摘要
藏东南峡谷深切、山势险峻,是一个滑坡等地质灾害多发地区。本文通过对该区滑坡时空分布规律的分析,探讨了滑坡与地形地貌、地层岩性、地质构造、降水等因素的关系。藏东南地区滑坡主要发生在每年5—9月的雨季,尤以6月最为集中;砂岩、页岩、泥岩以及活动断裂发育区滑坡发生的频率高,而花岗岩、片麻岩等岩石分布区滑坡不发育;斜坡坡度大于30°的谷地是滑坡主要发育区。
The southeast Tibet terrain with deep valleys and steep mountains is abundant in geological disasters such as landslides. This paper analyzes the landslide development regularity, discusses the relation between landslides and terrain, lithologies, structures, and rainfalls. The landslides occur during the rainy seasons May to September, most in June. The landslides trend to occur in sandstone, shale, mudstone, and active faults areas, but not in the granite and gneiss areas. Slope with over 30 degrees is also favorable for landslides.
出处
《资源与产业》
北大核心
2009年第2期132-139,共8页
Resources & Industries
关键词
滑坡
发育规律
地质因素
藏东南
landslides
development regularity
geological factors
southeast Tibet
