Assessment of hydrologic alteration induced by the Three Gorges Dam in Dongting Lake, China

2018 ◽  
Vol 34 (7) ◽  
pp. 686-696 ◽  
Author(s):  
Junxiang Cheng ◽  
Ligang Xu ◽  
Xiaolong Wang ◽  
Jiahu Jiang ◽  
Hailin You
Keyword(s):  
Dongting Lake ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
Hydrologic Alteration ◽  
The Three Gorges ◽  
The Three Gorges Dam

Metal Flux is Changing in Dongting Lake Due to the Operation of the Three Gorges Dam, China

2021 ◽  
Author(s):  
wenzhong tang ◽  
Limin Shu ◽  
Jack c. Ng ◽  
Yu Zhao ◽  
Hui Lin ◽  
...  
Keyword(s):  
Dongting Lake ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
The Three Gorges ◽  
Metal Flux ◽  
The Three Gorges Dam

scholarly journals Quantifying the effects of channel change on the discharge diversion of Jingjiang Three Outlets after the operation of the Three Gorges Dam

2016 ◽  
Vol 47 (S1) ◽  
pp. 161-174 ◽  
Author(s):  
Yanyan Li ◽  
Guishan Yang ◽  
Bing Li ◽  
Rongrong Wan ◽  
Weili Duan ◽  
...  
Keyword(s):  
Water Level ◽  
Yangtze River ◽  
Flood Control ◽  
Dongting Lake ◽  
Three Gorges Dam ◽  
Three Gorges ◽  
Channel Change ◽  
Channel Changes ◽  
The Three Gorges ◽  
The Three Gorges Dam

The Jingjiang Three Outlets (JTO) are the water-sediment connecting channels between the Yangtze River and the Dongting Lake. The discharge diversion of the JTO plays a dominant role in the flood control of the middle–lower Yangtze River, Dongting Lake evolution, and ecological environment. After the operation of the Three Gorges Dam (TGD), the river channels downstream experienced dramatic channel changes. To study the influences of the channel change on the discharge diversion, the authors analyzed the channel changes by water level–discharge rating curves and cross-sectional channel profiles in 1980–2014. Hence, changes in the water level with the same discharge and the decline of discharge diversion at the JTO were noted. Channel incision caused the water level with the same discharge to greatly decrease in the upper Jingjiang River. The water level with the same discharge significantly increased at the JTO as a result of the channel deposition. The channel changes contributed approximately 37.74% and 76.36%, respectively, to the amount and ratio of discharge diversion decreases after the TGD operation. The channel changes serve as the primary factor in facilitating the decrease in the discharge diversion ratio, but not the main factor for the decreased amount of the discharge diversion.

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