IMHE OpenIR  > 山地灾害与地表过程重点实验室
Comparison of single- and dual-permeability models in simulating the unsaturated hydro-mechanical behavior in a rainfall-triggered landslide
Shao, Wei1; Yang, Zongji2; Ni, Junjun3; Su, Ye4; Nie, Wen5; Ma, Xieyao1
Corresponding AuthorYang, Zongji(yzj@imde.ac.cn)
2018
Source PublicationLANDSLIDES
ISSN1612-510X
EISSN1612-5118
Volume15Issue:12Pages:2449-2464
SubtypeArticle
AbstractLandslide-prone slopes in earthquake-affected areas commonly feature heterogeneity and high permeability due to the presence of cracks and fissures that were caused by ground shaking. Landslide reactivation in heterogeneous slope may be affected by preferential flow that was commonly occurred under heavy rainfall. Current hydro-mechanical models that are based on a single-permeability model consider soil as a homogeneous continuum, which, however, cannot explicitly represent the hydraulic properties of heterogeneous soil. The present study adopted a dual-permeability model, using two Darcy-Richards equations to simulate the infiltration processes in both matrix and preferential flow domains. The hydrological results were integrated with an infinite slope stability approach, attempting to investigate the hydro-mechanical behavior. A coarse-textured unstable slope in an earthquake-affected area was chosen for conducting artificial rainfall experiment, and in the experiment slope, failure was triggered several times under heavy rainfall. The simulated hydro-mechanical results of both single- and dual-permeability model were compared with the measurements, including soil moisture content, pore water pressure, and slope stability conditions. Under high-intensity rainfall, the measured soil moisture and pore water pressure at 1-m depth showed faster hydrological response than its simulations, which can be regarded as a typical evidence of preferential flow. We found the dual-permeability model substantially improved the quantification of hydro-mechanical processes. Such improvement could assist in obtaining more reliable landslide-triggering predication. In the light of the implementation of a dual-permeability model for slope stability analysis, a more flexible and robust early warning system for shallow landslides hazard in coarse-textured slopes could be provided.
KeywordRainfall-triggered landslides Soil moisture dynamics Dual-permeability model Preferential flow Slope stability
DOI10.1007/s10346-018-1059-0
Indexed BySCI
WOS KeywordSLOPE STABILITY ANALYSIS ; PHYSICALLY-BASED MODEL ; SHALLOW LANDSLIDES ; PREFERENTIAL FLOW ; HYDRAULIC CONDUCTIVITY ; DEBRIS FLOWS ; SOIL ; INFILTRATION ; EVAPORATION ; PRESSURE
Language英语
Quartile2区
Funding ProjectNational Natural Science Foundation of China[41771021] ; National Natural Science Foundation of China[41471012] ; Hundred Young Talents Program of IMHE[SDSQB-2016-01] ; Science and Technology Service Network Initiative of Chinese Academy of Science[KFJ-EW-STS-094] ; Science and Technology Service Network Initiative of Chinese Academy of Science[KFJ-STS-ZDTP-015] ; China Postdoctoral Science Foundation[2017M621783] ; China Postdoctoral Science Foundation[2018T110527] ; International Postdoctoral Exchange Fellowship Program by China Postdoctoral Council ; Startup Foundation for Introducing Talent of NUIST[2017r045]
TOP
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000451343700011
Funding OrganizationNational Natural Science Foundation of China ; Hundred Young Talents Program of IMHE ; Science and Technology Service Network Initiative of Chinese Academy of Science ; China Postdoctoral Science Foundation ; International Postdoctoral Exchange Fellowship Program by China Postdoctoral Council ; Startup Foundation for Introducing Talent of NUIST
PublisherSPRINGER HEIDELBERG
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23997
Collection山地灾害与地表过程重点实验室
Corresponding AuthorYang, Zongji
Affiliation1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Joint Int Res Lab Climate & Environm Change, Key Lab Meteorol Disaster,Minist Educ,Sch Hydrol, Nanjing 210044, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Sichuan, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
4.Charles Univ Prague, Dept Phys Geog & Geoecol, Fac Sci, Prague 12843, Czech Republic
5.Chinese Acad Sci, Haixi Inst, Quanzhou Inst Equipment Mfg, Quanzhou 362200, Fujian, Peoples R China
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Shao, Wei,Yang, Zongji,Ni, Junjun,et al. Comparison of single- and dual-permeability models in simulating the unsaturated hydro-mechanical behavior in a rainfall-triggered landslide[J]. LANDSLIDES,2018,15(12):2449-2464.
APA Shao, Wei,Yang, Zongji,Ni, Junjun,Su, Ye,Nie, Wen,&Ma, Xieyao.(2018).Comparison of single- and dual-permeability models in simulating the unsaturated hydro-mechanical behavior in a rainfall-triggered landslide.LANDSLIDES,15(12),2449-2464.
MLA Shao, Wei,et al."Comparison of single- and dual-permeability models in simulating the unsaturated hydro-mechanical behavior in a rainfall-triggered landslide".LANDSLIDES 15.12(2018):2449-2464.
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