Interaction between landsliding materials and the underlying erodible bed in a loess flowslide

Peng, Jianbing; Ma, Penghui; Wang, Qiyao; Zhu, Xinghua; Zhang, Fanyu; Tong, Xiaojun; Wei-liang, Huang

doi:10.1016/j.enggeo.2018.01.001

Cited by 65 publications

(19 citation statements)

References 27 publications

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“…In these cases, usefu mitigation options include minimizing irrigation water input and controlling the rise o Despite the above, studies have shown that irrigation-induced events can be avoided, e.g., [164]. A simple geological analysis of the material located below current or future agricultural projects could lead to the prevention of future episodes, specifically looking for the presence of geological components that can be stable when dry, but very collapsible when saturated such as alluvial, loess, sedimentary, or volcanic units (as shown in this review), e.g., [27,[165][166][167]. Therefore, human activities (in this case, agricultural irrigation) should include a landslide-triggering risk analysis, especially for projects located in dry climates with rainfall concentrated in summer months [115].…”

Section: Discussionmentioning

confidence: 93%

“…Either as soil mass movement [2], debris flow [3], rockfall [4], or combinations of these, landslides naturally occur because of a number of factors, which can act alone or in combination, including saturation by rain water infiltration [5][6][7][8][9][10][11] and snow melting [12], both leading to groundwater changes and seepage erosion [13][14][15]; increase in hydrostatic pressure in cracks and fractures [16]; topography [17,18]; ground shaking caused by earthquakes [19][20][21][22][23][24]; and even physical and chemical weathering [25]. Similarly, rock and soil properties strongly affect the likelihood of slope collapse [26,27], with chances increasing with certain soil textures, e.g., [28,29], and geological origin, e.g., [30], among other factors. The factors above can determine, for example, how far a landslide will travel from its origin [31], influencing how likely a populated area is to be affected by such a phenomenon.…”

Section: Introductionmentioning

confidence: 99%

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The Impact of Agricultural Irrigation on Landslide Triggering: A Review from Chinese, English, and Spanish Literature

García‐Chevesich

Wei

Ticona

et al. 2020

Water

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Landslides are considered a natural process, with hundreds of events occurring every year in many regions of the world. However, human activities can significantly affect how stable a slope or cliff is, increasing the chances of slope collapses. Moreover, agricultural irrigation has potential to saturate subsurface materials well below ground level and is known to be an important factor that can trigger landslides in many countries. A macroregional literature review of irrigation-induced landslides was developed in this investigation, considering what has been published in Chinese, English, and Spanish. A total of 115 peer-reviewed papers, books and book chapters, graduate and undergraduate theses, and government reports were found, including 82 case studies (23 in Chinese, 26 in English, and 33 in Spanish). Results from this analysis indicate that studies focusing on this important topic have increased exponentially since the 1960s, with most irrigation-induced landslides occurring in dry climates (precipitation less than 600 mm/year), with rainfall concentrated during summer months. The majority of studies have been done in the loess region of China (Asian region), followed by Peru (Latin American region), though cases were found from other macroregions (African, Indian, Russian, Angloamerican, and Indonesian). Based on this global review, new agricultural irrigation projects located in collapsible areas must include a landslide risk analysis. Cultivated areas can follow a series of measures to minimize the chances of triggering a landslide, which would put human lives, ecosystems, food production, and infrastructure at risk.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The Impact of Agricultural Irrigation on Landslide Triggering: A Review from Chinese, English, and Spanish Literature

García‐Chevesich

Wei

Ticona

et al. 2020

Water

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“…Field studies of other landslides also indicate that liquefaction can enhance slide mobility. These include the Nomash River slide (Hungr and Evans, 2004) and the Attachie slide (Fletcher et al, 2002), both in British Columbia, Canada, the Flims landslide in Switzerland (Calhoun et al, 2014), the South Jingyang Platform landslides in China (Peng et al, 2018), and the Gamahara and Kameyama debris flows in Japan (Sassa and Wang, 2005). However, basal liquefaction itself can be difficult to document, as failure surfaces are typically hidden, and surface expressions of deeper liquefaction (e.g., sand boils) are highly transient and subject to disintegration.…”

Section: Importance Of Basal Liquefactionmentioning

confidence: 99%

Role of autochthonous versus detrital micrite in depositional geometries of Middle Triassic carbonate platform systems

