Three (nearly) complete inventories of landslides triggered by the May 12, 2008 Wenchuan Mw 7.9 earthquake of China and their spatial distribution statistical analysis

doi:10.1007/s10346-013-0404-6

	Three (nearly) complete inventories of landslides triggered by the May 12, 2008 Wenchuan Mw 7.9 earthquake of China and their spatial distribution statistical analysis
	Xu, Chong 1,2; Xu, Xiwei 1,2; Yao, Xin 3; Dai, Fuchu 4
刊名	LANDSLIDES
	2014-06-01
卷号	11 期号:3 页码:441-461
关键词	The 2008 Wenchuan earthquake Landslides Inventory Statistical analysis Spatial distribution Landslide area percentage Landslide number density
ISSN号	1612-510X
DOI	10.1007/s10346-013-0404-6
文献子类	Article
英文摘要	The May 12, 2008 Wenchuan earthquake of China (Mw 7.9 or Ms 8.0) triggered hundreds of thousands of landslides. Mapping such a large number of landslides is a major task, considering the large size of the affected area and the availability of pre- and post-earthquake remote sensing images. This paper compares three (nearly) complete landslide inventories that were compiled from visual image interpretation. The three inventories differ in the manner in which the landslides are represented, either as polygons, centroid points, or top points. Landslides in the three inventories use one-to-one correspondence. Each of the three inventories includes a large proportion of the 197,481 landslides triggered by the earthquake. These landslides were delineated as individual solid polygons and points using visual interpretation of high-resolution aerial photographs and satellite images acquired following the earthquake and verified by selected field checking throughout a broad area of approximately 110,000 km(2). These landslides cover a total area of approximately 1,160 km(2). Based on the inventories of landslide polygons and landslide centroid points, two types of density maps were constructed. Correlations of landslide occurrence with seismic, geologic, and topographic parameters were analyzed using the three landslide inventories. Statistical analysis of their spatial distribution was performed using both the landslide area percentage (LAP), defined as the percentage of the area affected by the landslides and the landslide number density (LND), defined as the number of landslides per square kilometer. There are two types of LNDs: the LND-centroid (based on the centroid point of the landslide) and the LND-top (based on the top point of the landslide). We used the three indexes to determine how the occurrence of the landslides correlates with elevation, slope angle, slope aspect, slope position, slope curvature, lithology, distance from the epicenter, seismic intensity, distance from the Yingxiu-Beichuan surface fault rupture, peak ground acceleration (PGA), and coseismic surface displacements (including horizontal, vertical, and total displacements). Both the LAP and the two types of LND values were observed to have continuous positive or negative correlations with the slope angle, slope curvature, distance from the epicenter and from the Yingxiu-Beichuan surface fault rupture, seismic intensity, and coseismic surface displacement. In addition, the highest values of the LAP and LND values appear at ranges from 1,200 to 3,000 m in elevation. Moreover, the landslides have preferred orientations, dominated by the eastern, southeastern, and southern directions. In addition, the sandstone, siltstone (Z), and granitic rocks experienced more concentrated landslides. No obvious correlations were observed between the LAP and LND values and slope position. Finally, we studied the orders of eight earthquake-triggered landslide impact factor effect on landslide occurrence.
WOS关键词	KASHMIR EARTHQUAKE ; PREFECTURE EARTHQUAKE ; NIIGATA PREFECTURE ; 1994 NORTHRIDGE ; LONGMEN SHAN ; LOMA-PRIETA ; MID-NIIGATA ; SUSCEPTIBILITY ; GIS ; JAPAN
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000337061000009
资助机构	National Science Foundation of China(41202235) ; National Science Foundation of China(41202235) ; National Science Foundation of China(41202235) ; National Science Foundation of China(41202235) ; National Science Foundation of China(41202235) ; National Science Foundation of China(41202235) ; National Science Foundation of China(41202235) ; National Science Foundation of China(41202235)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84862]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu, Chong
作者单位	1.China Earthquake Adm, Key Lab Act Tecton & Volcano, Beijing 100029, Peoples R China 2.China Earthquake Adm, Inst Geol, Beijing 100029, Peoples R China 3.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Xu, Chong,Xu, Xiwei,Yao, Xin,et al. Three (nearly) complete inventories of landslides triggered by the May 12, 2008 Wenchuan Mw 7.9 earthquake of China and their spatial distribution statistical analysis[J]. LANDSLIDES,2014,11(3):441-461.
APA	Xu, Chong,Xu, Xiwei,Yao, Xin,&Dai, Fuchu.(2014).Three (nearly) complete inventories of landslides triggered by the May 12, 2008 Wenchuan Mw 7.9 earthquake of China and their spatial distribution statistical analysis.LANDSLIDES,11(3),441-461.
MLA	Xu, Chong,et al."Three (nearly) complete inventories of landslides triggered by the May 12, 2008 Wenchuan Mw 7.9 earthquake of China and their spatial distribution statistical analysis".LANDSLIDES 11.3(2014):441-461.