Volume 12 Issue 2
Mar.  2022
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Article Navigation >  Journal of Environmental Engineering Technology  > 2022  >  12(2): 426-435
ZENG Y H,SHEN X Z,ZHANG J L,et al.Effects of stratified density flow on the spatial distribution of chlorophyll-a in phytoplankton in Xiangxi River[J].Journal of Environmental Engineering Technology，2022，12（2）：426-435 doi: 10.12153/j.issn.1674-991X.20210808
Citation: ZENG Y H,SHEN X Z,ZHANG J L,et al.Effects of stratified density flow on the spatial distribution of chlorophyll-a in phytoplankton in Xiangxi River[J].Journal of Environmental Engineering Technology，2022，12（2）：426-435 doi: 10.12153/j.issn.1674-991X.20210808
shu

Effects of stratified density flow on the spatial distribution of chlorophyll-a in phytoplankton in Xiangxi River

doi: 10.12153/j.issn.1674-991X.20210808
  • 1.

    College of Civil and Environmental, Hubei University of Technology

  • 2.

    Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province

  • Received Date: 2021-12-08
    Available Online: 2022-04-02
    Abstract
  • The spatial distribution characteristics of chlorophyll-a (Chla) in phytoplankton in the Xiangxi River during the flood season and their relevant affecting factors were analyzed by applying mathematical statistics methods and based on the monitoring data of hydrodynamics, meteorology and the drifting of the algae in Xiangxi River reservoir of the Three Gorges Reservoir during the flood season (August 4-10, 2017). The process of horizontal transport and vertical mixing of algae under the background of stratified density flow was explored. The results showed that: 1) The hydrodynamic data of Xiangxi River reservoir was featured with the obvious density-stratified flow. Reynolds numbers during the monitoring period were all above 4 000, and the water body got into the turbulent state, which produced two effects on the movement of the algae, i.e. horizontal movement and vertical mixing. 2) The horizontal drift velocities of the algae on the water surface was affected by wind speeds and water velocities with the response formula Valgae=0.035Vwind+0.461Vwater+0.034 (R2=0.917, P<0.01). 3) The dilution effect of density-stratified flow on the raw water of high-concentration of algal cells in the reservoir and the carrying effect of circulations on high-concentration algal cells led to a linear downward trend of the total Chla concentrations of the water column. Meanwhile, the mainstream poured back into the reservoir at the upper and middle layers, and the upstream inflow flowed to the river mouth in the form of density current at the bottom along the slopes. The two flows met in the middle and upper sections of the river and thus a circulation was formed, and the pouring-back flow was divided into two parts in the middle of the reservoir, which were respectively discharged from the surface and the bottom. Chla concentrations presented such a sequence: surface > bottom > middle. When the circulation was formed as a result of the clash between the flow poured back and the raw water of the reservoir and discharged from the bottom to the reservoir bay, Chla concentrations presented this sequence: surface > middle > bottom, or middle > bottom > surface. The results suggested that the wind speeds and water horizontal velocities of density flow were key factors for the horizontal distribution of Chla, while the vertical distribution was affected by the water circulation mode formed by density flow.

     

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    • References(39)
  • [1]
    长江三峡工程生态与环境监测公报[R]. 北京: 中国环境监测总站, 2015.
    [2]
    DAI H C, ZHENG T G, LIU D F. Effects of reservoir impounding on key ecological factors in the Three Gorges Region[J]. Procedia Environmental Sciences,2010,2:15-24. doi: 10.1016/j.proenv.2010.10.004
    [3]
    LIU L, LIU D F, JOHNSON D M, et al. Effects of vertical mixing on phytoplankton blooms in Xiangxi Bay of Three Gorges Reservoir: implications for management[J]. Water Research,2012,46(7):2121-2130. doi: 10.1016/j.watres.2012.01.029
    [4]
    张远, 郑丙辉, 刘鸿亮, 等.三峡水库蓄水后氮、磷营养盐的特征分析[J]. 水资源保护,2005,21(6):23-26. doi: 10.3969/j.issn.1004-6933.2005.06.006

