水打沟岸坡堆积体滑坡转化为泥石流的前期降雨条件分析  

Prophase Rainfall Condition Analysis of Talus Landslide Conversion into Debris Flow in Shuida Gully

作　　者：马治鸾[1] 陈晔[2] 

机构地区：[1]成都理工大学旅游与城乡规划学院,四川成都610059 [2]成都理工大学地球科学学院,四川成都610059

出　　处：《水电能源科学》2012年第7期105-108,共4页Water Resources and Power

摘　　要：2010年8.13水打沟滑坡型泥石流危害严重,为此有必要分析研究滑坡起动条件及滑坡转化为泥石流的前期降雨条件,以便为预测滑坡型泥石流奠定基础。针对水打沟处地形地貌条件、地层岩性、地质构造条件和2010年8月13日的暴雨条件,从静力学和动力学角度分析了滑坡堆积体在强降雨条件下的起动条件及斜坡松散堆积体其失稳条件时的地表径流水深,得到了水打沟8.13泥石流形成前滑坡转化为泥石流时的前期降雨量、降雨强度及泥石流爆发时间等,可为经历过2008年汶川5.12大地震后的同类冲沟滑坡及泥石流预测、预防提供参考。The landslide debris flow is seriously harm in Shuida gully on August 13, 2010. So it is necessary to study the starting conditions of landslide and the prophase rainfall condition of slope landslide conversion into debris flow, which can lay the foundation for forecasting the landslide-type debris flow. Aiming at the terrain conditions, the formation li- thology, the geological structure conditions of Shuida gully and the rainstorm conditions on August 13, Z010, it analyzes the loose landslide starting conditions in the strong rainfall conditions and the depth of surface runoff when the accumula- tion body is instability from the view of static and dynamic. And then the prophase rainfall, rainfall intensity and starting time of Shuida gully debris flows are obtained before the debris flow formed. Thus, it can provide reference for prediction and prevention similar gully after the 5.12 Wenchuan earthquake in 2008.

关 键 词：松散堆积体 滑坡 泥石流 降雨条件 水打沟 

分 类 号：P642.23[天文地球—工程地质学]