舟曲罗家峪“8.8”特大泥石流特征与成因
The Characteristics and Forming Reasons of “8.8” Debris Flow at Luo jiayu Gulley,Zhouqu
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摘要: 舟曲"8.8"特大泥石流是我国有历史记载以来造成损失最大的一次泥石流灾害,如实地记录这次灾害的特点、形成条件及致灾因素,分析其发展趋势并提出风险减缓措施,对指导灾后重建和今后的研究都是十分必要的.以舟曲"8.8"泥石流中的罗家峪为对象,通过泥石流勘查,分析了泥石流形成的地质环境条件,描述了三眼峪泥石流的分区特征和堆积物特征,从泥石流的堆积特征、重度、流速、流量的特征值等方面阐述了本次泥石流的发育特征;从地形地貌、固体物质和极端降雨等方面分析了泥石流的形成原因.Abstract: The debris flow happened on 8th august 2010 in Zhouqu county is a disaster which caused the biggest damage in Chinese recorded history.It is extremely meaningful to faithfully record the features,forming reasons and triggering factors of this debris flow,analysis the developments and propose the risk mitigation measures for the reconstructions guidance and further study of this disaster.This paper takes the debris flow at Luojiayu gulley as an example.Based on detailed exploration,the forming reasons of this debris flow was analyzed from the geological environmental point of view.The zoning and deposition characteristics of this debris flow were described.The development features of the debris flow was analyzed according to the accumulation features,values of unit weights,velocity and discharge.The forming reasons were studied based on the topography,solid material properties,and the extremely rainfall conditions.
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Key words:
- debris flow /
- development features /
- forming reasons /
- Zhouqu /
- Luojiayu gulley
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