Stability analysis of a typical landslide mass in the Three Gorges Reservoir under varying reservoir water levels

2020 ◽  
Vol 79 (1) ◽  
Author(s):  
Yonggang Zhang ◽  
Zhen Zhang ◽  
Shuai Xue ◽  
Ruijie Wang ◽  
Mao Xiao
Keyword(s):  
Stability Analysis ◽  
Three Gorges Reservoir ◽  
Water Levels ◽  
Three Gorges ◽  
Reservoir Water ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Landslide Mass

scholarly journals Stability Analysis of the Shiliushubao Landslide Based on Deformation Characteristics and External Trigger Factors in the Three Gorges Reservoir

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Guilin Luo ◽  
Guangming Ren ◽  
Xiaojun Bao ◽  
Xili Yang ◽  
Teng Liu
Keyword(s):  
Stability Analysis ◽  
Three Gorges Reservoir ◽  
Seasonal Fluctuation ◽  
Deformation Characteristics ◽  
Three Gorges ◽  
Trigger Factors ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Landslide Mass ◽  
The Stability

There exists the problem of landslide reactivation due to the seasonal fluctuation of rainfall and reservoir water level annually. Based on a large number of GPS monitoring data of the landslide mass after impoundment of the Three Gorges Reservoir in Shiliushubao landslide area, the relationship between the external trigger factors and slope stability could be obtained. A finite element calculation model has been established for the stability analysis of the Shiliushubao landslide after impoundment from January 2004 to October 2009. Through the deformation characteristics of the landslide, it is shown that the landslide exhibited a stepwise pattern on the whole, which developed faster after impoundment and slowed down in rainy seasons. The trend of the curve kept roughly opposite to the fluctuation of the safety factor. It suggested that the stability of the landslide mass was closely related to the seasonal fluctuation of the rainfall and the reservoir level, and the landslide deposits demonstrated to be reactive with them. The subject provides a certain reference value on the landslide stability analysis and the risk assessment within a similar engineering geological condition.

Water Environment Risk Assessment System and Practice of Management for the Three Gorges Reservoir Based on List Method

2011 ◽  
Vol 71-78 ◽  
pp. 4288-4292
Author(s):  
Li Ping Guo ◽  
Ju Mei Liu ◽  
Shuang Kou Chen
Keyword(s):  
Risk Assessment ◽  
Environmental Risk ◽  
Three Gorges Reservoir ◽  
Water Environment ◽  
Assessment System ◽  
Three Gorges ◽  
Reservoir Water ◽  
The Three Gorges Reservoir ◽  
Industrial Enterprises ◽  
The Three Gorges

In view of the water impact of environmental risk of industrial enterprises in the Three Gorges Reservoir, based on the existing methods of water environmental risk assessment and integrated the Germany detailed list assessment method; we have established a brand-new index system which could meet with the Three Gorges Reservoir water environment risk evaluation, and the system has the feature of quantitative indicators and risk classification. Site Case analysis showed that: evaluation results and the qualitative judgment are on the spot consistent with the environment Supervisory department, which demonstrated that the risk assessment system is reasonable and has easier operability. Meanwhile the system could help the enterprise and the environment Supervisory department to investigate water environment hidden danger, reduce the enterprise water environment risk effectively and provide the scientific basis for the environment Supervisory management's decision-making and the management.

Soil erosion in the riparian zone of the Three Gorges Reservoir, China

2013 ◽  
Vol 46 (2) ◽  
pp. 212-221 ◽  
Author(s):  
Yuhai Bao ◽  
Qiang Tang ◽  
Xiubin He ◽  
Yunhua Hu ◽  
Xinbao Zhang
Keyword(s):  
Soil Erosion ◽  
Surface Runoff ◽  
Water Wave ◽  
Three Gorges Reservoir ◽  
Riparian Zone ◽  
Water Levels ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Wave Erosion

The riparian zone of the Three Gorges Reservoir (TGR) has experienced substantial erosion that may severely deteriorate the reservoir ecosystem. To calculate soil erosion characteristics, field investigations have been conducted in the TGR area and 12 erosion-monitoring transects have been set in the middle TGR. The results showed that the dominating drive forces are water wave, gravity and surface runoff. In summer when the reservoir ran at lower water levels, wave erosion led to bank instability and bank collapses. Simultaneously, due to a number of heavy storms, surface runoff erosion was also severe. In other seasons when the reservoir ran at relative higher levels reaching the highest level in winter, water wave prevailed due to the wide range of water surface and heavy waterway transportation. Soil erosion was the most severe in the mainstream where higher frequency and intensity of waves occurred. The rates of wave erosion were around 37 mm/year with the highest being 53 mm/year, and surface runoff erosion was up to 15 mm/year in the main stream riparian zone.

Analysis of lengths, water areas and volumes of the Three Gorges Reservoir at different water levels using Landsat images and SRTM DEM data

2013 ◽  
Vol 304 ◽  
pp. 115-125 ◽  
Author(s):  
Xianwei Wang ◽  
Yan Chen ◽  
Lianchun Song ◽  
Xianyan Chen ◽  
Hongjie Xie ◽  
...  
Keyword(s):  
Three Gorges Reservoir ◽  
Water Levels ◽  
Three Gorges ◽  
Srtm Dem ◽  
Landsat Images ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

Stability Analysis of Accumulation Landslides in the Three Gorges Reservoir Area Under Reservoir Water Level Fluctuation Based on Multi-Circular Model

2021 ◽  
Author(s):  
Zhiqiang Fan ◽  
Yanhao Zheng
Keyword(s):  
Stability Analysis ◽  
Water Level ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Landslide Stability ◽  
Slip Surfaces ◽  
The Three Gorges ◽  
The Stability

Abstract In the Three Gorges Reservoir (TGR) area, the accumulation landslide characterized by stepped slip surfaces is widely developed, and its stability is significantly affected by the fluctuation of reservoir water level. In this paper, the Shuping landslide, a typical accumulation landslide in the TGR area, was selected to study the effect of water level fluctuations on landslide stability. Based on Multi-Circular (M-C) model, it is found that the decline of reservoir water level was the dominant factor causing the decrease of landslide stability. At the end of the decline of reservoir water level, the landslide stability was minimum and the corresponding moment was the most dangerous. The effect of the drawdown speed of reservoir water level on the minimum value of landslide stability had a threshold effect, although the minimum stability coefficient of landslide decreased with the increase of drawdown speed. Under the most dangerous water level conditions, the stability of the piled landslide increased linearly with the increase of the net thrust of piles. Also, by comparing with other classical models, the effectiveness of the M-C model in evaluating landslide stability under the dynamic changes of reservoir water level was verified. The results could provide a reliable scientific basis for improving the stability analysis and reinforcement measures of the accumulation landslide with the multi-circular slip surfaces in the TGR area, as well as can be applied to similar landslides in reservoir areas.

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