Stability analysis and treatment of a reservoir landslide under impounding conditions: a case study

Jiang, Qinghui; Wei, Wei; Xie, Ni; Zhou, Chuangbing

doi:10.1007/s12665-015-4790-z

Cited by 25 publications

(8 citation statements)

References 22 publications

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“…As the water level fluctuates, the hydraulic conductivity of rock-soil and the groundwater level are notably altered; these two factors directly influence bank stability (Fujita, 1977;Yan et al, 2010). During reservoir impounding, if the hydraulic conductivity of soil and rock masses is very high, the groundwater table along the bank increases in step with the reservoir water level, thus resulting in an increase in pore water pressure in the soil and rock masses and thereby reduce the bank stability (Fujita, 1977;Xia et al, 2015;Jiang et al, 2016). Conversely, when the hydraulic conductivity is relatively low, the rising reservoir water level will pull ahead of the groundwater level, thus increasing seepage pressure on the soil and rock masses, which is beneficial to the slope's stability (Yan et al, 2010;Xia et al, 2015).…”

Section: The Influence Of Water Level Fluctuations (Wlfs) On the Bankmentioning

confidence: 99%

“…Bank erosion, including landslide and bank collapse, occurs within the littoral zone of reservoir directly damage the hydraulic structures (Wang et al, 2007;Alimohammadlou et al, 2013). Specifically, large rock-soil masses fall into the reservoir at high-speed cause surges and thus seriously threaten the safe operation of the dam, as well as the lives and property of people around the reservoir (Song et al, 2015;Jiang et al, 2016). Furthermore, the rock-soil masses discharged into the reservoir leads to sedimentation and consequential decrease in the dam's effective storage capacity (Jiang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, large rock-soil masses fall into the reservoir at high-speed cause surges and thus seriously threaten the safe operation of the dam, as well as the lives and property of people around the reservoir (Song et al, 2015;Jiang et al, 2016). Furthermore, the rock-soil masses discharged into the reservoir leads to sedimentation and consequential decrease in the dam's effective storage capacity (Jiang et al, 2016). One of the most catastrophic bank failures on record was the disastrous landslide of the Vaiont Reservoir on the Piave River, Italy, in 1963, which caused deadly consequences with more than 2000 fatalities (Barla and Paronuzzi, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…In general, bank erosion is mainly caused by natural factors, such as heavy rainfall and earthquakes, anthropogenic activities, such as deforestation, road operation, mining and construction (Iverson, 2000;Pradhan and Lee, 2010;Xu et al, 2012;Alimohammadlou et al, 2013;Duan et al, 2016). However, the failure of the bank in a reservoir is mainly caused by the periodic alternation of drying and wetting of the riparian zone, according to water level regulations (Xia et al, 2013;Johansson and Edeskär, 2014;Wang et al, 2014;Yang et al, 2014;Jiang et al, 2016;Sun et al, 2017b). With the impoundment of the reservoir, the potential sliding surface at the bottom of the rock slope is softened or muddied along with the rising groundwater level, increase pore water pressure and subsequently decrease the bank's sheer strength (Fujita, 1977;Yan et al, 2010;Xia et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Distribution and Susceptibility Assessment of Collapses and Landslides in the Riparian Zone of the Xiaowan Reservoir

Zhong

et al. 2018

Chin. Geogr. Sci.

