Effect of hydraulic properties of soil and fluctuation velocity of reservoir water on landslide stability

Song, Kun; E, Yan; Zhang, Guodong; Lu, Shuqiang; Yi, Qinglin

doi:10.1007/s12665-015-4541-1

Cited by 41 publications

(17 citation statements)

References 22 publications

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“…Jian et al [19] calculated the seepage and stability of the Qianjiangping landslide under a combination of rainfall and reservoir water level fluctuations. Song et al [20] carried out a numerical analysis of the seepage characteristics and slope stability under different reservoir water drawdown rates. Huang et al [21] analyzed and discussed the seepage and stability characteristics of a slope with different soil permeability.…”

Section: Introductionmentioning

confidence: 99%

Seepage, Deformation, and Stability Analysis of Sandy and Clay Slopes with Different Permeability Anisotropy Characteristics Affected by Reservoir Water Level Fluctuations

Ren

Zhang

et al. 2020

Water

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Evaluation of slope stability under water level fluctuations is an important topic in the Three Gorges Reservoir (TGR) in China. However, most of the previous studies regarded slope soil as isotropic material, or only considered the influence of anisotropy ratio (kr = kx/ky) but ignored the anisotropy direction (α). Meanwhile, the pore pressure–stress coupling was rarely considered in the previous numerical simulations. In the present study, the SIGMA/W and SLOPE/W modules in Geo-studio are utilized to carry out the numerical simulation of Caipo slope under the drawdown of the reservoir water level, and the anisotropy ratio (kr) as well as the anisotropy direction (α) of two kinds of soils (clay and sand) are included. Results show that the anisotropy ratio kr and anisotropy direction α decrease the infiltration capacity of the soil, which increases the infiltration line hysteretic elevation (ILHE) as well as maximum horizontal displacement (MHD), and reduces the minimum safety factor (MSF). The slope toe firstly fails with the drawdown of water level. The influence of reservoir water level drop on seepage, deformation, and stability of the sand slope is less than that of the clay slope. For the sandy soil slope, it is not only necessary to consider the influence of kr, but also the influence of α. For the soil slope, we can only consider α in order to simplify calculation.

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Section: Introductionmentioning

confidence: 99%

Seepage, Deformation, and Stability Analysis of Sandy and Clay Slopes with Different Permeability Anisotropy Characteristics Affected by Reservoir Water Level Fluctuations

Ren

Zhang

et al. 2020

Water

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“…Landscape resilience and stability are affected by the soil system which is in turn affected by the inherent balance between inputs and losses of nutrients and carbon [62]. Indicators assessing resilience of production functions include soil health variables such as total and mineralizable N and total C [113], soil organic matter [114], mineral P and K [115], pH and cation exchange capacity [116], soil physical properties [117], texture [118], structural stability [119], and soil-water relations. Work [120] has proposed a system evaluating sensitivity of land to degradation (ESAI) that combines soil properties with other factors (climatic, vegetation, and social]).…”

Section: Soil Degradationmentioning

confidence: 99%

Envisioning Present and Future Land-Use Change under Varying Ecological Regimes and Their Influence on Landscape Stability

et al. 2019

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Climate change plays an important role in shaping ecological stability of landscape systems. Increasing weather fluctuations such as droughts threaten the ecological stability of natural and anthropogenic landscapes. Uncertainty exists regarding the validity of traditional landscape assessment schemes under climate change. This commentary debates the main factors that threaten ecological stability, discussing basic approaches to interpret landscape functioning. To address this pivotal issue, the intimate linkage between ecological stability and landscape diversity is explored, considering different approaches to landscape stability assessment. The impact of land-use changes on landscape stability is finally discussed. Assessment methodologies and indicators are reviewed and grouped into homogeneous classes based on a specific nomenclature of stability aspects which include landscape composition, fragmentation and connectivity, thermodynamic and functional issues, biodiversity, soil degradation, and ecological disturbance. By considering land-use change as one of the most important factors underlying climate change, individual components of landscape stability are finally delineated and commented upon. In this regard, specific trajectories of land-use change (including agricultural intensification, land abandonment, and urbanization) are investigated for their effects on ecological stability. A better understanding of land-use impacts on landscape stability is crucial for a better knowledge of processes leading to land degradation.

