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引用本文:王书航,姜霞,金相灿.巢湖水环境因子的时空变化及对水华发生的影响.湖泊科学,2011,23(6):873-880. DOI:10.18307/2011.0608
WANG Shuhang,JIANG Xia,JIN Xiangcan.Spatial-temporal variations of aquatic environmental factors and their influences to algal blooming in Lake Chaohu. J. Lake Sci.2011,23(6):873-880. DOI:10.18307/2011.0608
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巢湖水环境因子的时空变化及对水华发生的影响
王书航, 姜霞, 金相灿
中国环境科学研究院, 北京 100012
摘要:
为研究巢湖水环境因子与藻类生物量的相互作用, 筛选出对藻类生物量相对重要的环境因子, 以2008年巢湖水质监测数据为基础, 采用多元统计方法对巢湖监测点数值数据进行了聚类分析、判别分析及污染特征识别, 研究了水环境因子与藻类生物量的关系.结果表明:巢湖水环境自西向东分为重度污染区、中度污染区和轻度污染区, 叶绿素、溶解性总氮可作为巢湖水环境空间显著性差异的指示因子.各监测点污染分级排序为:南淝河入湖区 >十五里河入湖区 >塘西河入湖区 >西半湖湖心 >派河入湖区 >杭埠河入湖区 >忠庙 >兆河入湖区 >坝口 >东半湖湖心 >造船厂 >中垾乡.对藻类生物量影响较大的环境因子存在季节性变化, 全年总磷、总氮、温度、硝氮、铵氮与藻类生物量的关系较为密切。
关键词:  时空变化  因子分析  聚类分析  多元回归  巢湖  水华
DOI:10.18307/2011.0608
分类号:
基金项目:国家自然科学基金项目(21077097);国家水体污染控制与治理科技重大专项项目(2008ZX0701-010)联合资助
Spatial-temporal variations of aquatic environmental factors and their influences to algal blooming in Lake Chaohu
WANG Shuhang, JIANG Xia, JIN Xiangcan
Chinese Research Academy of Environmental Sciences, Beijing 100012, P.R.China
Abstract:
In order to understand the interactions between environmental factors and the algal biomass in Lake Chaohu, those rela-tively important environmental factors to alga biomass were extracted.Based on monitored water quality data of Lake Chaohu in 2008, cluster analysis, discriminate analysis and the recognition of pollution feature were carried out to reveal the relationships be-tween water environment factors and algal biomass.Results suggest that the Lake Chaohu can be divided into severe polluted area, moderately polluted area, and mildly polluted area from west to east.The Chl.a and dissolved total nitrogen are the indicative fac-tors describing the significantly spatial difference in water environment.The sequence of pollution classification for all the monito-ring sites are as follows:Nanfei river inlake area >Shiwuli river inlake area >Tangxi river inlake area >West lake center area >Paihe river inlake area >Hangbu river inlake area >Zhongmiao area >Zhaohe river inlake area >Bakou area >East lake center area >Ship factory >Zhonghan town area.The screened important environmental factors to algal biomass vary with seasons.TP, TN, temperature, NO3--N and NH4+-N are closely related to algal biomass all the year round.
Key words:  Spatial-temporal variations  factor analysis  cluster analysis  multiple regression  Lake Chaohu  algal bloom
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