Effect of Vegetation Roots on the Threshold of Slope Instability Induced by Rainfall and Runoff

被引:12
作者
Huang, Gang [1 ,2 ]
Zheng, Mingxin [1 ]
Peng, Jing [2 ]
机构
[1] East China Jiaotong Univ, Dept Civil, Architecture Coll, Nanchang, Jiangxi, Peoples R China
[2] Huanggang Normal Univ, Dept Civil & Architecture Engn, Huanggang, Peoples R China
基金
中国国家自然科学基金;
关键词
LANDSLIDE SUSCEPTIBILITY ASSESSMENT; SOIL-EROSION; SHALLOW LANDSLIDES; MODEL; REINFORCEMENT; PLANTATIONS; EARTHQUAKE; SIMULATION; STABILITY; COVER;
D O I
10.1155/2021/6682113
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Although vegetation is increasingly used to mitigate landslide risks, how vegetation roots affect the landslide threshold of slope has rarely been explored, particularly in the case of lateral runoff. In this study, we established a two-dimensional saturated-unsaturated infiltration equation considering the hydraulic effects of vegetation roots. The analytical solution for the shallow unsaturated two-dimensional coupled infiltration of vegetated slope (VS) was obtained by a Fourier transform technique. The numerical method was used to evaluate the stability of VS caused by four root architectures, the rainfall amount, and the rainfall duration. Subsequently, the transformation law in runoff, vegetation evaporation, and landslide threshold was analyzed. The results indicate that the factor of safety (FOS) increases with increasing drying time and decreases with increasing depth; the minimum FOS is at the junction of the root-rootless zone. Runoff and vegetation evaporation are favorable for the shallow stability of VS. The time of the safe area is 35 h for rainfall amount 500 m in the uniformly root clay slope. Moreover, four landslide threshold curves that reflected the root architecture, rainfall amount, and rainfall duration are developed, which are more realistic than those created using one-dimensional instability modeling.
引用
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页数:19
相关论文
共 63 条
[1]  
[Anonymous], 2015, 16 ECSMGE GEOTECHNIC, DOI DOI 10.1680/ECSMGE.60678
[2]   Modeling the hydrological and mechanical effect of roots on shallow landslides [J].
Arnone, E. ;
Caracciolo, D. ;
Noto, L. V. ;
Preti, F. ;
Bras, R. L. .
WATER RESOURCES RESEARCH, 2016, 52 (11) :8590-8612
[3]   Soil erosion in Mediterranean chestnut tree plantations at risk due to climate change and land abandonment [J].
Barrena-Gonzalez, Jesus ;
Lozano-Parra, Javier ;
Alfonso-Torreno, Alberto ;
Lozano-Fondon, Carlos ;
Abdennour, Mohamed Amine ;
Cerda, Artemi ;
Pulido-Fernandez, Manuel .
CENTRAL EUROPEAN FORESTRY JOURNAL, 2020, 66 (02) :85-96
[4]   Quantifying the contribution of grapevine roots to soil mechanical reinforcement in an area susceptible to shallow landslides [J].
Bordoni, M. ;
Meisina, C. ;
Vercesi, A. ;
Bischetti, G. B. ;
Chiaradia, E. A. ;
Vergani, C. ;
Chersich, S. ;
Valentino, R. ;
Bittelli, M. ;
Comolli, R. ;
Persichillo, M. G. ;
Cislaghi, A. .
SOIL & TILLAGE RESEARCH, 2016, 163 :195-206
[5]   A unique relationship for χ for the determination of the shear strength of unsaturated soils -: N.!Khalili and M. H.!Khabbaz, (1998).: Geotechnique 48, No. 5, 681-687 -: Discussion [J].
Cabarkapa, Z ;
Cuccovillo, T ;
Gunn, M .
GEOTECHNIQUE, 2002, 52 (01) :76-77
[6]   THE RAINFALL INTENSITY - DURATION CONTROL OF SHALLOW LANDSLIDES AND DEBRIS FLOWS [J].
CAINE, N .
GEOGRAFISKA ANNALER SERIES A-PHYSICAL GEOGRAPHY, 1980, 62 (1-2) :23-27
[7]   Wetting-induced collapse behaviour of a natural and vegetated coarse pyroclastic soil [J].
Capobianco, Vittoria ;
Cascini, Leonardo ;
Cuomo, Sabatino ;
Foresta, Vito .
4TH EUROPEAN CONFERENCE ON UNSATURATED SOILS (E-UNSAT 2020), 2020, 195
[8]   Wetting-drying response of an unsaturated pyroclastic soil vegetated with long-root grass [J].
Capobianco, Vittoria ;
Cascini, Leonardo ;
Cuomo, Sabatino ;
Foresta, Vito .
ENVIRONMENTAL GEOTECHNICS, 2020, 10 (05) :332-350
[9]   Application of the MoniFLaIR early warning system for rainfall-induced landslides in Piedmont region (Italy) [J].
Capparelli, Giovanna ;
Tiranti, Davide .
LANDSLIDES, 2010, 7 (04) :401-410
[10]   RAINFALL AND WATER YIELD IN MACIZO DEL CAROIG, EASTERN IBERIAN PENINSULA. EVENT RUNOFF AT PLOT SCALE DURING A RARE FLASH FLOOD AT THE BARRANCO DE BENACANCIL [J].
Cerda, Artemi ;
Novara, Agata ;
Dlapa, Pavel ;
Lopez-Vicente, Manuel ;
Ubeda, Xavier ;
Popovic, Zorica ;
Mekonnen, Mulatie ;
Terol, Enric ;
Janizadeh, Saeid ;
Mbarki, Sonia ;
Saldanha-Vogelmann, Eduardo ;
Hazrati, Sajjad ;
Sannigrahi, Srikanta ;
Parhizkar, Misagh ;
Gimenez-Morera, Antonio .
CUADERNOS DE INVESTIGACION GEOGRAFICA, 2021, 47 (01) :95-119