摘要
低频泥石流是我国分布最广、数量最大、危害性极大的一类泥石流,因其特有的隐蔽性,它所造成的人员伤亡和财产损失均居各类泥石流之首。通过对新疆某水电站坝后一低频泥石流沟堆积物的研究,探讨了该类泥石流的发育特征和研究方法。由于低频泥石流形成周期较长,一般几十年甚至上百年,从而后期的流水、暴雨有足够的时间通过侵蚀、置换作用,在各期泥石流堆积物的顶部形成一个显著的"粗化层",这为判定泥石流活动的期次、规模、发展趋势提供了重要的依据。
Low-frequency debris flow is the most widely distributed and dangerous in China, which number is the largest, because of its unique hidden Characteristics, the casualty and property losses that it caused is larger than any other debris flow. This article discussed the development features and research methods of such debris flow, through the study of a low frequency debris flow deposition in the behind of a hydropower station dam in Xinjiang. Because the formation of the low frequency debris flow is a long cycle, in general for decades or even centuries, the Late water and heavy rains have enough time through the corrosion and replacement role to form an obvious ＂thick layer＂ in the top of each period debris flow deposition, which provides an important evidence for determining the periods, size and trends of the debris flow.
出处
《中国地质灾害与防治学报》
CSCD
2009年第4期41-44,共4页
The Chinese Journal of Geological Hazard and Control
关键词
低频泥石流
堆积物
“粗化层”
low-frequency debris flow
deposition
＂thick layer＂
