划）项目（2011CB710603）；水利部公益性行业科研专项经费项目 （）
