Analysis on the Impact of Different Impoundment Schemes of the Three Gorges Project on the Water Level in the Middle and Lower Reaches During the Impoundment Period

2021 ◽  
Author(s):  
Zhongbo Zhang ◽  
Dongdong Zhang ◽  
Simin Geng ◽  
Shuanghu Zhang ◽  
Xiaoyan He ◽  
...  
Keyword(s):  
Water Level ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
The Three Gorges Project ◽  
The Impact

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.

Experimental study on the effect of the Three Gorges Project on water level in Lake Poyang

2014 ◽  
Vol 26 (4) ◽  
pp. 522-528 ◽  
Author(s):  
WU Nianhua ◽  
◽  
LUO You ◽  
LIU Tonghuan ◽  
HUANG Zhiwen
Keyword(s):  
Experimental Study ◽  
Water Level ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
Lake Poyang ◽  
The Three Gorges Project

scholarly journals Suitable ecological water level of the East Lake Dongting after the Three Gorges Project operation

2020 ◽  
Vol 32 (2) ◽  
pp. 417-427
Author(s):  
HUANG Yuyun ◽  
◽  
YU Minghui ◽  
LU Jing ◽  
SUN Zhaohua ◽  
...  
Keyword(s):  
Water Level ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
East Lake ◽  
The Three Gorges Project ◽  
Ecological Water Level ◽  
The East Lake

Small mammal communities on beaches and lakeside farmland in the Poyang Lake region after the Three-Gorges Project

Mammalia ◽  
2018 ◽  
Vol 82 (5) ◽  
pp. 438-448 ◽  
Author(s):  
Nianhua Dai ◽  
Ping Lu ◽  
Meiwen Zhang ◽  
Guohua Zhang ◽  
Chen Zhang ◽  
...  
Keyword(s):  
Small Mammal ◽  
Dominant Species ◽  
Poyang Lake ◽  
Three Gorges Project ◽  
Three Gorges ◽  
The Three Gorges ◽  
Small Mammal Community ◽  
The Three Gorges Project ◽  
Mammal Community ◽  
The Impact

AbstractStudies around Dongting Lake have indicated that the Three Gorges Project (TGP) has had a large effect on the structure of the small mammal community; however, few studies have analyzed this around Poyang Lake. To understand the status of the small mammal community around Poyang Lake, the lakeside farmland and beaches were surveyed in 2015 and 2016. The results showed the overall trap success was 10.12% on farmland and 5.47% on lake beaches, with five species of Rodentia and one species of Soricomorpha. The density of the small mammal was high, especially in rice fields.Apodemus agrariusandRattus loseawere the dominant species, representing 49.59% and 47.68% of the species composition on farmland. The dominant species on the beach area wereA. agrarius(66.01%) andR. losea(28.76%). The species abundance and diversity indexes of the small mammal community on beaches were similar to those on farmland. The widespread presence ofA. agrarius,R. losea, andRattus norvegicuson the beaches indicates the farmland community had migrated to the beach area. In conclusion, it is important to elucidate the succession of the small mammal community inhabiting the lake beaches in downstream areas to quantify the impact of the TGP.

Influence of the Three Gorges Project on Water Level in the Middle Reaches of Yangtze River, China

2014 ◽  
Vol 934 ◽  
pp. 279-284 ◽  
Author(s):  
Liu Zhi Jiang ◽  
Xue Lei Wang ◽  
Xuan Ban
Keyword(s):  
Water Level ◽  
Yangtze River ◽  
Three Gorges Project ◽  
Three Gorges ◽  
Hydrologic Alteration ◽  
The Three Gorges ◽  
Range Of Variability Approach ◽  
Daily Water ◽  
The Three Gorges Project ◽  
Low Degrees

The alterations of the water level in the middle reaches of Yangtze River were investigated using the range of variability approach based on daily water level datasets extracted from 5hydrological stations.Results show that the operation of the Three Gorges Dam disturbed the hydrologic regime downstream and directly affected the water level to some extent. The rate and frequency of water level changes was most altered, while the timing of annual extreme water level was least affected. For the overall degrees of hydrologic alteration, high degrees were identified in Yichang (56%) and Jianli (47%) reaches; moderate degrees in Hankou (45%) reaches; and low degrees in Chenglingji (37%) and Luoshan (40%) reaches. Water level alterations in the middle reaches of Yangtze River were mainly caused by human activitiessuch as dam construction in the upstream and in-channel sand dredging, and also natural hydrological processes.

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