Abstract
In the hilly terrain of the Indian Himalayas, prolonged severe rainfall and subsequent rise of the water table during the Indian monsoon season are the most prevalent prerequisites for the development of deep-seated landslides. The Kotropi landslide in the mountainous region of Himachal Pradesh represents such a suitable site; its location in the North-West (NW) Himalayas and varying depth of groundwater table (GWT) throughout the year along with several other geological factors resulted in the third reactivation of the slide on August 13th of 2017. To properly quantify and demonstrate the effect of GWT fluctuation on slope instability, this research proposes a comprehensive approach. It integrates the 3D model–building process of the entire slide with the simulation process of that model using FLAC 3D software. To determine the geometry of the slide and the depth of the GWT, a total station tacheometric survey and an electrical resistivity tomography (ERT) study were conducted respectively. When the model was simulated at different GWT depths of 15 m, 10 m, 5 m, and surface, the factor of safety (FoS) dropped from 1.21 to 0.86, indicating slope instability as GWT rises. The findings highlight the importance of groundwater fluctuation modeling in slope instability studies of deep-seated landslides. The simulated models show impending failure in the right flank, which was validated during a recent field visit in April 2022. This study provides useful insights for examining the failure mechanism of deep-seated landslides in the Himalayan terrain.
Data availability
All data are freely available under request to the first author.
References
Afshar A, Abedi M, Norouzi GH, Riahi MA (2015) Geophysical investigation of underground water content zones using electrical resistivity tomography and ground-penetrating radar: a case study in Hesarak-Karaj. Iran Eng Geol 196:183–193. https://doi.org/10.1016/j.enggeo.2015.07.022
Aleotti P, Chowdhury R (1999) Landslide hazard assessment: summary review and new perspectives. Bull Eng Geol Environ 58:21–44. https://doi.org/10.1007/s100640050066
Anand AK, Pradhan SP (2019) Assessment of active tectonics from geomorphic indices and morphometric parameters in part of Ganga basin. J Mt Sci 16:1943–1961. https://doi.org/10.1007/s11629-018-5172-2
Bahsan E, Fakhriyyanti R (2018) Comparison of 2D and 3D stability analyses for natural slope. Int J Eng Technol 7:662–667. https://doi.org/10.14419/ijet.v7i4.35.23085
Bennett GL, Roering JJ, Mackey BH, Handwerger AL, Schmidt DA, Guillod BP (2016) Historic drought puts the brakes on earthflows in Northern California. Geophys Res Lett 43:5725–5731. https://doi.org/10.1002/2016GL068378
Beyabanaki SAR (2020) A comparison between using finite difference and limit equilibrium methods for landslide analysis of slopes containing a weak layer. Am J Eng Res 9:68–79
Bovolenta R, Bianchi D (2020) Geotechnical analysis and 3d FEM modeling of Ville San Pietro (Italy). Geosci 10:1–23. https://doi.org/10.3390/geosciences10110473
Cai F, Ugai K (2004) Numerical analysis of rainfall effects on slope stability. Int J Geomech 4:69–78. https://doi.org/10.1061/(ASCE)1532-3641(2004)4:2(69)
Carrière SD, Chalikakis K, Sénéchal G, Danquigny C, Emblanch C (2013) Combining electrical resistivity tomography and ground penetrating radar to study geological structuring of karst unsaturated zone. J Appl Geophys 94:31–41. https://doi.org/10.1016/j.jappgeo.2013.03.014
CGWB (2020) Ground Water Year Book 2019–20. 1–99
