三峡水库香溪河库湾夏季蓝藻水华成因研究  

Cyanobacterial bloom in Xiangxi Bay,Three Gorges Reservoir

作　　者：田泽斌[1] 刘德富[1,2] 杨正健[1,3] 方小凤[1] 姚绪姣[1] 方丽娟[1] 

机构地区：[1]三峡大学水利与环境学院,三峡库区生态环境教育部工程研究中心,湖北宜昌443002 [2]湖北工业大学资源与环境学院,湖北武汉430072 [3]武汉大学水利水电学院,湖北武汉430072

出　　处：《中国环境科学》2012年第11期2083-2089,共7页China Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07104-001;2009ZX07104-004;2009ZX07104-003-03);"十一五"国家科技支撑计划(2008BAB29B09)

摘　　要：为探讨香溪河夏季蓝藻水华发生过程及主要影响因素,于2010年7月19日~8月30日在蓝藻水华暴发区域开展持续监测,并对水华过程进行分析.结果表明,水华持续25d,自7月23日暴发,8月16日逐渐消退,藻密度最高达到108.03 106cells/L,优势藻种为鱼腥藻（Anabaena）;自身悬浮机制、固氮机制、能够产生藻毒素抑制其他藻类生长,是鱼腥藻成为优势藻种的主要原因;充足的营养物质、显著的水体分层是水华暴发的必要条件,水华期间蓝藻对硝氮利用显著;在具备充足的营养盐的稳定水体中,水温持续升高、混合层与真光层比值的降低是诱发蓝藻水华的关键因子,并且在混合层与真光层比值为0.5时对蓝藻增殖影响最大.A cyanobacteria bloom was observed in Xiangxi Bay of Three Gorges Reservoir in summer of 2010.Based on field data collected from 19 July to 30 August 2010,this paper descripted the cyanobacteria bloom process and analyzed the influence factors.The bloom lasting for about 25 days,broke out on 23 July,and ended on 16 August,cell density summit reached 108.03 106cell/L.The dominant species was Anabaena,and the major reasons were the suspension and nitrogen fixation mechanism,along with the capacity to produce microcystin to inhibit the growth of other algal.Specific stratification model of water and adequate nutrients were necessary to the cyanobacteria bloom,and nitrate might be the major nitrogen source.Under the conditions of undisturbed water situation and adequate nutrients,the proliferation rate of cyanobacteria might be accelerated gradually with increasing water temperature and lowering Zmix/Zeu.Especially when Zmix/Zeuwas less than 0.5,it was more favorable to cyanobacteria growth.

关 键 词：三峡水库 香溪河库湾 蓝藻水华 混合层 

分 类 号：X524[环境科学与工程—环境工程]