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Landslide longitudinal shape: a new concept for complementing landslide aspect ratio

文献类型：期刊论文

作者Li, Langping1; Lan, Hengxing1,2; Strom, Alexander2,3; Macciotta, Renato4
刊名LANDSLIDES
出版日期2022-02-15
页码21
关键词Landslide Longitudinal shape Aspect ratio Length-to-width ratio Profile
ISSN号1612-510X
DOI10.1007/s10346-021-01828-w
通讯作者Li, Langping(lilp@lreis.ac.cn) ; Lan, Hengxing(lanhx@lreis.ac.cn)
英文摘要Aspect ratio is an elementary parameter widely adopted to characterize landslide geometry. Nevertheless, it in essence reflects an overall elongation of landslide only, and cannot reflect the variation of width along the central line of movement. This paper proposes the new concept "landslide longitudinal shape" for complementing the landslide aspect ratio, and develops the methodology for interpreting it based on generation and analysis of the landslide profile. Relative width change and relative width fluctuation are defined as parameters quantitatively describing landslide longitudinal shape, and five different types of shape (rectangle, widening, narrowing, spindle, and hourglass) are predefined for qualitatively classifying it. A case study showed that landslide longitudinal shape can provide additional information and therefore is a complement to the aspect ratio. Landslides with larger aspect ratios (more elongated) are more possibly characterized by a narrowing overall varying trend and a stronger fluctuation of width. Landslides with similar longitudinal shapes of headscarp zones were found to have transition-deposition zones with diverse longitudinal shapes, which is caused by diverse topographic confinements and forces governing motion. For an unconfined and laterally confined landslide in the study area, its transition-deposition zone is most likely to have a regular and narrowing longitudinal shape, respectively. Longitudinal shape is not just a geometric parameter, but can somehow help to understand motion constraints of landslides. It must be emphasized that the new longitudinal shape concept is not applicable to landslides that show a complex geometry that prevents a clear definition of a longitudinal profile.
WOS关键词GEOMETRICAL CHARACTERISTICS ; MORPHOMETRIC PROPERTIES ; GEOLOGICAL CONTROLS ; EARTHQUAKE ; SUSCEPTIBILITY ; SLOPE ; INVENTORIES ; MOUNTAINS ; MOBILITY ; JANUARY
资助项目Strategic Priority Research Program of Chinese Academy of Sciences (CAS)[XDA23090301] ; National Natural Science Foundation of China[42177150] ; National Natural Science Foundation of China[42041006] ; National Natural Science Foundation of China[41941019] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0904]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000755439000001
出版者SPRINGER HEIDELBERG
资助机构Strategic Priority Research Program of Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program
源URL[http://ir.igsnrr.ac.cn/handle/311030/170828]  
专题中国科学院地理科学与资源研究所
通讯作者Li, Langping; Lan, Hengxing
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11 A Datun Rd, Beijing 100101, Peoples R China
2.Changan Univ, Sch Geol Engn & Geomat, Xian 710064, Peoples R China
3.Geodynam Res Ctr LLC, Moscow 125008, Russia
4.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB T6G 1H9, Canada
推荐引用方式
GB/T 7714		 Li, Langping,Lan, Hengxing,Strom, Alexander,et al. Landslide longitudinal shape: a new concept for complementing landslide aspect ratio[J]. LANDSLIDES,2022:21.
APA Li, Langping,Lan, Hengxing,Strom, Alexander,&Macciotta, Renato.(2022).Landslide longitudinal shape: a new concept for complementing landslide aspect ratio.LANDSLIDES,21.
MLA Li, Langping,et al."Landslide longitudinal shape: a new concept for complementing landslide aspect ratio".LANDSLIDES (2022):21.

入库方式： OAI收割

来源：地理科学与资源研究所

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