NDLI: Assessment and mapping of slope stability based on slope units: A case study in Yan’an, China

Content Provider	Springer Nature Link
Author	ZHUANG, JIANQI PENG, JIANBING XU, YONGLONG XU, QIANG ZHU, XINGHUA LI, WEI
Copyright Year	2016
Abstract	Precipitation frequently triggers shallow landslides in the Loess Plateau of Shaanxi, China, resulting in loss of life, damage to gas and oil routes, and destruction of transport infrastructure and farmland. To assess the possibility of shallow landslides at different precipitation levels, a method to draw slope units and steepest slope profiles based on ARCtools and a new method for calculating slope stability are proposed. The methods were implemented in a case study conducted in Yan’an, north-west China. High resolution DEM (Digital Elevation Model) images, soil parameters from in-situ laboratory measurements and maximum depths of precipitation infiltration were used as input parameters in the method. Next, DEM and reverse DEM were employed to map 2146 slope units in the study area, based on which the steepest profiles of the slope units were constructed. Combining analysis of the water content of loess, strength of the sliding surface, its response to precipitation and the infinite slope stability equation, a new equation to calculate infinite slope stability is proposed to assess shallow landslide stability. The slope unit stability was calculated using the equation at 10-, 20-, 50- and 100-year return periods of antecedent effective precipitation. The number of slope units experiencing failure increased in response to increasing effective antecedent rainfall. These results were validated based on the occurrence of landslides in recent decades. Finally, the applicability and limitations of the model are discussed.
Starting Page	1439
Ending Page	1450
Page Count	12
File Format	PDF
ISSN	02534126
Journal	Journal of Earth System Science
Volume Number	125
Issue Number	7
e-ISSN	0973774X
Language	English
Publisher	Springer India
Publisher Date	2016-09-20
Publisher Institution	Indian Academy of Sciences
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Shallow landslide infinite slope stability equation return period precipitation assessment slope unit. Earth Sciences Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics)
Content Type	Text
Resource Type	Article
Subject	1900/1901

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