    ZHANG Y, ZHENG B H, LIU H L, et al. Characters of nitrogen and phosphorus of the Three Gorges Reservoir after impounding[J]. Water Resources Protection,2005,21(6):23-26. doi: 10.3969/j.issn.1004-6933.2005.06.006
    [5]
    孔繁翔, 宋立荣. 蓝藻水华形成过程及其环境特征研究[M]. 北京: 科学出版社, 2011: 45-56.
    [6]
    杨正健. 分层异重流背景下三峡水库典型支流水华生消机理及其调控[D]. 武汉: 武汉大学, 2014.
    [7]
    李哲. 三峡水库运行初期小江回水区藻类生境变化与群落演替特征研究[D]. 重庆: 重庆大学, 2009.
    [8]
    王丽平, 郑丙辉, 张佳磊, 等.三峡水库蓄水后对支流大宁河富营养化特征及水动力的影响[J]. 湖泊科学,2012,24(2):232-237. doi: 10.3969/j.issn.1003-5427.2012.02.010

    WANG L P, ZHENG B H, ZHANG J L, et al. Effects on euthrophication and hydrodynamics of Daning River after impoundment of Three Gorges Reservoir[J]. Journal of Lake Sciences,2012,24(2):232-237. doi: 10.3969/j.issn.1003-5427.2012.02.010
    [9]
    高圻烽, 何国建, 方红卫, 等.三峡库区支流中水体的垂向掺混对于藻类生长的影响[J]. 水利学报,2017,48(1):96-103.

    GAO Q F, HE G J, FANG H W, et al. Effects of vertical mixing on algal growth in the tributary of Three Gorges Reservoir[J]. Journal of Hydraulic Engineering,2017,48(1):96-103.
    [10]
    张佳磊, 郑丙辉, 熊超军, 等.三峡大宁河水体光学特征及其对藻类生物量的影响[J]. 环境科学研究,2014,27(5):492-497.

    ZHANG J L, ZHENG B H, XIONG C J, et al. Optical characteristics of Daning River in the Three Gorges Reservoir and its impact on algae biomass[J]. Research of Environmental Sciences,2014,27(5):492-497.
    [11]
    张佳磊, 郑丙辉, 刘德富, 等.三峡水库大宁河支流浮游植物演变过程及其驱动因素[J]. 环境科学,2017,38(2):535-546.

    ZHANG J L, ZHENG B H, LIU D F, et al. Succession pattern of phytoplankton of Daning River in the Three Gorges Reservoir and its driving factors[J]. Environmental Science,2017,38(2):535-546.
    [12]
    姚绪姣, 刘德富, 杨正健, 等. 三峡水库香溪河库湾水华高发期浮游植物群落结构分布特征[J]. 四川大学学报(工程科学版), 2012, 44(增刊2): 211-220.

    YAO X J, LIU D F, YANG Z J, et al. Distribution characteristics of phytoplankton community structure in Xiangxi Bay of Three Gorges Reservoir during spring and summer[J]. Journal of Sichuan University (Engineering Science Edition), 2012, 44(Suppl 2): 211-220.
    [13]
    张磊, 蔚建军, 付莉, 等.三峡库区回水区营养盐和叶绿素a的时空变化及其相互关系[J]. 环境科学,2015,36(6):2061-2069.

    ZHANG L, WEI J J, FU L, et al. Temporal and spatial variation of nutrients and chlorophyll a, and their relationship in Pengxi River backwater area, Three Gorges Reservoir[J]. Environmental Science,2015,36(6):2061-2069.
    [14]
    JI D B, WELLS S A, YANG Z J, et al. Impacts of water level rise on algal bloom prevention in the tributary of Three Gorges Reservoir, China[J]. Ecological Engineering,2017,98:70-81. doi: 10.1016/j.ecoleng.2016.10.019
    [15]
    杨敏, 张晟, 胡征宇.三峡水库香溪河库湾蓝藻水华暴发特性及成因探析[J]. 湖泊科学,2014,26(3):371-378. doi: 10.18307/2014.0306

