A review on the mechanism and its controlling methods of the algal blooms in the tributaries of Three Gorges Reservoir

被引：0
作者：
Liu D. [1 ,2 ]
Yang Z. [1 ]
Ji D. [2 ]
Ma J. [1 ]
Cui Y. [3 ]
Song L. [2 ]
机构：
[1] Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Hubei University of Technology, Wuhan
[2] Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang
[3] School of Water Resources & Hydropower Engineering, Wuhan University, Wuhan
来源：
Shuili Xuebao | / 3卷 / 443-454期
关键词：
Bidirectional density currents; Ecological regulation; Mechanism of algal bloom; Nutrients; Three Gorges Reservoir;
D O I：
10.13243/j.cnki.slxb.20151304
中图分类号：
学科分类号：
摘要：
Since the initial impounding of the Three Gorges Reservoir (TGR) in 2003, the problems of algal bloom in some tributaries have been attracting much attention, and many research works have been done by some scientists and research institutes. In this paper, the condition of the water environment and algal blooms is firstly introduced, the hydrodynamics and its effects on the ecosystem are analyzed, research progress of the mechanism of the algal blooms and its controlling method is reviewed, and the future research aspects are discussed. The review of new findings includes that (1) a bidirectional density currents (BDCs) could be a common flow pattern in the tributaries of the TGR, which are caused by the density difference related to the water temperature and the silt concentration, in which water temperature is the dominant factor; (2)under the BDCs, the thermal stratification in the tributary bays present a"double mixolimnion-thermocline" pattern near the estuary and a"half U-shape" pattern near the backwater end, and the nutrients in the tributary bays are mainly from the mainstream through water intrusions; (3)the trigger of the algal blooms depends on the relationship between the mixing depth (Zm) and euphotic depth (Zeu), but not on the flow velocities directly; (4)the tide-type ecological operation method of TGR could effectively control the algal bloom through affecting the stratified density current. The further study should focus on how to predict the algal bloom accurately using some new theory and methods, and to develop a multiple-objective optimal operation of the cascade reservoirs in the whole Yangtze River upstream area. © 2016, China Water Power Press. All right reserved.
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页码：443 / 454
页数：11
相关论文
共 20 条
  • [1] Yang Z., Liu D., Ji D., Et al., Influence of the impounding process of the Three Gorges Reservoir up to water level 172.5 m on water eutrophication in the Xiangxi Bay, Since China Technological Sciences, 53, 4, pp. 1114-1125, (2010)
  • [2] Yang Z., Liu D., Ji D., Et al., An eco-environmental friendly operation: An effective method to mitigate the harmful blooms in the tributary bays of Three Gorges Reservoir, Science China: Technological Sciences, 56, 6, pp. 1458-1470, (2013)
  • [3] Jiang D., Dai H., Liu W., Influence of thermal density flow on hydrodynamics of Xiangxi Bay in Three Georges Reservoir, China, Procedia Environmental Sciences, 10, pp. 1637-1645, (2011)
  • [4] Dai H., Mao J., Jiang D., Et al., Longitudinal hydrodynamic characteristics in reservoir tributary embayments and effects on algal blooms, PLOS ONE, 8, 7, pp. 1-14, (2013)
  • [5] Zheng T., Mao J., Dai H., Et al., Impacts of water release operations on algal blooms in a tributary bay of Three Gorges Reservoir, Science China Technological Sciences, 54, 6, pp. 1588-1598, (2011)
  • [6] Holbach A., Norra S., Wang L., Et al., Three Gorges Reservoir: Density pump amplification of pollutant transport into tributaries, Environmental Science & Technology, 48, 14, pp. 7798-7806, (2014)
  • [7] Xu Y., Cai Q., Han X., Et al., Factors regulating trophic status in a large subtropical reservoir, China, Environmental Monitoring and Assessment, 169, 1, pp. 237-248, (2009)
  • [8] Xu Y., Zhang M., Wang L., Et al., Changes in water types under the regulated mode of water level in Three Gorges Reservoir, China, Quaternary International, 244, pp. 272-279, (2011)
  • [9] Yu Z., Wang L., Factors influencing thermal structure in a tributary bay of Three Gorges Reservoir, Journal of Hydrodynamics, 23, 4, pp. 407-415, (2011)
  • [10] Ye L., Cai Q., Liu R., Et al., The Influence of topography and land use on water quality of Xiangxi River in Three Gorges Reservoir region, Environmental Geology, 58, pp. 937-942, (2009)
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