A grid-based physical model to analyze the stability of slope unit

doi:10.1016/j.geomorph.2021.107887

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 > 山地灾害与地表过程重点实验室

	A grid-based physical model to analyze the stability of slope unit
	Zhang, Shaojie 3; Ma, Zhigang 2; Li, Yongjian 2; Hu, Kaiheng 3; Zhang, Qun 2; Li, Li 1
刊名	GEOMORPHOLOGY
	2021-10-15
卷号	391 页码:12
关键词	Landslides Slope units Grid cells Antecedent effective rainfall Failure area ratio
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2021.107887
英文摘要	Grid cells and slope units are commonly used in regional landslide analysis models. In practice, both show significant advantages and disadvantages. Due to the simplicity of using regular grid cells, grid cells are favored in landslide analysis models but cannot reflect the boundary of natural slopes and landforms. Slope unit can reflect characteristics of a natural slope. The algorithm of slope stability analysis needs to iteratively calculate the safety factor of each dangerous slip surface, which is more complicated than the stability analysis method of grid cells. To this end, the failure area ratio (r(A)) of the slope unit, which represents the size of the failure area inside the slope unit under the rainfall infiltration, is employed to establish our landslide analysis model. In this model, larger r(A) can indicate a greater unstable probability of the slope unit, which is used to identify whether a slope unit is stable or not. Taking the rainfall data provided by Chongqing Meteorological Bureau as inputs, the landslide analysis model was tested in Fengjie County, Chongqing. Results show that the spatial distribution of the predicted landslides has a good correspondence with the observed landslides. The rate of false negative and false positive of the proposed model is 12.3% and 24.3%, and the accuracy of the model is 78.3%. (C) 2021 Elsevier B.V. All rights reserved.
资助项目	National Key Research and Develop-ment Program of China[2018YFC1505205] ; Research on Intelligent Monitoring and Early Warning Technology of Debris Flow on Sichuan-Tibet Railway[K2019G006] ; Chongqing Science and Technology Com-mission Project[cstc2018jscx-mszdX0074] ; Chongqing Municipal Bureau of Land, Resources and Housing Administration[KJ-2019054]
WOS关键词	RAINFALL INDUCED LANDSLIDES ; EARLY WARNING SYSTEM ; SHALLOW LANDSLIDES ; DEBRIS-FLOW ; HAZARD ; GIS ; THRESHOLDS ; EARTHQUAKE ; FAILURE ; SCALE
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000696636700002
资助机构	National Key Research and Develop-ment Program of China ; Research on Intelligent Monitoring and Early Warning Technology of Debris Flow on Sichuan-Tibet Railway ; Chongqing Science and Technology Com-mission Project ; Chongqing Municipal Bureau of Land, Resources and Housing Administration
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56238]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Ma, Zhigang; Hu, Kaiheng
作者单位	1.Chongqing Nat Resources Safety Dispatch Ctr, Chongqing 401147, Peoples R China 2.Sichuan Inst Land & Space Ecol Restorat & Geol Ha, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shaojie,Ma, Zhigang,Li, Yongjian,et al. A grid-based physical model to analyze the stability of slope unit[J]. GEOMORPHOLOGY,2021,391:12.
APA	Zhang, Shaojie,Ma, Zhigang,Li, Yongjian,Hu, Kaiheng,Zhang, Qun,&Li, Li.(2021).A grid-based physical model to analyze the stability of slope unit.GEOMORPHOLOGY,391,12.
MLA	Zhang, Shaojie,et al."A grid-based physical model to analyze the stability of slope unit".GEOMORPHOLOGY 391(2021):12.