Chambers JE, Wilkinson PB, Kuras O, Ford JR, Gunn DA, Meldrum PI, Pennington CVL, Weller AL, Hobbs PRN, Ogilvy RD (2011) Three-dimensional geophysical anatomy of an active landslide in Lias Group mudrocks, Cleveland Basin, UK. Geomorphology 125:472–484. https://doi.org/10.1016/j.geomorph.2010.09.017
ClimChAlp (2008) Slope monitoring methods a state of the art report. Imprint 179
Drahor MG, Göktürkler G, Berge MA, Kurtulmuş TÖ (2006) Application of electrical resistivity tomography technique for investigation of landslides: a case from Turkey. Environ Geol 50:147–155. https://doi.org/10.1007/s00254-006-0194-4
Falae PO, Kanungo DP, Chauhan PKS, Dash RK (2019) Electrical resistivity tomography (ERT) based subsurface characterisation of Pakhi Landslide, Garhwal Himalayas, India. Environ Earth Sci 78:1–18. https://doi.org/10.1007/s12665-019-8430-x
Fredlund DG, Rahardjo H (1993) Soil mechanics for unsaturated soils. Wiley, New York
Friedel S, Thielen A, Springman SM (2006) Investigation of a slope endangered by rainfall-induced landslides using 3D resistivity tomography and geotechnical testing. J Appl Geophys 60:100–114. https://doi.org/10.1016/j.jappgeo.2006.01.001
Froude MJ, Petley DN (2018) Global fatal landslide occurrence from 2004 to 2016. Nat Hazards Earth Syst Sci 18:2161–2181. https://doi.org/10.5194/nhess-18-2161-2018
Gao Q, Shang Y, Hasan M, Jin W, Yang P (2018) Evaluation of a weathered rock aquifer using ERT method in South Guangdong, China. Water (switzerland) 10:1–22. https://doi.org/10.3390/w10030293
Germer K, Braun J (2011) Effects of saturation on slope stability: laboratory experiments utilizing external load. Vadose Zo J 10:477–486. https://doi.org/10.2136/vzj2009.0154
Grøneng G, Lu M, Nilsen B, Jenssen AK (2010) Modelling of time-dependent behavior of the basal sliding surface of the Åknes rockslide area in western Norway. Eng Geol 114:414–422. https://doi.org/10.1016/j.enggeo.2010.05.017
Guhathakurta P, Khedikar S, Menon P, Prasad AK, Sangwan N (2020) Observed rainfall variability and changes over Himachal Pradesh state. IMD Annu Rep 16:28
Itasca Consulting Group (2017) FLAC3D 6.0 Modelling. 405
Johansson JMA, Edeskär T (2014) Effects of external water-level fluctuations on slope stability. Elect J Geotech Eng 19:2437–2463
Kaczmarek Ł, Mieszkowski R, Kołpaczyńsk M, Pacanowski G (2014) Application of electrical resistivity tomography (ERT) in the investigation of quaternary landslide zones, based on the selected regions of Płock slope. Stud Quat 31:101–107. https://doi.org/10.2478/squa-2014-0010
Komadja GC, Pradhan SP, Oluwasegun AD et al (2021) Geotechnical and geological investigation of slope stability of a section of road cut debris-slopes along NH-7, Uttarakhand. India Results Eng. https://doi.org/10.1016/j.rineng.2021.100227
Komadja GC, Pradhan SP, Roul AR et al (2020) Assessment of stability of a Himalayan road cut slope with varying degrees of weathering: a finite-element-model-based approach. Heliyon. https://doi.org/10.1016/j.heliyon.2020.e05297
Kundu S, Saha AK, Sharma DC, Pant CC (2013) Remote sensing and GIS-based landslide susceptibility assessment using binary logistic regression model: a case study in the Ganeshganga watershed, Himalayas. J Indian Soc Remote Sens 41:697–709. https://doi.org/10.1007/s12524-012-0255-y
Latief RH, Zainal AKE (2019) Effects of water table level on slope stability and construction cost of highway embankment. Eng J 23:1–12. https://doi.org/10.4186/ej.2019.23.5.1
Lee S, Pradhan B (2007) Landslide hazard mapping at Selangor, Malaysia using frequency ratio and logistic regression models. Landslides 4:33–41. https://doi.org/10.1007/s10346-006-0047-y
