Combining rainfall-induced shallow landslides and subsequent debris flows for hazard chain prediction

Zhou, Wenqi; Qiu, Haijun; Wang, Luyao; Pei, Yanqian; Tang, Bingzhe; Ma, Shuyue; Yang, Dan; Cao, Mingming

doi:10.1016/j.catena.2022.106199

Cited by 71 publications

(29 citation statements)

References 43 publications

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“…Moreover, by following the verification procedure suggested by Zhou et al (2022), the accuracy of the simulated fan was compared with the available information on the event fan. In particular, the procedure requires the definition of: i) the observed debris fan, X (see deposit of the 17/09/2015 event in Figs.…”

Section: Results Of Dynamic Analysis Of the Rochefort Debris Flowmentioning

confidence: 99%

Investigation and numerical simulation of debris flow events in Rochefort basin (Aosta Valley—NW Italian Alps) combining detailed geomorphological analyses and modern technologies

Vagnon¹,

Kurilla

Clusaz

et al. 2022

Bull Eng Geol Environ

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This paper presents a multidisciplinary approach using modern technologies for the analysis and modelling of the debris flow that occurred at Torrent Rochefort (Aosta Valley—Italy) September 2015. A detailed on-site geological and geomorphological study was performed to highlight the main characteristics of the basin, useful for validating and calibrating dynamic simulations. The total mobilized volume was estimated by comparing a pre-event DTM and a post-event DTM generated from an unmanned aerial vehicle. A digital terrain model comparative analysis provided a quantitative estimation of erodible depths in different sectors of the Rochefort basin. Numerical modelling of the event was performed using the continuum mechanics-based code RASH3D that enabled a simulation of the dynamic debris motion on complex topography. The results demonstrate the importance of a detailed geomorphological study for the validation and calibration of numerical results. Finally, some considerations were inferred about the magnitude of unstable debris and the possible consequences on local infrastructures.

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Section: Results Of Dynamic Analysis Of the Rochefort Debris Flowmentioning

confidence: 99%

Investigation and numerical simulation of debris flow events in Rochefort basin (Aosta Valley—NW Italian Alps) combining detailed geomorphological analyses and modern technologies

Vagnon¹,

Kurilla

Clusaz

et al. 2022

Bull Eng Geol Environ

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“…Knowledge is "a fact or condition of knowing something with a considerable degree of familiarity through experience, association, and contact" (Zhou et al, 2022). Hoffmann and Muttarak (2017) revealed that those who had been influenced by disaster in the past 3 years show nearly three times more preparedness behavior.…”

Section: Disaster Knowledgementioning

confidence: 99%

Impacts of Risk Perception, Disaster Knowledge, and Emotional Attachment on Tourists’ Behavioral Intentions in Qinling Mountain, China

et al. 2022

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With natural disasters occurring more frequently around the world, their impact on tourism is becoming a serious problem. The existing literature in the field of tourism disaster management focuses mostly on disaster impact analysis, risk assessment, and post-disaster recovery, while the impact of disaster on tourism and tourists is still a new topic. It is necessary to investigate the correlation between the natural disasters and the tourists’ behavior. Taking the famous tourism destination, Qinling Mountain, located in the middle of China, as an example where frequent mountain disasters happened, we investigated 542 youth group tourists using a questionnaire survey and analyzed the influence of risk perception, disaster knowledge, and emotional attachment on tourists’ travel behavioral intentions. The results showed that 1) risk perception has a negative effect on tourists’ behavioral intentions; 2) disaster knowledge and tourism emotional attachment have a positive effect on tourists’ behavioral intention; and 3) the moderation role of gender is not significant, while the moderation role of education level is significant. Therefore, this analysis is of great importance for research dealing with the theory of tourism disaster and the management practice of disaster-prone tourism destinations.

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“…The leaching test showed that, under acidic conditions, H + promoted the corrosion of carbonate rocks and made the soil stability worse. In addition, some researchers conducted a series of studies on slope stability under the effect of rainfall by obtaining landslide deformation data and established a coupling model of soilwater interactions and landslide deformation, which provided a basis for predicting natural disasters such as landslides induced by rainfall infiltration (Ma et al, 2021;Liu et al, 2022;Yang et al, 2022;Zhou et al, 2022). In summary, although previous studies have carried out a great deal of work on the influence of water-soil chemical interactions on soil strength, it is difficult to clarify the mechanism of the water-soil chemical mechanical effect due to the complexity of the soil mineral composition.…”

Section: Open Accessmentioning

confidence: 99%

Mechanical effect of clay under the acid-base action: A case study on montmorillonite and illite

et al. 2022

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To study the mechanical effect of clay under acidic and basic conditions, typical clay minerals, montmorillonite and illite, were taken as the main research objects in this study. The variation law and mechanism of the cohesive force and internal friction angle were studied by immersing the remoulded soil in HNO3 solution with pH = 3 and NaOH (alkaline waste liquid) with pH = 13.5, respectively. It was found that, under acidic conditions, a corrosion reaction between clay minerals and nitric acid occurred. Except for the medium-term, the cohesion generally shows a decreasing trend, and the internal friction angle has little change. Under alkaline conditions, the cohesion of montmorillonite-quartz sand remoulded soil decreased briefly in the early immersion stage of and increased in the middle and late stages. The internal friction angle increases steadily with the extension of immersion time. The cohesion of illite-quartz sand remoulded soil also decreased first and then increased, while the internal friction angle changed little. X-ray diffraction analysis shows that montmorillonite and illite will corrode under acidic conditions, and no new material will be generated, resulting in a decrease in soil cohesion. Under alkaline conditions, montmorillonite was seriously depleted, resulting in the formation of zeolite minerals (zeolite X, garronite) and new cement hydrated calcium silicate CSH (xonotlite). Strong alkali reacts with illite to generate sodium metaaluminate (NaAlO2) and liquid cement Na2SiO3 (sodium silicate). The formation of new cements is the main reason for the increase in cohesion under acid-base conditions, and chemical corrosion and ion exchange cause a decrease in cohesion.

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Combining rainfall-induced shallow landslides and subsequent debris flows for hazard chain prediction

Cited by 71 publications

References 43 publications

Investigation and numerical simulation of debris flow events in Rochefort basin (Aosta Valley—NW Italian Alps) combining detailed geomorphological analyses and modern technologies

Investigation and numerical simulation of debris flow events in Rochefort basin (Aosta Valley—NW Italian Alps) combining detailed geomorphological analyses and modern technologies

Impacts of Risk Perception, Disaster Knowledge, and Emotional Attachment on Tourists’ Behavioral Intentions in Qinling Mountain, China

Mechanical effect of clay under the acid-base action: A case study on montmorillonite and illite

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