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The southwest alpine gorge region is the major state base of hydropower energy development in China and hence planned many cascading hydropower stations. After the reservoir impoundment, the intense water level fluctuations under the interaction of cascade dams operating and the mountainous flooding, usually cause bank collapse, landslide and debris flow hazards. The Xiaowan reservoir (XWR), for example, as the 'dragon head' meg reservoir located in the middle mainstream of Lancang River, have resulted in a series of geohazards during its building and operating. In this study, we investigated the number and surface area of collapses and landslides (CLs) occurred in the water level fluctuations zone (WLFZ) of XWR using remote sensing images of Gaofen-1 and Google Earth; evaluated the CLs susceptibility using information value method. The results presented that the total WLFZ area of 87.03 km 2 and 804 CLs masses with a total area of 1.98 km 2 were identified in the riparian zone of XWR. CLs mainly occurred at an elevation of 1190-1240 m, and the CLs density increased with an increase in altitude. The WLFZ with a slope gradient of 25°-45° is the main CLs distribution area that accounts for more than half of the total CLs area. The susceptibility assessment revealed that high and very high susceptibility zones are generally distributed along zones with an elevation of 1210-1240 m, a slope degree of 25°-45° and a slope aspect perpendicular to the direction of Lancang River. Furthermore, these susceptible zones are close in distance to the dam site and tend to be in the riparian zones with the formation lithology of Silurian strata. These results provide a valuable contribution to prevent and control geohazards in the XWR area. Moreover, this study offers a constructive sample of geohazards assessment in the riparian zone of large reservoirs throughout the mountains of southwest China.

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Section: The Influence Of Water Level Fluctuations (Wlfs) On the Bankmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distribution and Susceptibility Assessment of Collapses and Landslides in the Riparian Zone of the Xiaowan Reservoir

Zhong

et al. 2018

Chin. Geogr. Sci.

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“…2007; Kim and Ann, 2001;Teloglou and Bansal, 2012;Bansal, 2012;Basha, 2013;Moutsopoulos, 2013]. But as most natural banks are sloping, the vertical boundary assumption is not sufficient [Jiang et al, 2016]. When the water level fluctuates, the head acting on the sloping boundary varies in both time and space.…”

Section: Introductionmentioning

confidence: 99%

Approximate analytical solution to the Boussinesq equation with a sloping water‐land boundary

Tang

Jiang

Zhou

2016

Water Resources Research

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An approximate solution is presented to the 1-D Boussinesq equation (BEQ) characterizing transient groundwater flow in an unconfined aquifer subject to a constant water variation at the sloping water-land boundary. The flow equation is decomposed to a linearized BEQ and a head correction equation. The linearized BEQ is solved using a Laplace transform. By means of the frozen-coefficient technique and Gauss function method, the approximate solution for the head correction equation can be obtained, which is further simplified to a closed-form expression under the condition of local energy equilibrium. The solutions of the linearized and head correction equations are discussed from physical concepts. Especially for the head correction equation, the well posedness of the approximate solution obtained by the frozencoefficient method is verified to demonstrate its boundedness, which can be further embodied as the upper and lower error bounds to the exact solution of the head correction by statistical analysis. The advantage of this approximate solution is in its simplicity while preserving the inherent nonlinearity of the physical phenomenon. Comparisons between the analytical and numerical solutions of the BEQ validate that the approximation method can achieve desirable precisions, even in the cases with strong nonlinearity. The proposed approximate solution is applied to various hydrological problems, in which the algebraic expressions that quantify the water flow processes are derived from its basic solutions. The results are useful for the quantification of stream-aquifer exchange flow rates, aquifer response due to the sudden reservoir release, bank storage and depletion, and front position and propagation speed.

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Reservoir Landslides and Its Hazard Effects for the Hydropower Station: A Case Study

Zhou¹,

Lu²,

Yang³

2017

Advancing Culture of Living With Landslides

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Stability analysis and treatment of a reservoir landslide under impounding conditions: a case study

Cited by 25 publications

References 22 publications

Distribution and Susceptibility Assessment of Collapses and Landslides in the Riparian Zone of the Xiaowan Reservoir

Distribution and Susceptibility Assessment of Collapses and Landslides in the Riparian Zone of the Xiaowan Reservoir

Approximate analytical solution to the Boussinesq equation with a sloping water‐land boundary

Reservoir Landslides and Its Hazard Effects for the Hydropower Station: A Case Study

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