    YANG M, ZHANG S, HU Z Y. Characteristics and preliminary regulating factors of cyanobacterial bloom in Xiangxi Bay of the Three Gorges Reservoir[J]. Journal of Lake Sciences,2014,26(3):371-378. doi: 10.18307/2014.0306
    [16]
    申恒伦, 蔡庆华, 邵美玲, 等.三峡水库香溪河流域梯级水库浮游植物群落结构特征[J]. 湖泊科学,2012,24(2):197-205. doi: 10.3969/j.issn.1003-5427.2012.02.005

    SHEN H L, CAI Q H, SHAO M L, et al. Community structure characteristics of phytoplankton along a cascade of reservoirs in Xiangxi River Basin, Three Gorges Reservior[J]. Journal of Lake Sciences,2012,24(2):197-205. doi: 10.3969/j.issn.1003-5427.2012.02.005
    [17]
    CAO H S, KONG F X, LUO L C, et al. Effects of wind and wind-induced waves on vertical phytoplankton distribution and surface blooms of Microcystis aeruginosa in Lake Taihu[J]. Journal of Freshwater Ecology,2006,21(2):231-238. doi: 10.1080/02705060.2006.9664991
    [18]
    ZHU M Y, PAERL H W, ZHU G W, et al. The role of tropical cyclones in stimulating Cyanobacterial (Microcystis Spp. ) blooms in hypertrophic Lake Taihu, China[J]. Harmful Algae,2014,39:310-321. doi: 10.1016/j.hal.2014.09.003
    [19]
    WEBSTER H. On the distribution of blue-green algae in lakes: wind-tunnel tank experiments[J]. Limnology & Oceanography,1994,39(2):374-382.
    [20]
    HUTCHINSON W. Effect of wind on the distribution of phytoplankton cells in lakes revisited[J]. Limnology and Oceanography,1994,39(2):365-373. doi: 10.4319/lo.1994.39.2.0365
    [21]
    吴挺峰, 朱广伟, 秦伯强, 等.前期风场控制的太湖北部湖湾水动力及对蓝藻水华影响[J]. 湖泊科学,2012,24(3):409-415. doi: 10.3969/j.issn.1003-5427.2012.03.012

    WU T F, ZHU G W, QIN B Q, et al. Prior wind field induced hydrodynamics and its influence on Cyanobacterial bloom in northern bays of Lake Taihu, China[J]. Journal of Lake Sciences,2012,24(3):409-415. doi: 10.3969/j.issn.1003-5427.2012.03.012
    [22]
    邓建才, 刘鑫, 张洪梅, 等.太湖藻类水平漂移特征及其影响因素[J]. 湖泊科学,2014,26(3):358-364. doi: 10.18307/2014.0304

    DENG J C, LIU X, ZHANG H M, et al. Characteristics and impact factors of algal horizontal drifting in Lake Taihu[J]. Journal of Lake Sciences,2014,26(3):358-364. doi: 10.18307/2014.0304
    [23]
    WU T F, QIN B Q, ZHU G W, et al. Dynamics of Cyanobacterial bloom formation during short-term hydrodynamic fluctuation in a large shallow, eutrophic, and wind-exposed Lake Taihu, China[J]. Environmental Science and Pollution Research International,2013,20(12):8546-8556. doi: 10.1007/s11356-013-1812-9
    [24]
    PÉCSELI H L, TRULSEN J K, FIKSEN. Predator-prey encounter and capture rates in turbulent environments[J]. Limnology and Oceanography:Fluids and Environments,2014,4(1):85-105. doi: 10.1215/21573689-2768717
    [25]
    ROTHSCHILD B J, OSBORN T R. Small-scale turbulence and plankton contact rates[J]. Journal of Plankton Research,1988,10(3):465-474. doi: 10.1093/plankt/10.3.465
    [26]
    VISSER A W, STIPS A. Turbulence and zooplankton production: insights from PROVESS[J]. Journal of Sea Research,2002,47(3/4):317-329.
    [27]
    纪道斌, 李国敬, 杨正健, 等.三峡水库支流库湾水流输移水华藻团能力研究[J]. 水电能源科学,2013,31(6):75-77.

