The influence of hydraulic characteristics on algal bloom in Three Gorges Reservoir, China: A combination of cultural experiments and field monitoring

2022 ◽  
pp. 118030
Author(s):  
Zhengjian Yang ◽  
Chenyu Wei ◽  
Defu Liu ◽  
Qicai Lin ◽  
Yuling Huang ◽  
...  
Keyword(s):  
Three Gorges Reservoir ◽  
Algal Bloom ◽  
Field Monitoring ◽  
Three Gorges ◽  
Hydraulic Characteristics

Diel migration of Microcystis during an algal bloom event in the Three Gorges Reservoir, China

2016 ◽  
Vol 75 (7) ◽  
Author(s):  
Yu-Jie Cui ◽  
De-Fu Liu ◽  
Jia-lei Zhang ◽  
Zheng-Jian Yang ◽  
Soon-Thiam Khu ◽  
...  
Keyword(s):  
Three Gorges Reservoir ◽  
Algal Bloom ◽  
Three Gorges ◽  
Diel Migration ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

The Influence of Hydrodynamic Conditions on Algal Bloom in the Three Gorges Reservoir Tributaries

2013 ◽  
Vol 295-298 ◽  
pp. 1981-1990 ◽  
Author(s):  
Chao Jun Xiong ◽  
De Fu Liu ◽  
Bing Hui Zheng ◽  
Jia Lei Zhang ◽  
Nian San Hu ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Yangtze River ◽  
Three Gorges Reservoir ◽  
Algal Bloom ◽  
General Situation ◽  
Main Stream ◽  
Three Gorges ◽  
Hydrodynamic Conditions ◽  
The Three Gorges Reservoir ◽  
The Three Gorges

Water level has risen considerably since the impounding of Three-Gorges Reservoir in year 2003 and that might broaden and deepen the Yangtze River and the tributary of Three Gorge, will greatly slowdown the flow velocity to change hydrodynamic conditions. This changes Influence the Water Environment of Yangtze River and the tributary of Three Gorges Reservoir, especially eutrophication and algal bloom of the tributaries in Three Gorges Reservoir in recent years. For studying the course of algal bloom in the tributaries of Three Gorges Reservoir and the comprehensive prevention countermeasures, about the hydrodynamics of Yangtze River main stream and tributary in Three Gorges Reservoir must be carefully researched. In this article, general situation of the algal bloom of the tributaries in Three Gorges Reservoir were presented, and analysed on characteristics and influencing factors of breakout of algal bloom from certain self-conditions changes before and after impoundment of the Three Gorges reservoir, knowing that lower the nutrient input and improve water flow regime and flow velocity behaviors are the main measures of comprehensive prevention countermeasures of algal bloom in the tributaries of Three Gorges Reservoir; This research status of influence mechanism of hydrodynamic conditions on algal bloom and the research tendency of the tributaries’ hydrodynamic conditions on algal bloom in Three Gorges Reservoir were reviewed, which provided certain theory reference for study and prevention countermeasures of algal bloom in the Three Gorges Reservoir tributaries.

Preliminary Research on Hydrodynamic Dispatch Method of Algal Blooms in Three Gorges Reservoir Bays

2014 ◽  
Vol 675-677 ◽  
pp. 811-817 ◽  
Author(s):  
Wei Yin ◽  
Xiao Kang Xin ◽  
Hai Yan Jia
Keyword(s):  
Algal Blooms ◽  
Three Gorges Reservoir ◽  
Algal Bloom ◽  
Control Method ◽  
River Mouth ◽  
Three Gorges ◽  
Water Level Change ◽  
Level Change ◽  
Xiangxi River ◽  
Preliminary Research

Spring algal happened in the bays area frequently after Three Gorges Reservoir’s impoundment. Algal bloom is closely related with nutrients, light, temperature and flow velocity. This paper carried out preliminary research on algal blooms hydrodynamic control method by optimizing reservoirs dispatch on main and tributary channels. Making use of software MIKE 21, a Xiangxi River-Three Gorges Reservoir integrate hydrodynamic numerical model has been established, and a series of conditions have been simulated and studied. The result shows that if Three Gorges Reservoir operates alone, velocity at Xiangxi River mouth is less than 0.05m/s, and if Xiangxi Reservoir operates alone, velocity at Xiangxi River mouth is larger than 0.05m/s in wet year. It implies that Three Gorges Reservoir’s water level change has little to do with improvement of tributaries’ velocity, but reservoir in main and tributary channels dispatch together can improve the velocity obviously, which can control algal bloom in tributary bays.

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