Study on Floating Water Level During Flood Season of the Three Gorges

2020 ◽  
pp. 205-233
Author(s):  
Shouren Zheng ◽  
Zhiyu Zhong ◽  
Qiang Zou ◽  
Yi Ding ◽  
Lin Yang ◽  
...  
Keyword(s):  
Water Level ◽  
Three Gorges ◽  
Flood Season ◽  
The Three Gorges

The Riverbed Evolution and its Influence on Channel in Tunaozi Reach after Three Gorges Water Storage

2012 ◽  
Vol 226-228 ◽  
pp. 2323-2327
Author(s):  
Hua Fu ◽  
Xu He ◽  
Yao Chang Ma ◽  
Yun Yun Yang
Keyword(s):  
Water Level ◽  
Longitudinal Section ◽  
Three Gorges Project ◽  
Three Gorges ◽  
Channel Condition ◽  
Flood Season ◽  
The Three Gorges ◽  
Smooth Channel ◽  
Before And After ◽  
The Three Gorges Project

Tunaozi reach is one of the three famous sediment depositing reach on the Sichuan section of Yangtze River. It’s on the fluctuation backwater area when the Three Gorges Project is operated at the level of 135 m. According to the measured data before and after impoundment, this paper analyzes and calculates the sediment of the reach, and discusses the variation of silting and scouring of the reach after impoundment. Thus, this paper will have a study on the reason that silting and scouring lead to channel condition change. The result as follow: after impoundment, the bank-up water level of the reach has been head up 2 m during the flood season, sediment deposition becomes heavier than before impoundment; in post-flood season, the water level is 139m in November, it has been head up 7 m, compared with low water level in natural, current slowly flow further, the silt lack of enough scour in flood season, it leads to cumulative deposition. Until December 2005, thalweg plane position move left 200 m after impoundment. The maximum silting height of the thalweg longitudinal section is 30 m. The prime channel has been basically silted flat, year. Since the Three Gorges reservoir began to store water for three years, in low water level periods, ship tank is out of shallow, some timely dredging measure should be taken and make sure the smooth channel.

Analysis of the Three Gorges Reservoir Operation on the Water Level of Yangtze River during the Non-Flood Season

2013 ◽  
Vol 864-867 ◽  
pp. 2207-2212 ◽  
Author(s):  
Jing Zheng
Keyword(s):  
Water Level ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Water Levels ◽  
Three Gorges ◽  
The Yangtze River ◽  
The Three Gorges Reservoir ◽  
Flood Season ◽  
The Three Gorges ◽  
Downstream Area

In the middle and downstream area of the Yangtze River, low water levels had occurred at post-flood season or before the flood season in recent years, since the trial impoundment of the Three Gorges Reservoir (TGR) in 2008. Based on the analysis of the low water levels, both rating curve of main stations in the middle and lower reaches of the Yangtze River and the operation of TGR in the dry season were analyzed in study to reveal the effects of the impoundment of TGR on water level of downstream areas. The research results show that the water supplement of the TGR could raise the downstream water level, which has positive effect on water supplement and navigation in this area.

Effects of seasonal water-level fluctuation on soil pore structure in the Three Gorges Reservoir, China

2018 ◽  
Vol 15 (10) ◽  
pp. 2192-2206 ◽  
Author(s):  
Shu-juan Zhang ◽  
Qiang Tang ◽  
Yu-hai Bao ◽  
Xiu-bin He ◽  
Feng-xia Tian ◽  
...  
Keyword(s):  
Pore Structure ◽  
Water Level ◽  
Three Gorges Reservoir ◽  
Water Level Fluctuation ◽  
Level Fluctuation ◽  
Three Gorges ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

scholarly journals Precipitation Changes in the Three Gorges Reservoir Area and the Relationship with Water Level Change

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6110
Author(s):  
Qin Li ◽  
Xiuguo Liu ◽  
Yulong Zhong ◽  
Mengmeng Wang ◽  
Manxing Shi
Keyword(s):  
Water Level ◽  
Three Gorges Reservoir ◽  
Precipitation Anomaly ◽  
Three Gorges Reservoir Area ◽  
Three Gorges ◽  
Reservoir Area ◽  
Precipitation Concentration ◽  
The Three Gorges ◽  
Before And After ◽  
Precipitation Changes

As the largest hydroelectric project worldwide, previous studies indicate that the Three Gorges Dam (TGD) affects the local climate because of the changes of hydrological cycle caused by the impounding and draining of the TGD. However, previous studies do not analyze the long-term precipitation changes before and after the impoundment, and the variation characteristics of local precipitation remain elusive. In this study, we use precipitation anomaly data derived from the CN05.1 precipitation dataset between 1988 and 2017 to trace the changes of precipitation before and after the construction of the TGD (i.e., 1988–2002 and 2003–2017), in the Three Gorges Reservoir Area (TGRA). Results showed that the annual and dry season precipitation anomaly in the TGRA presented an increasing trend, and the precipitation anomaly showed a slight decrease during the flood season. After the impoundment of TGD, the precipitation concentration degree in the TGRA decreased, indicating that the precipitation became increasingly uniform, and the precipitation concentration period insignificantly increased. A resonance phenomenon between the monthly average water level and precipitation anomaly occurred in the TGRA after 2011 and showed a positive correlation. Our findings revealed the change of local precipitation characteristics before and after the impoundment of TGD and showed strong evidence that this change had a close relationship with the water level.

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