Geomechanics Study on the Influence of Water Level Variation on Landslide Safety in Three Gorges Reservoir Region

2014 ◽  
Vol 540 ◽  
pp. 181-184
Author(s):  
Dong Fang Tian
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
High Water ◽  
Three Gorges ◽  
Level Variation ◽  
Water Level Variation ◽  
Three Gorges Reservoir Region ◽  
Influence Of Water ◽  
The Impact ◽  
Dangerous Condition

Up concave and linear slices are two basic geometric shapes of the landslides. In this paper, the unsaturated seepage fields of landslides are described by Richards’s equation and the safety of landslides are calculated by the Morgenstern-Prince method. The Influences of water level variation on landslide safety in Three Gorges reservoir region are discussed through two landslides. It indicates that,the impact of buoyancy is significant and related closely to water level change, and the most dangerous condition is stable high water level. To the slide which slice is line, the impact of permeation is significant and related closely to water change too, and the most dangerous condition is at the beginning of reaching the low water level.

scholarly journals The influence of Three Gorges Reservoir high water level on the rainfall runoff

2018 ◽  
Vol 246 ◽  
pp. 01007
Author(s):  
Biqiong Wu ◽  
Wei Zheng ◽  
Xinkai Ren ◽  
Tao Xu ◽  
Xiao Guo
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
Reference Value ◽  
High Water ◽  
Three Gorges ◽  
Rainfall Runoff ◽  
Flood Peak ◽  
High Water Level ◽  
Three Gorges Region ◽  
Unit Hydrographs

After Three Gorges Reservoir building up, the natural river course and the near hillside inside the backwater region are inundated to form a fairly wide man-made lake which affects the hydrological characteristics and floodwater transmission to different degrees. When the reservoir impound to high water level, the conflux time is obviously shortened, the flood-peak discharge increase, and the peak type became sharper. The change of runoff yield and concentration makes the forecast scheme unable to be applied well. Based on the practice of Three Gorges Reservoir operation, the rainfall-runoff characteristics of the backwater region under the condition of high water level are analysed and summarized, then a set of unit hydrographs suitable for rainfall-runoff calculation are recalibrated, which has great reference value for hydrological forecasting of Three Gorges region.

scholarly journals Effects of water level fluctuation on thermal stratification in a typical tributary bay of Three Gorges Reservoir, China

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e6925 ◽  
Author(s):  
Juxiang Jin ◽  
Scott A. Wells ◽  
Defu Liu ◽  
Guolu Yang ◽  
Senlin Zhu ◽  
...  
Keyword(s):  
Water Level ◽  
Thermal Stratification ◽  
Three Gorges Reservoir ◽  
Thermocline Depth ◽  
Three Gorges ◽  
Algae Blooms ◽  
Xiangxi River ◽  
Bottom Depth ◽  
Field Data Analysis ◽  
The Impact

Xiangxi River is a typical tributary of Three Gorges Reservoir (TGR) in China. Based on field observations in 2010, thermal stratification was significant in most months of the year. Through field data analysis and numerical simulations, the seasonal and spatial variation of thermal stratification as related to the impact of the operation of TGR were investigated. Thermal stratification was most pronounced from April to September in the Xiangxi River tributary. Air temperature (AT) and water level (WL) were the two dominant variables impacting thermal stratification. AT affected the surface water temperature promoting the formation of thermal stratification, and high WLs in TGR deepened the thermocline depth and thermocline bottom depth. These results provide a preliminary description of the seasonal variation and spatial distribution of thermal stratification, which is important for better understanding how thermal stratification affects algae blooms in Xiangxi River.

Productive Experiment of Combined Process Treating Sewage of Three Gorges Reservoir Region

2011 ◽  
Vol 90-93 ◽  
pp. 2444-2450
Author(s):  
Xiao Xia Ma ◽  
Lei Huang ◽  
Jing Song Guo
Keyword(s):  
Three Gorges Reservoir ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Domestic Sewage ◽  
Three Gorges ◽  
Removal Rates ◽  
Combined Process ◽  
Effluent Concentration ◽  
Three Gorges Reservoir Region ◽  
The Impact

To investigate the domestic sewage treatment processes fitting for small mountain towns in Three Gorges Reservoir Region, a demonstration project was built to treat domestic sewage which combined with anaerobic hydrolysis, natural water-dropping aeration and improved artificial soil rapid infiltration and was based on the features of large terrain elevation and many barren ravines. Changes of major pollutants were analyzed in the combined process. The impact of temperature and influent loadings on removal rates of pollutants was investigated. The results showed that, the treatment system had a strong resistance to the influent loadings with good removal rates of pollutants. There was a relationship between temperature and the removal rates of chemical oxygen demand, ammonia and total nitrogen in the system, where the removal rate of total phosphorus was not associated with temperature. There was a clear linear relationship between effluent concentration and influent loadings, effluent concentration increased with influent loadings. There were approximate logarithmic relationships between removal loadings per unit area and influent loadings.

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