Research on Sediment Problem in Dam Area of Three Gorges Project

2014 ◽  
Vol 638-640 ◽  
pp. 770-773
Author(s):  
Jun Wang ◽  
Wei Guo ◽  
Hai Tao Xu
Keyword(s):  
Flood Control ◽  
Early Stage ◽  
Three Gorges Project ◽  
Three Gorges ◽  
Sedimentation Pattern ◽  
Control Power ◽  
The Three Gorges ◽  
The Three Gorges Project ◽  
Prototype Observation ◽  
Narrow Section

The Three Gorges Project is the biggest hydraulic engineering and it brings great comprehensive benefits such as flood control, power generation, navigation, and water supply. According to the sedimentation prototype observation on the early stage of the Three Gorges Project operation, the sedimentation pattern of dam area and the upper part of power plant, as well as the channel sedimentation are analyzed after the systematic arrangement of the prototype observation, at the same time, the formation mechanism and development of siltation are studied based on river dynamics theory. The analysis shows that: the early siltation does not have important influence on the operation of the Three Gorges Project, the sedimentation of dam area occurs mainly in the wide section while little siltation in the narrow section and the siltation intensity is greater while the location is close to the dam from the view of the siltation distribution.

scholarly journals Effects of the Three Gorges Project on Runoff and Related Benefits of the Key Regions along Main Branches of the Yangtze River

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 269 ◽  
Author(s):  
Yanjun Gao ◽  
Yongqiang Zhang
Keyword(s):  
Yangtze River ◽  
Flood Control ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Yangtze River ◽  
Annual Fluctuation ◽  
The Core ◽  
The Three Gorges ◽  
Core Areas ◽  
The Three Gorges Project

The Three Gorges Project (TGP) is the largest hydroelectric project in the world. It is crucial to understand the relationship between runoff regime changes and TGP’s full operation after 2009 in the Yangtze River Basin (YRB). This paper defines core, extended and buffer areas of YRB, analyzes the effects of TGP on runoff anomaly (RA), runoff variation (RV) and change of coefficient of variation (CCV) between two periods (2003–2008 and 2009–2016), takes percentage of runoff anomaly (PRA) as the evaluation standard, assures alleviation effect on severe dry and wet years of the research area, and finally summarizes related benefits of flood control from TGP. Our results indicate the inter-annual fluctuation of runoff in the core and extended areas expanded, but reduced in the buffer areas, and the frequencies of severe dry and wet years alleviated in the buffer, core and extended areas. Generally, the extended and core areas become less wet, and the buffer areas become less dry. The RV and CCV are both strengthened in the extended and core areas, but are weakened in the buffer areas, and RV is well positively correlated (R2 = 0.80) to CCV. Furthermore, the main benefits of TGP on flood control are remarkable in the reduction of disaster affected population, the decrease of agricultural disaster-damaged area, and the decline of direct economic loss. However, due to torrentially seasonal and non-seasonal precipitation, the sharp rebounds of three standards for Hubei and Anhui occurred in 2010 and 2016, and the percentage of agricultural damage area of five regions in the core and extended areas did not decline synchronously and performed irregularly. Our results suggest that the five key regions along the main branches of the Yangtze River should establish a flood control system and promote the connectivity of infrastructures at different levels to meet the significant functions of TGP. It is a great challenge for TGP operation to balance the benefits and conflicts among flood control, power generation and water resources supply in the future.

In Situ Tests on Creep Behavior of Rock Mass with Joint or Shearing Zone in Foundation of Large-Scale Hydroelectric Projects

2004 ◽  
Vol 261-263 ◽  
pp. 1097-1102 ◽  
Author(s):  
Jian Liu ◽  
Xia Ting Feng ◽  
Xiu Li Ding ◽  
Huo Ming Zhou
Keyword(s):  
Rock Mass ◽  
Creep Behavior ◽  
Large Scale ◽  
Time Dependent ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
The Three Gorges Project

The time-dependent behavior of rock mass, which is generally governed by joints and shearing zones, is of great significance for engineering design and prediction of long-term deformation and stability. In situ creep test is a more effective method than laboratory test in characterizing the creep behavior of rock mass with joint or shearing zone due to the complexity of field conditions. A series of in situ creep tests on granite with joint at the shiplock area of the Three-Gorges Project and basalt with shearing zone at the right abutment of the Xiluodu Project were performed in this study. Based on the test results, the stress-displacement-time responses of the joints and basalt are analyzed, and their time-dependent constitutive model and model coefficients are given, which is crucial for the design to prevent the creep deformations of rock masses from causing the failure of the operation of the shiplock gate at the Three-Gorges Project and long-term stability of the Xiluodu arc dam.

scholarly journals How the Three Gorges Project (TGP) affects local precipitation

2021 ◽  
Author(s):  
Qin Li ◽  
Yulong Zhong ◽  
Xiuguo Liu ◽  
Mengmeng Wang ◽  
Manxing Shi
Keyword(s):  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
The Three Gorges Project

scholarly journals Seismic hazard assessment of the Three Gorges Project

2013 ◽  
Vol 4 (2) ◽  
pp. 53-60 ◽  
Author(s):  
Yao Yunsheng ◽  
Wang Qiuliang ◽  
Li Jinggang ◽  
Shen Xueling ◽  
Kong Yuyang
Keyword(s):  
Seismic Hazard ◽  
Hazard Assessment ◽  
Seismic Hazard Assessment ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
The Three Gorges Project
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