A long-term field study for the investigation of rainfall-induced landslides

Springman, Sarah M.; Thielen, A.; Kienzler, Peter; Friedel, S.

doi:10.1680/geot.11.p.142

Cited by 112 publications

(49 citation statements)

References 28 publications

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“…Matsushi et al (2006) analysed rainwater infiltration and groundwater fluxes towards underlying permeable bedrock, which leads to the development of shallow landslides. Some works identified the time changes of the hydrological features of unsaturated soils, which then provoked the triggering of shallow landslides (Matsushi and Matsukura, 2007;Godt et al, 2009;Damiano et al, 2012;Springman et al, 2013). In particular, Godt et al (2009) were the first to observe the development of a shallow soil failure in unsaturated conditions linked to a rainfall event in a natural setting.…”

Section: Introductionmentioning

confidence: 99%

Site-specific to local-scale shallow landslides triggering zones assessment using TRIGRS

Bordoni

Meisina

Valentino

et al. 2015

Nat. Hazards Earth Syst. Sci.

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Abstract. Rainfall-induced shallow landslides are common phenomena in many parts of the world, affecting cultivation and infrastructure and sometimes causing human losses. Assessing the triggering zones of shallow landslides is fundamental for land planning at different scales. This work defines a reliable methodology to extend a slope stability analysis from the site-specific to local scale by using a wellestablished physically based model (TRIGRS-unsaturated). The model is initially applied to a sample slope and then to the surrounding 13.4 km 2 area in Oltrepò Pavese (northern Italy). To obtain more reliable input data for the model, longterm hydro-meteorological monitoring has been carried out at the sample slope, which has been assumed to be representative of the study area. Field measurements identified the triggering mechanism of shallow failures and were used to verify the reliability of the model to obtain pore water pressure trends consistent with those measured during the monitoring activity. In this way, more reliable trends have been modelled for past landslide events, such as the April 2009 event that was assumed as a benchmark. The assessment of shallow landslide triggering zones obtained using TRIGRSunsaturated for the benchmark event appears good for both the monitored slope and the whole study area, with better results when a pedological instead of geological zoning is considered at the regional scale. The sensitivity analyses of the influence of the soil input data show that the mean values of the soil properties give the best results in terms of the ratio between the true positive and false positive rates. The scheme followed in this work allows us to obtain better results in the assessment of shallow landslide triggering areas in terms of the reduction in the overestimation of unstable zones with respect to other distributed models applied in the past.

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Section: Introductionmentioning

confidence: 99%

Site-specific to local-scale shallow landslides triggering zones assessment using TRIGRS

Bordoni

Meisina

Valentino

et al. 2015

Nat. Hazards Earth Syst. Sci.

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“…Some examples of in situ monitoring of water regimes in unsaturated slopes are reported in the literature (Springman et al, 2013;Cascini and Sorbino, 2002;Smethurst et al, 2006), albeit carried out on a wide range of soils and hence with non-comparable findings. In situ monitoring allows hydraulic slope behaviour to be http://dx.doi.org/10.1016/j.jhydrol.2015.06.005 0022-1694/Ó 2015 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

Soil water balance in an unsaturated pyroclastic slope for evaluation of soil hydraulic behaviour and boundary conditions

Pirone

Papa

Nicotera

et al. 2015

Journal of Hydrology

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“…Since their developments, these instruments have also found utilisation in some geotechnical problems, most commonly in the field of monitoring landslides (e.g. Bordoni et al, 2015;Cascini et al, 2014;Pirone et al, 2015;Springman et al, 2013) or changes in the soil volume due to seasonal variations of water content for the purpose of foundation design (Harris et al, 2013;Nguyen et al, 2010) and river embankments (Casagli et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

A new technique for deep in situ measurements of soil water retention behaviour

Rocchi

Gragnano

Govoni

et al. 2018

Geotechnical Research

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In situ measurements of soil suction and water content in deep soil layers still represent an experimental challenge. Mostly developed within agriculture-related disciplines, field techniques for the identification of soil retention behaviour have been so far employed in the geotechnical context to monitor shallow landslides and seasonal volume changes beneath shallow foundations, within the most superficial ground strata. In this paper, a novel installation technique is presented, discussed and assessed, which allows extension of the use of commercially available low-cost and low-maintenance instruments to characterise deep soil layers. Multi-depth installations have been successfully carried out using two different sensor types to measure the soil suction and water content up to 7 m from the soil surface. Preliminary laboratory investigations were also shown to provide a reasonable benchmark to the field data. The results of this study offer a convenient starting point to accommodate important geotechnical works such as river and road embankments in the traditional monitoring of unsaturated soil variables.

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A long-term field study for the investigation of rainfall-induced landslides

Cited by 112 publications

References 28 publications

Site-specific to local-scale shallow landslides triggering zones assessment using TRIGRS

Site-specific to local-scale shallow landslides triggering zones assessment using TRIGRS

Soil water balance in an unsaturated pyroclastic slope for evaluation of soil hydraulic behaviour and boundary conditions

A new technique for deep in situ measurements of soil water retention behaviour

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