太湖蓝藻水华分级及其时空变化  

CHARACTERISTICS OF CYANOBACTERIA BLOOM GRADING AND ITS TEMPORAL AND SPATIAL VARIATION IN TAIHU LAKE

作　　者：刘聚涛[1] 杨永生[1] 高俊峰[2] 姜加虎[2] 

机构地区：[1]江西省水利科学研究院,江西南昌330029 [2]中国科学院南京地理与湖泊研究所,江苏南京210008

出　　处：《长江流域资源与环境》2011年第2期156-160,共5页Resources and Environment in the Yangtze Basin

基　　金：国家"973"项目(2008CB418106);中国科学院知识创新工程重大交叉项目(KZCX1-YW-14-6)

摘　　要：根据MODIS影像和实地监测叶绿素a浓度数据,采用太湖蓝藻水华分级评估方法,对2004～2008年太湖不同类型蓝藻水华类型进行评估并统计分析,探求太湖蓝藻水华特征及其时空变化规律,以期为太湖蓝藻水华预防和预警提供支持。结果表明:(1)2004～2008年,全湖共发生蓝藻水华414次,以小型蓝藻水华为主,发生333次,占总次数的80.43%;随着蓝藻水华级别的增加,发生次数逐渐减少;(2)空间上,蓝藻水华主要发生在太湖的北部和西部区域,并且蓝藻水华发生级别由高到低基本上沿西北-东南方向分布;(3)年际变化上,蓝藻水华发生次数呈逐渐增加趋势,蓝藻水华级别较高、次数较多的年份主要集中于2006年和2007年;(4)年内变化上,4～8月份,蓝藻水华发生次数呈增加趋势,8～11月,蓝藻水华发生次数逐渐减少。并且,蓝藻水华主要集中于5月和7～10月份,尤其是8～10月。Using MODIS satellite images and Chlorophyll-a concentration data and adopting cyanobacteria bloom evaluation method,this paper studied different type of cyanobacteria bloom from 2004 to 2008 in Taihu Lake,and explored the characteristics of cyanobacteria bloom and its spatial and temporal variation,which provided pre-prevention and early warning for cyanobacteria bloom.The results showed that from 2004 to 2008,there were 414 cyanobacteria bloom incidents,and small scale cyanobacteria bloom occured 333 times,which occupied 80.43% of the cyanobacteria bloom incidents.As the grade of the cyanobacteria bloom increased,the number reduced.In the space,cyanobacteria bloom occurred mainly in the northern and western regions.And the distribution of the cyanobacteria bloom grade from high to low was mainly accord with the direction from northwest to southeast.Among the annual change,the number of cyanobacteria bloom gradually increased.The year in which large-scale cyanobacteria bloom happened and the cyanobacteria bloom occurred frequently was concentrated on 2006 and 2007.The number of cyanobacteria bloom increased from April to August,and decreased from August to November.The cyanobacteria bloom concentrated in May and from July to October,especially from August to October.

关 键 词：蓝藻水华分级 特征 时空变化 太湖 

分 类 号：P425.55[天文地球—大气科学及气象学]