Occurrence of shallow landslides triggered by increased hydraulic conductivity due to tree roots

Qin, Mingyue; Cui, Peng; Guo, Jian; Zhang, Guotao

doi:10.1007/s10346-022-01921-8

Cited by 25 publications

(8 citation statements)

References 82 publications

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“…Finally, the results of this study provide some theoretical basis for assessing geohazards. Specifically, as the motion of debris flows or the initiation of landslides is closely related to the hydrodynamic conditions of the geological body (Qin et al., 2022; Tang et al., 2019; Y. Xie et al., 2022), the permeability evolution model established in this study serves as an important constitutive model for investigating the hydrodynamic conditions of moraine‐relevant geohazards in cold alpine regions. Furthermore, many experiments have revealed that the ice content has an important influence on the mechanical strength of soils (Arenson & Springman, 2005; Li et al., 2022; Ma et al., 2022).…”

Section: Discussionmentioning

confidence: 99%

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Zhou,

Zhu,

et al. 2023

Water Resources Research

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A warming environment is promoting the thawing process in ice‐rich moraine soils in cold alpine regions, thereby accelerating the formation/development of geohazards in these regions. The mechanism of these geohazards is closely related to the thermal‐hydraulic (TH) coupling behavior of moraine soils, which has rarely been investigated. Here, we conducted a series of bench‐scale TH coupling simulations of moraine soils with ice inclusions in a warming environment. The numerical model was conceptualized from a field survey on the Qinghai‐Tibet Plateau, which consists of a porous medium embedded with multilayer ice cubes with warmer water continuously flowing through it. A TH coupling framework considering ice‐water phase change was established to implement this coupled simulation with different initial ice contents and hydraulic gradients. The simulated results showed phased and nonlinear evolutionary features of temperature, ice content, and permeability for the moraine soil system. Further analyses showed that these complex evolutionary features can be reproduced by empirical formulas, with concise expressions following dimensional consistency and some coefficients having potential physical meanings. The discriminant models of two equilibrium states were finally developed to predict the critical times of structure stabilization and thermal equilibrium of the moraine soil system. This study presents the complex evolution of TH coupling properties of moraine soils, and simultaneously demonstrates that these properties can be predicted and characterized.

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Section: Discussionmentioning

confidence: 99%

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Zhou,

Zhu,

et al. 2023

Water Resources Research

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“…Laboratory tests have also been conducted to study the effects of vegetation on the hydrology of slope stability. For example, Chen et al (2021) and Qin et al (2022) discussed how the vegetation type can induce different hydrological effects on the permeability and water storage capacity of slope soil, improving the erosion resistance and so playing a suitable and not negligible role in slope stability response. Yildiz et al (2019), based on the results of experiments on root-permeated specimens in an inclinable large-scale direct shear apparatus, studied the contribution of plant-induced suction to shear strength for root-permeated soils, planted with combinations of different species.…”

Section: Understanding Landslide Hydrological Processes Through Exper...mentioning

confidence: 99%

“…For instance, Balzano et al (2019) analyzed shallow landslides in Scotland, where the rhizosphere, that is, the portion of soil directly affected by plant roots, was characterized by hydraulic conductivity higher than the underlying soil, thus promoting the lateral diversion of water with beneficial effects for slope stability. Differently, Qin et al (2022) analyzed the hydrological effect of root distribution in lab and field measurements and showed that the higher permeability in the rooted topsoil compared to underlying, nonrooted zone, can have the opposite effect, promoting high infiltration rates and building up critical pore pressures in case of high‐intensity rain events. Masi et al (2021) published a recent review on the multiple hydrological (e.g., suction, canopy interception, infiltration‐subsurface flows) and mechanical (soil reinforcement, surcharge, buttressing, deep anchoring, rock fracturing) effects of vegetation on slope stability, also providing an inventory of papers published worldwide between 2015 and 2020.…”

Section: The Hydrology Perspective In Landslide Researchmentioning

confidence: 99%

Recent advancements of landslide hydrology

2023

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Occurrence of rainfall‐induced landslides is increasing worldwide, owing to land use and climate changes. Although the connection between hydrology and rainfall‐induced landslides might seem obvious, hydrological processes have been only marginally considered in landslide research for decades. In 2016, an advanced review paper published in WIREs Water [Bogaard and Greco (2016), WIREs Water, 3(3), 439–459] pointed out several challenging issues for landslide hydrology research: considering large‐scale hydrological processes in the assessment of slope water balance; including antecedent hydrological information in landslide hazard assessment; understanding and quantifying the feedbacks between deformation and infiltration/drainage processes; overcoming the conceptual mismatch of soil mechanics models and hydrological models. While little progress has been made on the latter two issues, a variety of studies have been published, focusing on the role of hydrological processes in landslide initiation and prediction. The importance of the identification of the origin of water to understand the processes leading to landslide activation is largely acknowledged. Techniques and methodologies for the definition of landslide catchments and for the assessment of landslide water balance are progressing fast, often considering the hydraulic effect of vegetation. The use of hydrological information in landslide prediction models has also progressed enormously. Empirical predictive tools, to be implemented in early warning systems for shallow landslides, benefit from the inclusion of antecedent soil moisture, extracted from different sources depending on the scale of the prediction, leading to significant improvement of their predictive skill. However, this kind of information is generally still missing in operational LEWS.This article is categorized under: Science of Water > Hydrological Processes

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“…The biological reclamation using vegetation (bioengineering) is a more sustainable, aesthetically appealing and cost-effective approach to cope with the problems of the OB dump (Gerhardt et al 2009;Li et al 2016;Robinson et al 2015; Sheoran et al 2016). Plants' slope stabilization function includes mechanical (root) reinforcement (present study), hydrological reinforcement, and interception (Qin et al 2022;Wang et al 2020). Soil reinforcement to improve the shear strength through plant roots depends on the root distribution, root density, and root strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of grass species root for enhanced slope protection in amended coalmine overburden dump soil

Kumar,

Das,

Nainegali

et al. 2023

Plant Soil

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Background and AimsSurface protection of coalmine overburden (OB) dumps against shallow slope failures can be achieved through a cost-effective and sustainable solution, i.e., vegetative cover. Hence, small scale study is needed to study the survival, growth performance, and root distribution of plants prior to conducting pilot scale study. MethodsIn the present study, three plant species Dendrocalamus strictus (Bamboo grass), Cymbopogon citratus (Lemon grass), and Chrysopogon zizanioides (Vetiver grass), an endemic grass species are studied for the slope stabilization potential of OB dumps in Jharkhand, India. Growth characteristics and root architecture of grasses grown for ve months under six varying proportions (treatments) of overburden, cow dung, and garden soil were studied. ResultsIt was found that Vetiver grass had the highest root area ratio, followed by Bamboo grass and Lemon grass. The maximum root cohesion was found to be 1 kPa for Bamboo grass, 7.33 kPa for Lemon grass, and 9.24 kPa for Vetiver grass among different treatments. ConclusionsTreatment condition with 80% overburden and 20% cow dung was suggested to be the best soil mix for optimum growth of the chosen grasses which have the potential to mitigating sur cial movement of soil mass on the overburden dumps through root reinforcement.

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Occurrence of shallow landslides triggered by increased hydraulic conductivity due to tree roots

Cited by 25 publications

References 82 publications

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Characterization of Thermal‐Hydraulic Coupling Behavior for Moraine Soil With Ice Inclusions in a Warming Environment

Recent advancements of landslide hydrology

Effect of grass species root for enhanced slope protection in amended coalmine overburden dump soil

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