    JI D B, LI G J, YANG Z J, et al. Water transport capacity for algal bloom in tributaries of Three Gorges Reservoir[J]. Water Resources and Power,2013,31(6):75-77.
    [28]
    刘德富, 黄钰铃, 纪道斌. 三峡水库支流水华与生态调度[M]. 北京: 中国水利水电出版社, 2013: 182-189.
    [29]
    孔繁翔, 马荣华, 高俊峰, 等.太湖蓝藻水华的预防、预测和预警的理论与实践[J]. 湖泊科学,2009,21(3):314-328. doi: 10.3321/j.issn:1003-5427.2009.03.002

    KONG F X, MA R H, GAO J F, et al. The theory and practice of prevention, forecast and warning on cyanobacteria bloom in Lake Taihu[J]. Journal of Lake Sciences,2009,21(3):314-328. doi: 10.3321/j.issn:1003-5427.2009.03.002
    [30]
    崔玉洁. 三峡水库香溪河藻类生长敏感生态动力学过程及其模拟[D]. 武汉: 武汉大学, 2017.
    [31]
    白晓华, 胡维平, 胡志新, 等.2004年夏季太湖梅梁湾席状漂浮水华风力漂移入湾量计算[J]. 环境科学,2005,26(6):57-60. doi: 10.3321/j.issn:0250-3301.2005.06.011

    BAI X H, HU W P, HU Z X, et al. Importation of wind-driven drift of mat-like algae bloom into Meiliang Bay of Taihu Lake in 2004 summer[J]. Environmental Science,2005,26(6):57-60. doi: 10.3321/j.issn:0250-3301.2005.06.011
    [32]
    杨正健, 刘德富, 纪道斌, 等.防控支流库湾水华的三峡水库潮汐式生态调度可行性研究[J]. 水电能源科学,2015,33(12):48-50.

    YANG Z J, LIU D F, JI D B, et al. Feasibility study on tide-type ecological operation method to control algal bloom in tributaries of Three Gorges Reservoir[J]. Water Resources and Power,2015,33(12):48-50.
    [33]
    REYNOLDS O. An experimental investigation of the circumstances which determine whether the motion of water shall be direct or sinuous, and of the law of resistance in parallel channels[J]. Philosophical Transactions of the Royal Society of London,1883,35:84-99.
    [34]
    纪道斌, 刘德富, 杨正健, 等.三峡水库香溪河库湾水动力特性分析[J]. 中国科学:物理学 力学 天文学,2010,40(1):101-112.

    JI D B, LIU D F, YANG Z J, et al. Hydrodynamic characteristics of Xiangxi Bay in Three Gorges Reservoir[J]. Scientia Sinica (Pysica, Mechanica & Astronomica),2010,40(1):101-112.
    [35]
    HUISMAN J, SHARPLES J, STROOM J M, et al. Changes in turbulent mixing shift competition for light between phytoplankton species[J]. Ecology,2004,85(11):2960-2970. doi: 10.1890/03-0763
    [36]
    VIDAL J, MARCE R, SERRA T, et al. Localized algal blooms induced by river inflows in a canyon type reservoir[J]. Aquatic Sciences,2012,74(2):315-327. doi: 10.1007/s00027-011-0223-6
    [37]
    刘丰. 异重流环境中游动型藻类与水动力耦合机制研究及数值模拟[D]. 北京: 中国水利水电科学研究院, 2018.
    [38]
    王耀耀. 典型气象过程对香溪河库湾近表层水流水温以及水华的影响[D]. 宜昌: 三峡大学, 2020.
    [39]
    朱永春, 蔡启铭.风场对藻类在太湖中迁移影响的动力学研究[J]. 湖泊科学,1997,9(2):152-158. doi: 10.18307/1997.0210

    ZHU Y C, CAI Q M. The dynamic research of the influence of wind field on the migration of algae in Taihu Lake[J]. Journal of Lake Sciences,1997,9(2):152-158. ⊗ doi: 10.18307/1997.0210
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