Lenka SK, Panda SD, Kanungo DP, Anbalagan (2017) Slope mass assessment of road cut rock slopes along Karnprayag to Narainbagarh Highway in Garhwal Himalayas, India. In: RMikoš M, Vilímek V, Yin Y, Sassa K (eds) Advancing culture of living with landslides. Vol. 5, Landslides in Different Environments. Ljubljana, Slovenia: 4th World Landslide Forum, pp 407–413. https://doi.org/10.1007/978-3-319-53483-110.1007/978-3-319-53483-1
Ling C, Xu Q, Zhang Q, Ran J, Lv H (2016) Application of electrical resistivity tomography for investigating the internal structure of a translational landslide and characterizing its groundwater circulation (Kualiangzi landslide, Southwest China). J Appl Geophys 131:154–162. https://doi.org/10.1016/j.jappgeo.2016.06.003
Loke MH, Chambers JE, Rucker DF, Kuras O, Wilkson PB (2013) Recent development in the direct current geoelectrical imaging method. J Appl Geophys 95:135–156
Ma Z, Zhu C, Yao X, Dang F (2021) Slope stability analysis under complex stress state with saturated and unsaturated seepage flow. Geofluids. https://doi.org/10.1155/2021/6637098
Mao JZ, Guo J, Fu Y, Zhang WP, Ding YN (2020) Effects of rapid water-level fluctuations on the stability of an unsaturated reservoir bank slope. Adv Civ Eng. https://doi.org/10.1155/2020/2360947
Matsuura S, Asano S, Okamoto T (2008) Relationship between rain and/or meltwater, pore-water pressure and displacement of a reactivated landslide. Eng Geol 101:49–59. https://doi.org/10.1016/j.enggeo.2008.03.007
Muchingami I, Hlatywayo DJ, Nel JM, Chuma C (2012) Electrical resistivity survey for groundwater investigations and shallow subsurface evaluation of the basaltic-greenstone formation of the urban Bulawayo aquifer. Phys Chem Earth 50–52:44–51. https://doi.org/10.1016/j.pce.2012.08.014
Nandi A, Shakoor A (2008) Application of logistic regression model for slope instability prediction in Cuyahoga River Watershed, Ohio, USA. Georisk 2:16–27. https://doi.org/10.1080/17499510701842221
Pareek N, Sharma ML, Arora MK (2010) Impact of seismic factors on landslide susceptibility zonation: a case study in part of Indian Himalayas. Landslides 7:191–201. https://doi.org/10.1007/s10346-009-0192-1
Peranić J, Mihalić Arbanas S, Arbanas Ž (2021) Importance of the unsaturated zone in landslide reactivation on flysch slopes: observations from Valići Landslide, Croatia. Landslides 18:3737–3751. https://doi.org/10.1007/s10346-021-01757-8
Perrone A, Lapenna V, Piscitelli S (2014) Electrical resistivity tomography technique for landslide investigation: a review. Earth-Sci Rev 135:65–82. https://doi.org/10.1016/j.earscirev.2014.04.002
Pradhan SP, Panda SD, Roul AR, Thakur M (2019) Insights into the recent Kotropi landslide of August 2017, India: a geological investigation and slope stability analysis. Landslides 16:1529–1537. https://doi.org/10.1007/s10346-019-01186-8
Rahardjo H, Nio AS, Leong EC, Song NY (2010) Effects of groundwater table position and soil properties on stability of slope during rainfall. J Geotech Geoenviron Eng 136:1555–1564. https://doi.org/10.1061/(asce)gt.1943-5606.0000385
Ray PKC, Dimri S, Lakhera RC, Sati S (2007) Fuzzy-based method for landslide hazard assessment in active seismic zone of Himalaya. Landslides 4:101–111. https://doi.org/10.1007/s10346-006-0068-6
Rezaei S, Shooshpasha I, Rezaei H (2019) Reconstruction of landslide model from ERT, geotechnical, and field data, Nargeschal landslide. Iran Bull Eng Geol Environ 78:3223–3237. https://doi.org/10.1007/s10064-018-1352-0
Roul AR, Pradhan SP, Mohanty DP (2021) Investigation to slope instability along railway cut slopes in Eastern Ghats mountain range, India: a comparative study based on slope mass rating, finite element modelling and probabilistic methods. J Earth Syst Sci. https://doi.org/10.1007/s12040-021-01711-1
