Effects of Water Temperature and Discharge on Natural Reproduction Time of the Chinese Sturgeon,Acipenser sinensis, in the Yangtze River, China and Impacts of the Impoundment of the Three Gorges Reservoir

2014 ◽  
Vol 31 (5) ◽  
pp. 274-278 ◽  
Author(s):  
Xin Gao ◽  
Pengcheng Lin ◽  
Mingzheng Li ◽  
Zhonghua Duan ◽  
Huanzhang Liu
Keyword(s):  
Water Temperature ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Yangtze River ◽  
Chinese Sturgeon ◽  
Acipenser Sinensis ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Natural Reproduction

Analysis on impacts of the Three Gorges Reservoir on water temperature in the middle reach of the Yangtze River

2021 ◽  
Author(s):  
Yuwei Tao ◽  
Yuankun Wang ◽  
Dong Wang
Keyword(s):  
Water Temperature ◽  
Temperature Regime ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Yangtze River ◽  
Middle Reach ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
The Impact

<p>Water temperature, a crucial environmental factor, has a direct impact on almost all ecological and biogeochemical processes. The hydrological and thermal regimes in the Yangtze River have changed greatly due to the constructions of the Three Gorges Reservoir (TGR). To quantify the impact of TGR on the water temperature regime, we present a regression-modeling framework to reconstruct the temporal pattern of flow and temperature variation along the middle reach of the river in the absence of the TGR. By comparing reconstructed water temperatures to observed water temperature for the post-impounded period, the influence of impoundment on water temperature was estimated. Results show that TGR has had a greater impact on water temperature than natural changes in air temperature and discharge. The reservoir acts as a source of cold water in spring, summer and autumn and a warm source in winter. The results of this study illustrate the pronounced effect of the TGR on the temperature regime of the Yangtze River. We hope this study could provide a scientific reference for ecological operation of TGR facing biological conservation.</p><p>Note: This study has been published in Journal of Hydrology (Tao, Y., Wang, Y., Rhoads, B., Wang, D., Ni, L. and Wu, J., 2020. Quantifying the impacts of the Three Gorges Reservoir on water temperature in the middle reach of the Yangtze River. Journal of Hydrology. 582.).</p>

Regulation of Laijiapu Waterway in Jingjiang Reach

2014 ◽  
Vol 501-504 ◽  
pp. 2001-2006
Author(s):  
Ya Liu ◽  
Li Zheng ◽  
Cheng Tao Huang ◽  
Zhao Biao Huang ◽  
Lin Liu
Keyword(s):  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Three Gorges ◽  
The Yangtze River ◽  
Point Bar ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Before And After ◽  
The Stability ◽  
Channel Bar

After impoundment of the Three Gorges Reservoir, Jingjiang reach, in the middle of the Yangtze River, has gradually shown a series of atypical fluvial features, adversely affecting the maintenance of waterways. Citing the Laijiapu Waterway, a meandering segment in the lower Jingjiang for example, this paper compared the fluvial features of the channel before and after the impoundment, summed up its navigation-obstructing features, and proposed guarding the point bar on the convex bank and channel bar in the widening section as a key to maintaining the stability of the navigation channels.

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