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“…It is important to study the variations in the stability coefficient of the hydrodynamic pressure landslide for different permeability coefficients and increases in the rate of decline in the reservoir water level. In this study, the rate of decrease of the stability coefficient (RDSC) is used [20]. RDSC donates the rate of decrease in the stability coefficient of a hydrodynamic pressure landslide for a certain permeability coefficient when the rate of drawdown of the reservoir water level changes from 0.6 m/d to 1.2 m/d.…”

Section: Stability Coefficient Of the Hydrodynamic Pressure Landslidementioning

confidence: 99%

“…As a result, the landslide stability coefficient varies based on changes in the reservoir water level and saturated permeability coefficient [13,[16][17][18][19]. Notably, some studies have shown that the seepage fields and stability coefficients of reservoir landslides in the TGRA are affected by fluctuations in the reservoir water level [20][21][22][23][24]. Furthermore, Xiang, et al [25] studied the stability coefficient of a hydrodynamic pressure landslide affected by reservoir water level fluctuations; Chen and Liu [26] studied the seepage field and stability coefficient variations of a reservoir landslide in the TGRA based on different permeability coefficients; and Hsu and Chien [27] studied the landslide stability coefficient under extreme climates.…”

Section: Introductionmentioning

confidence: 99%

“…Jian, et al [30] analyzed the seepage field of the Qianjiangping landslide in TGRA at various rainfall rates and reservoir water levels. Song, Yan, Zhang, Lu and Yi [20] studied the effects of the hydraulic properties of the soil and the fluctuation velocity of reservoir water on landslide stability. Chien, et al [31] used a finite element model to determine the stability coefficients of regional shallow landslides induced by extreme rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Stability Analysis of Hydrodynamic Pressure Landslides with Different Permeability Coefficients Affected by Reservoir Water Level Fluctuations and Rainstorms

Huang

Luo

Liu

2017

Water

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Abstract:It is significant to study the variations in the stability coefficients of hydrodynamic pressure landslides with different permeability coefficients affected by reservoir water level fluctuations and rainstorms. The Sifangbei landslide in Three Gorges Reservoir area is used as case study. Its stability coefficients are simulated based on saturated-unsaturated seepage theory and finite element analysis. The operating conditions of stability coefficients calculation are reservoir water level variations between 175 m and 145 m, different rates of reservoir water level fluctuations, and a three-day continuous rainstorm. Results show that the stability coefficient of the hydrodynamic pressure landslide decreases with the drawdown of the reservoir water level, and a rapid drawdown rate leads to a small stability coefficient when the permeability coefficient ranges from 1.16 × 10 −6 m/s to 4.64 × 10 −5 m/s. Additionally, the landslide stability coefficient increases as the reservoir water level increases, and a rapid increase in the water level leads to a high stability coefficient when the permeability coefficient ranges from 1.16 × 10 −6 m/s to 4.64 × 10 −5 m/s. The landslide stability coefficient initially decreases and then increases as the reservoir water level declines when the permeability coefficient is greater than 4.64 × 10 −5 m/s. Moreover, for structures with the same landslide, the landslide stability coefficient is most sensitive to the change in the rate of reservoir water level drawdown when the permeability coefficient increases from 1.16 × 10 −6 m/s to 1.16 × 10 −4 m/s. Additionally, the rate of decrease in the stability coefficient increases as the permeability coefficient increases. Finally, the three-day rainstorm leads to a significant reduction in landslide stability, and the rate of decrease in the stability coefficient initially increases and then decreases as the permeability coefficient increases.

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Effect of hydraulic properties of soil and fluctuation velocity of reservoir water on landslide stability

Cited by 41 publications

References 22 publications

Seepage, Deformation, and Stability Analysis of Sandy and Clay Slopes with Different Permeability Anisotropy Characteristics Affected by Reservoir Water Level Fluctuations

Seepage, Deformation, and Stability Analysis of Sandy and Clay Slopes with Different Permeability Anisotropy Characteristics Affected by Reservoir Water Level Fluctuations

Envisioning Present and Future Land-Use Change under Varying Ecological Regimes and Their Influence on Landscape Stability

Stability Analysis of Hydrodynamic Pressure Landslides with Different Permeability Coefficients Affected by Reservoir Water Level Fluctuations and Rainstorms

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