Roul AR, Pradhan SP, Sahoo KC (2022) Mass movement and initiation of landslide dam burst in the Eastern Ghats. India during the Titli Cyclone 98:538–544
Roy P, Martha TR, Jain N, Vinod Kumar K (2018) Reactivation of minor scars to major landslides - a satellite-based analysis of Kotropi landslide (13 August 2017) in Himachal Pradesh, India. Curr Sci 115:395–398. https://doi.org/10.18520/cs/v115/i3/395-398
Sarkar S, Kanungo DP, Sharma S (2015) Landslide hazard assessment in the upper Alaknanda valley of Indian Himalayas. Geomatics, Nat Hazards Risk 6:308–325. https://doi.org/10.1080/19475705.2013.847501
Sazzad M, Rahman FI, Mamun AA (2016) Effects of water-level variation on the stability of slope by LEM and FEM. Int Conf Civ Eng Sustain Dev 953–959
Schnellmann R, Busslinger M, Schneider HR, Rahardjo H (2010) Effect of rising water table in an unsaturated slope. Eng Geol 114:71–83. https://doi.org/10.1016/j.enggeo.2010.04.005
Sharma P, Rawat S, Gupta AK (2019) Study and remedy of Kotropi landslide in Himachal Pradesh, India. Indian Geotech J 49:603–619. https://doi.org/10.1007/s40098-018-0343-1
Siddique T, Mondal MEA, Akbar MS et al (2022) Geoengineering evaluation of cut slopes along a landslide-prone road section in the Himalayas. J Inst Eng (India): Series A 103:905–919. https://doi.org/10.1007/s40030-022-00655-z
Siddique T, Mondal MEA, Pradhan SP et al (2020a) Geotechnical assessment of cut slopes in the landslide-prone Himalayas: rock mass characterization and simulation approach. Nat Hazards 104:413–435. https://doi.org/10.1007/s11069-020-04175-6
Siddique T, Pradhan SP, Das N et al (2020b) Stabilization of cut slopes along the highway by optimizing geometry, NH-58, Lesser Himalaya. J Geol Soc India 96:79–86. https://doi.org/10.1007/s12594-020-1507-z
Siddique T, Pradhan SP, Vishal V et al (2017) Stability assessment of Himalayan road cut slopes along National Highway 58, India. Environ Earth Sci 76:1–18. https://doi.org/10.1007/s12665-017-7091-x
Siddique T, Pradhan SP, Vishal V, Singh TN (2020c) Applicability of Q-slope method in the Himalayan road cut rock slopes and its comparison with CSMR. Rock Mech Rock Eng 53:4509–4522. https://doi.org/10.1007/s00603-020-02176-2
Siddque T, Pradhan SP (2018) Stability and sensitivity analysis of Himalayan road cut debris slopes: an investigation along NH-58, India. Nat Hazards 93:577–600. https://doi.org/10.1007/s11069-018-3317-9
Singh J, Pradhan SP, Singh M, Hruaikima L (2022a) Control of structural damage on the rock mass characteristics and its influence on the rock slope stability along National Highway-07, Garhwal Himalaya, India: an ensemble of discrete fracture network (DFN) and distinct element method (DEM). Bull Eng Geol Environ. https://doi.org/10.1007/s10064-022-02575-5
Singh J, Prasad S, Singh M, Yuan B (2022b) Modified block shape characterization method for classification of fractured rock : a python-based GUI tool. Comput Geosci 164:105125. https://doi.org/10.1016/j.cageo.2022.105125
Singh J, Thakur M (2019) Landslide stability assessment along Panchkula-Morni road, Nahan salient, NW Himalaya, India. J Earth Syst Sci 128:1–15. https://doi.org/10.1007/s12040-019-1181-y
Singh N, Gupta SK, Shukla DP (2020) Analysis of landslide reactivation using satellite data: a case study of Kotrupi landslide, Mandi, Himachal Pradesh, India. Int Arch Photogramm Remote Sens Spat Inf Sci - ISPRS Arch 42:137–142. https://doi.org/10.5194/isprs-archives-XLII-3-W11-137-2020
