Landslide and Basin Self-organized Criticality in the Lushan Hot Spring Area

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2012 > Vol9 No.4

	Landslide and Basin Self-organized Criticality in the Lushan Hot Spring Area
	Chien-Yuan CHEN
刊名	Journal of Mountain Science
	2012-08
卷号	9 期号:4 页码:463-471
关键词	Landslide Debris flow Power law Self-organized criticality
通讯作者	Chien-Yuan CHEN
英文摘要	Defining a basin under a critical state (or a self-organized criticality) that has the potential to initiate landslides, debris flows, and subsequent sediment disasters, is a key issue for disaster prevention. The Lushan Hot Spring area in Nantou County, Taiwan, suffered serious sediment disasters after typhoons Sinlaku and Jangmi in 2008, and following Typhoon Morakot in 2009. The basin’s internal slope instability after the typhoons brought rain was examined using the landslide frequency-area distribution. The critical state indices attributed to landslide frequency-area distribution are discussed and the marginally unstable characteristics of the study area indicated. The landslides were interpreted from Spot 5 images before and after disastrous events. The results of the analysis show that the power-law landslide frequency-area curves in the basin for different rainfall-induced events tend to coincide with a single line. The temporal trend of the rainfall-induced landslide frequency-area distribution shows 1/f noise and scale invariance. A trend exists for landslide frequency-area distribution in log-log space for larger landslides controlled by the historical maximum accumulated rainfall brought by typhoons. The unstable state of the basin, including landslides, breached dams, and debris flows, are parts of the basin’s self-organizing processes. The critical state of landslide frequency-area distribution could be estimated by a critical exponent of 1.0. The distribution could be used for future estimation of the potential landslide magnitude for disaster mitigation and to identify the current state of a basin for management.
收录类别	SCI
语种	英语
公开日期	2013-04-17
内容类型	期刊论文
源URL	[http://192.168.143.20:8080/handle/131551/5120]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2012_Vol9 No.4
推荐引用方式 GB/T 7714	Chien-Yuan CHEN. Landslide and Basin Self-organized Criticality in the Lushan Hot Spring Area[J]. Journal of Mountain Science,2012,9(4):463-471.
APA	Chien-Yuan CHEN.(2012).Landslide and Basin Self-organized Criticality in the Lushan Hot Spring Area.Journal of Mountain Science,9(4),463-471.
MLA	Chien-Yuan CHEN."Landslide and Basin Self-organized Criticality in the Lushan Hot Spring Area".Journal of Mountain Science 9.4(2012):463-471.