scholarly journals The assessment of food organism resources and trophic states of Danjiangkou Reservoir

1997 ◽  
Vol 9 (1) ◽  
pp. 57-62
Author(s):  
Han Deju ◽  
◽  
Pen Jianhua ◽  
Jian Dong ◽  
Zhou Qin ◽  
...  
Keyword(s):  
Danjiangkou Reservoir ◽  
Food Organism

Comprehensive Assessment of Danjiangkou Reservoir Ecosystem Health

2012 ◽  
Vol 18 (1) ◽  
pp. 86
Author(s):  
Hongye ZHANG ◽  
Qinghua CAI ◽  
Linghui KONG ◽  
Yaoyang XU ◽  
Min ZHANG ◽  
...  
Keyword(s):  
Ecosystem Health ◽  
Comprehensive Assessment ◽  
Danjiangkou Reservoir

scholarly journals Spatio-temporal variation in phytoplankton community and its influencing factors in Danjiangkou Reservoir

2016 ◽  
Vol 28 (5) ◽  
pp. 1057-1065
Author(s):  
WANG Yinghua ◽  
◽  
CHEN Lei ◽  
NIU Yuan ◽  
YU Hui ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Influencing Factors ◽  
Phytoplankton Community ◽  
Danjiangkou Reservoir ◽  
Spatio Temporal

Fishery Resources, Environment, and Conservation in the Mississippi and Yangtze (Changjiang) River Basins

2016 ◽  
Keyword(s):  
Time Management ◽  
Management Strategies ◽  
Water Diversion ◽  
Conservation Strategies ◽  
Fish Farms ◽  
Danjiangkou Reservoir ◽  
Fisheries Resources ◽  
Fisheries Sustainability ◽  
Hanjiang River ◽  
Major Carps

<em>Abstract</em>.—The Hanjiang River is the largest tributary of the Yangtze River and contains Danjiangkou Dam, which forms Danjiangkou Reservoir in the middle and upper reaches of the river. During the past 50 years, fisheries resources have changed significantly in the middle and lower Hanjiang River and in Danjiangkou Reservoir. Spawning grounds for major carps and other commercially important fishes have disappeared. Downstream of Danjiangkou Dam, total egg quantity spawned by major carps and other commercially im portant fishes have decreased while similar measures from small-bodied fishes have increased. Important commercial fishes have experienced delayed spawning times and decreased growth. Overall catches of commercial fishes have decreased downstream of the dam, though increased upstream. Some exotic fishes captured in the Danjiangkou Reservoir were likely escapees from cage-culture fish farms in the reservoir or from land-based fish farms around the reservoir. Changes in fisheries resources were presumed related to reservoir management strategies, which produced a narrower range of year-round water temperatures and caused decreases in seasonal water flow variation downstream, overfishing, and eutrophication in the reservoir. To implement a national water diversion policy in central China, the height of the Danjiangkou Dam was increased 15 m in 2012, which significantly increased the impoundment area of the Danjiangkou Reservoir at the end of 2014. Further changes in fisheries resources can be expected in the future. At the present time, management and conservation strategies for fisheries resources need to be developed to ensure future fisheries sustainability for both the Hanjiang River and the Danjiangkou Reservoir.

Illumina MiSeq sequencing and network analysis the distribution and co-occurrence of bacterioplankton in Danjiangkou Reservoir, China

2020 ◽  
Vol 202 (4) ◽  
pp. 859-873 ◽  
Author(s):  
Zhao-Jin Chen ◽  
Ge Xu ◽  
Chuan-Yu Ding ◽  
Bao-Hai Zheng ◽  
Yan Chen ◽  
...  
Keyword(s):  
Network Analysis ◽  
Illumina Miseq ◽  
Illumina Miseq Sequencing ◽  
Miseq Sequencing ◽  
Danjiangkou Reservoir

scholarly journals Three-dimensional hydrodynamics numerical of wind-driven circulations in Danjiangkou Reservoir

2018 ◽  
Vol 246 ◽  
pp. 02021
Author(s):  
Jie Zhu ◽  
Jin Quan ◽  
Xiaohui Lei ◽  
Xia Yue ◽  
Yang Duan
Keyword(s):  
Wind Speed ◽  
Flow Field ◽  
Potential Flow ◽  
Flow Direction ◽  
Three Dimensional ◽  
Surface Flow ◽  
Surface Velocity ◽  
Wind Condition ◽  
Reservoir Area ◽  
Danjiangkou Reservoir

This paper focuses on the analysis of the flow field of Danjiangkou Reservoir under the action of wind stress. Based on the analysis of the annual wind field data of Danjiangkou Reservoir, the three-dimensional hydrodynamic model of Danjiangkou Reservoir was established. The distribution of water flow field in the reservoir area under five different wind directions and two different wind speeds was studied. The simulation results were compared with the flow field without wind. The results show that when the wind speed in the reservoir area is 3.3m/s, the surface velocity and flow direction change less under the same wind conditions as the potential flow direction. Under the wind condition opposite to the potential flow direction, the reservoir area is locally generated. The small circulation and surface flow are more disordered; when the wind speed reaches 10.0m/s, under the same wind condition as the potential flow direction, the surface velocity of the reservoir area increases significantly. Under the wind condition opposite to the direction of the potential flow, a stable counterclockwise circulation is generated, and the wind direction dominates the surface layer. seriously affecting the flow field distribution in the reservoir area. The research results in this paper can provide support for the reservoir in the formulation of emergency water pollution emergency strategy and the formulation of real-time scheduling plan.

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