Telford WM, Geldart LP, Sheriff RE (1990) Applied geophysics, 2nd edn
Thakur VC, Jayangondaperumal R, Joevivek V (2019) Seismotectonics of central and NW Himalaya: plate boundary–wedge thrust earthquakes in thin- and thick-skinned tectonic framework. Geol Soc Spec Publ 481:41–63. https://doi.org/10.1144/SP481.8
Tiwari B, Ajmera B (2017) Advancing culture of living with landslides. Adv Cult Living with Landslides. https://doi.org/10.1007/978-3-319-53498-5
Xiang G, Wang CL, Bai MZ, Xu ZY, Yan JJ (2013) Stability analysis of slope under the condition of rainfall infiltration. Appl Mech Mater 405–408:256–261. https://doi.org/10.4028/www.scientific.net/AMM.405-408.256
Yang Q, Chen ZQ, Zhang DD, Shi Y (2021) Comprehensive evaluation on the stability of deposit slope from reservoir bank. IOP Conf Ser Earth Environ Sci. https://doi.org/10.1088/1755-1315/861/6/062051
Yeh PT, Lee KZZ, Chang KT (2020) 3D Effects of permeability and strength anisotropy on the stability of weakly cemented rock slopes subjected to rainfall infiltration. Eng Geol 266:105459. https://doi.org/10.1016/j.enggeo.2019.105459
Wang M, Liu K, Yang G, Xie J (2017) Three-dimensional slope stability analysis using laser scanning and numerical simulation. Geomat Nat Haz Risk 8:1–15. https://doi.org/10.1080/19475705.2017.1290696
Wang L, Yuequan S, Jun Z, Yingqiu Z (2021) Temporary confined water-induced landslide in the binary structure of a gentle slope: a case study of the Fanshantou Landslide. Water 13:5. https://doi.org/10.3390/w13050596
Zabuski L (2019) Three-dimensional analysis of a landslide process on a slope in Carpathian Flysch. Arch Hydroengineering Environ Mech 66:27–45. https://doi.org/10.1515/heem-2019-0003
Zarroca M, Bach J, Linares R, Pellicer XM (2011) Electrical methods (VES and ERT) for identifying, mapping and monitoring different saline domains in a coastal plain region (Alt Empordà, Northern Spain). J Hydrol 409:407–422. https://doi.org/10.1016/j.jhydrol.2011.08.052
Zhu D, Yan E, Hu G, Lin Y (2011) Revival deformation mechanism of Hefeng landslide in the three gorges reservoir based on FLAC 3D software. Procedia Eng 15:2847–2851. https://doi.org/10.1016/j.proeng.2011.08.536
Funding
The Ministry of Science and Technology, Government of India, funded this research through the Natural Resources Data Management System (NRDMS Programme is a geospatial technology–based which aims at promoting R&D for solving area-specific problems) division of the Department of Science and Technology (DST) New Delhi (Sanction No. NGP/LS/PRADHAN/TPN34331/2019(G)).
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Soumya Darshan Panda: fieldwork, methodology, conceptualization, numerical modeling, writing original draft, visualization. Saurabh Kumar: methodology, conceptualization, numerical modeling, editing the original draft, visualization. Sarada Prasad Pradhan: supervision, conceptualization, methodology, revision of the manuscript. Jaspreet Singh: fieldwork, conceptualization, methodology, technical inputs, and helped draft the manuscript. Abhishek Kralia: fieldwork and revision of the manuscript. Mahesh Thakur: fieldwork and revision of the manuscript. All authors have read, reviewed, and approved the manuscript.
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Panda, S.D., Kumar, S., Pradhan, S.P. et al. Effect of groundwater table fluctuation on slope instability: a comprehensive 3D simulation approach for Kotropi landslide, India. Landslides 20, 663–682 (2023). https://doi.org/10.1007/s10346-022-01993-6
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DOI: https://doi.org/10.1007/s10346-022-01993-6