摘要
在长江上游地区100km2的范围内，共普查发现滑坡1736处，总体积133．97亿m3，滑坡平均密度1．37个／km2．平均面变形率1333．03万m3／1000km2。其中尤以水土保持重点治理区的三大片即陇南陕南片、金沙江下游片及长江三峡库区片分布最为密集，具有规模大、活动性高、危害严重的特点．且近年来活动的频率和强度有进一步加剧的趋势。在控制滑坡分布的主要因素中以地形地貌、地质构造、地层岩性、气候条件及人类活动最为重要。
In an area of 100km2 in the upper reaches of Yangtse River (Changjiang), there are 1736 spots of landslide through surveying, with a total volume of 13. 397 billion m3, mean density of landslide of 1. 37 spots/km2,and mean areal deformability of 13330.3m3/km2. Especially, the most densley distributed areas number to three in the major water-soil conservation regions, i. e. southern Gansu-southern Shananxi, lower reaches of Jinsha River and Three-Gorge Reservoir areas, which are characterized by large scale, high activity and serious harmfulness. and in addition, with a tendency of further enhancement of the ftequency and intensity of activity in recent years. of the major controlling factors over landslides. the most important ones are landform, geologic structute, lithologic character, climate and human activity.
出处
《水文地质工程地质》
CAS
CSCD
1997年第1期19-22,32,共5页
Hydrogeology & Engineering Geology
关键词
长江
上游地区
滑坡
分布特征
控制因素
upper reaches of Yangtze River (Changjiang), landslide, distribution characteristics, controlling factor