Guido

Mastandrea

Stefani

et al. 2016

Geological Society of America Bulletin

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Middle Triassic platforms (Formazione di Contrin, Upper Anisian) in the Italian Dolomites, southern Alps, record large changes in carbonate production and depositional geometry. The changes include variation in the abundance of detrital micrite, i.e., allochthonous calcareous mud, relative to the autochthonous micrite, which formed in situ and was syndepositionally lithified. Carbonate factory dynamics controlled the geometry of the clinostratified slope units and were probably associated with changes in oxygenation. Early Anisian low-relief platforms were followed by late Anisian, high-relief buildups, associated with basinal dysoxic-anoxic environments. The geometric evolution of the platform slopes records a progressive increase in the dip angle of clinostratifications, matched by a deepening evolution of the basinal environments. At the same time, the slope sediments record a gradual change from loose detrital micrite, characterizing the lower portion, to autochthonous micrite, dominating the upper part and recording massive syndepositional lithification. The development of the autochthonous micrite was associated with the preservation of significant amounts of organic matter. This sharp increase in automicrite formation was probably induced by a rapid change from oxic to suboxic conditions in the carbonate slope and margin environments, while anoxic conditions developed in the adjacent organic-rich basin (Moena Formation). The low oxygen level promoted the preservation of organic matter and the activity of sulfate-reducing bacteria, which in turn induced in situ deposition of autochthonous micrite through biomediated processes. This pervasive early cementation and lithification induced the development of steep platform slopes. The conceptual model distilled from this Middle Triassic case can support the interpretation of analogous buildups where the skeletal framework is subordinate to the micrite component

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“…Liquefaction is described as a phenomenon in which the shear strength of a soil body is reduced due to increased pore water pressure when it is subjected to monotonic, cyclic, or constant volume dynamic loads [1]. When a landslide occurs, the slide will impact, rub, and sometimes liquefy the bed as it slides [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In recent studies on loess landslides in the southern plateau of Jingyang, some scholars have noted the impact of loess landslides on the erodible terrace layer and the liquefaction of the near-saturated sandy silt layer caused by the impact [2,[16][17][18]. e impact-induced liquefaction during the sliding process is probably the driving force behind the high speed and long runout of these landslides on nearhorizontal terraces [2,[19][20][21], but the mechanism of this effect is not yet well understood. Pore water pressure, which plays a crucial role in the liquefaction process, is most affected by the saturation of the soil [22].…”

Section: Introductionmentioning

confidence: 99%

Impact‐Induced Liquefaction Mechanism of Sandy Silt at Different Saturations

Duan

Chenxi

et al. 2021

Advances in Civil Engineering

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Landslide-induced liquefaction has received extensive attention from scholars in recent years. In the study of loess landslides in the southern Loess Plateau of Jingyang, some scholars have noted the liquefaction of the near-saturated sandy silt layer that is caused by the impact of loess landslides on the erodible terrace. The impact-induced liquefaction triggered by landslides is probably the reason for the long-runout landslides on the near-horizontal terrace. In order to reveal the mechanism of impact-induced liquefaction, this paper investigates the development of pore pressure and the impact-induced liquefaction of sandy silt under the influence of saturation through laboratory experiments, moisture content tests, and vane shear tests. It has been found that both the total pressure and pore water pressure undergo a transient increase and decrease at the moment of impact on the soil, which takes 40–60 ms to complete and only about 20 ms to arrive at the peak. Moreover, silty sand with a saturation of more than 80° was liquefied under the impact, and the liquefaction occurred in the shallow layer of the soil body. The shear strength of the liquefied part of the soil is reduced to 1.7∼2.8 kPa. Soils with lower saturation did not liquefy. The mechanism of the impact-induced liquefaction can be described as follows: under impact, the water in the soil gradually fills the pores of the soil body as the pore size decreases, and when the contact between the soil particles is completely replaced by pore water, the soil body loses its shear strength and reaches a liquefied state. Soils in the liquefied state have a very high permeability coefficient, and the water inside the soil body migrates upward as the particles settle, resulting in high-moisture content in the upper soil.

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Interaction between landsliding materials and the underlying erodible bed in a loess flowslide

Cited by 65 publications

References 27 publications

The Impact of Agricultural Irrigation on Landslide Triggering: A Review from Chinese, English, and Spanish Literature

The Impact of Agricultural Irrigation on Landslide Triggering: A Review from Chinese, English, and Spanish Literature

Role of autochthonous versus detrital micrite in depositional geometries of Middle Triassic carbonate platform systems

Impact‐Induced Liquefaction Mechanism of Sandy Silt at Different Saturations

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