Relationship between landslide stability and reservoir water level variation

Xia, Min; Ren, Gaofeng; Zhu, Shao Shuai; Lei, Xin

doi:10.1007/s10064-014-0654-0

Cited by 61 publications

(24 citation statements)

References 10 publications

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“…Correspondingly, the extent of the development and distribution of landslides in the Dagangshan reservoir is not very prominent relative to other reservoirs in southwest China, such as the Maoergai reservoir (Zhou et al 2017) and the Jinping-I reservoir. Form the viewpoint of reservoir operation, the reservoir water level variation has some close relationship with the development of reservoir landslide (Xia et al 2015). The Dagangshan reservoir is a daily regulation reservoir, the total storage capacity of which is 7.47 Â 10 8 m 3 with a regulating storage capacity of 1.17 Â 10 8 m 3 , so the regulating storage ratio is approximately 16%, which is a relatively smaller value than that of the Moergai (82.8%) and Jinping-I (63.3%) reservoirs.…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal distribution and failure mechanism analyses of reservoir landslides in the Dagangshan reservoir, south-west China

Zhang

Yang

et al. 2018

Geomatics, Natural Hazards and Risk

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Reservoir impoundment and water fluctuations have endangered the stability of the reservoir bank slopes, which have experienced several small-scale shallow slides/collapses and few large-scale slopes with failures/deformations. Field investigations, unmanned aerial vehicle technology and site displacement monitoring dates are used to study the spatiotemporal distribution and mechanisms of the reservoir landslides within the Dagangshan reservoir. The reservoir landslides can be divided into two main types: shallow small-scale slides and unstable deformation slopes, which are clearly associated with reservoir impoundment and fluctuations of the water level. Small-scale slides/collapses are continually distributed along the river banks nearest to the water level, but deepseated landslides have usually experienced a long history, and some obvious precursor phenomena may exist in the slopes. According to the recognition of deformational and failure evolutionary processes of large-scale slopes, and based on hydrology and geomechanics, two types of potential failure models (creep-shear-tension failure and toppling-tensile-shear model) are proposed to interpret the mechanisms of the deformation slopes in the Dagangshan reservoir. Furthermore, some preliminary discussion is presented concerning the non-significant development of landslides in the Dagangshan reservoir that are also associated with smaller water fluctuations due to the daily regulation type of the reservoir.

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Section: Discussionmentioning

confidence: 99%

Spatiotemporal distribution and failure mechanism analyses of reservoir landslides in the Dagangshan reservoir, south-west China

Zhang

Yang

et al. 2018

Geomatics, Natural Hazards and Risk

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“…Therefore, there should be correlation between the reservoir water level and the surface displacement. Min Xia et al [13] pointed out that the stability of the landslide is influenced by the rate of fluctuation in the level of the reservoir. In Figure 4, we can see this phenomenon in July 2015; during that month, the sites in the early warning zone had a large displacement after a rapid decline in the reservoir water level.…”

Section: Reservoir Water Level Correlation Analysismentioning

confidence: 99%

An Attempt to Quantify the Lag Time of Hydrodynamic Action Based on the Long-Term Monitoring of a Typical Landslide, Three Gorges, China

Chen

Zhang

et al. 2018

Mathematical Problems in Engineering

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Hydrodynamic action plays an important role in the development of reservoir bank accumulational landslides. Despite recent concern over hydrodynamic action’s hysteresis effects, there is still no unified efficient method for quantifying lag time, which is a critical input to landslide prediction and early warning systems. To address this shortcoming, we selected a typical landslide, located in Three Gorges Reservoir, China, as a case study. On the basis of long-term monitoring data, we suggest that correlation analysis may work and attempt to use linear correlation first to quantify the lag time. We conclude that, from the macroscopic behavior point of view, linear correlation analysis does not work; neither the daily reservoir water level and its variation nor the daily rainfall and its accumulation exhibit a linear relationship with the surface accumulative displacement. Future studies will use nonlinear correlation analysis to analyze data by different time segments as the hydrodynamic factors have different effects in different periods.

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“…Observations that landslide deformation is associated with the reservoir drawdown have been widely reported [4][5][6][7][8]. The dynamic seepage pressure pointing outwards the slope is a crucial factor for deforming landslides after water level drawdown [9][10][11], especially when the landslide material has a low hydraulic conductivity [12]. Landslides were often found to show a retrogressive failure characteristic under drawdown conditions [10,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Model Test and Numerical Analysis on the Deformation and Stability of a Landslide Subjected to Reservoir Filling

Zhou

et al. 2019

Geofluids

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Reservoir filling can affect the landslide stability and cause the landslide deformation within the reservoir area. In this paper, a physical model test and a series of numerical analyses were combined to investigate the landslide deformation and stability under reservoir filling. The surface deformation, deep displacement, and pore water pressure were recorded during the physical model test. In the model test, the increasing period of the pore water pressure inside the landslide is proposed to be a critical period for the landslide subjected to the reservoir filling. During this period, large landslide deformation occurred. The numerical analyses show that a greater factor of safety (FOS) appeared under a higher water level rising rate or a lower permeability coefficient during the water level rising stage when other variables are fixed, due to the domination of the reservoir buttressing effect which can increase the landslide resistance. During the reservoir maintaining stage, the reservoir water infiltrated into the landslide continuously to cause the matric suction dissipation and pore water pressure increase, which reduced the landslide shear strength and then decreased the landslide stability.

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Relationship between landslide stability and reservoir water level variation

Cited by 61 publications

References 10 publications

Spatiotemporal distribution and failure mechanism analyses of reservoir landslides in the Dagangshan reservoir, south-west China

Spatiotemporal distribution and failure mechanism analyses of reservoir landslides in the Dagangshan reservoir, south-west China

An Attempt to Quantify the Lag Time of Hydrodynamic Action Based on the Long-Term Monitoring of a Typical Landslide, Three Gorges, China

Model Test and Numerical Analysis on the Deformation and Stability of a Landslide Subjected to Reservoir Filling

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