Characteristic of Ancient Debris Flows in Jiangjia Ravine
详细信息
- 责任者：Lei Fahong (Key Laboratory of Mountain Hazards and Earth Surface Processes ; Chinese Academy of Sciences ; Chengdu 610041 ; China) ; Hu Kaiheng
- 刊名：Journal of Mountain Research
- 出版年：2013
- 卷期：31(2)
- 关键词：泥石流 ; debris flows ; 云南 ; Yunnan Province
- 页码：p.218-225
- 图表：illus., 3 tables, 25 refs.
- 分类号：1702
- issnNo：ISSN1008-2786
- isbnNo：CN51-1516/P
摘要
Jiangjia ravine lies in the uplift block of eastern of Xiaojiang giant fault,with intensity tectonic activity and frequently earthquake.Since the Quaternary period,Jiangjia generated several stepped terrace under the internal and external geological process.Based on field survey of the sedimentary structures of residual terrace and the record of debris flow activities in newly formed free face and the characteristics of ancient debris flows’ sediment,the types of debris flows can be confirmed.In addition,the density of ancient debris flows in every period can be calculated by using the gravel and fine particle content of ancient debris flows’ samples in different spots.By this study,the features of debris flows in different stages can be found since the Quaternary periods,and the causes was discussed,which were related to the types of ancient debris flows and sediment’s characters.