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引用本文:刘元波,高锡芸.太湖北部梅梁湾水域水质因子聚类.湖泊科学,1997,9(3):255-260. DOI:10.18307/1997.0310
Liu Yuanbo,Gao Xiyun.Factor cluster analysis of water quality in Meiliang Bay, Taihu Lake. J. Lake Sci.1997,9(3):255-260. DOI:10.18307/1997.0310
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太湖北部梅梁湾水域水质因子聚类
刘元波, 高锡芸
中国科学院南京地理与湖泊研究所, 南京 210008
摘要:
计算了沿梁溪河河口到太湖湖心断面上10个监测点17个水质因子93组数据的Pearson相关系数和Kendall秩相关系数,进而运用最小距离法进行了因子聚类。正态分布检验和聚类结果表明,采用Kendall秩相关进行因子聚类为宜。结果将诸因子聚为五大类:TDN、TN、CON、NO2-N、NH4-N、OH和CODMn归为一类;TDP、TP、PO43-和pH值归为一类;SS和SD归为一类。反映了该水域环境五个方面特性:氮素污染、磷素污染、水体光学性质、水体藻类变化以及氮类污染物时空降解过程。
关键词:  太湖  水质  相关  聚类分析
DOI:10.18307/1997.0310
分类号:
基金项目:国家自然科学基金(39500027)和江苏省社会发展研究基金(BS95035)资助项目
Factor cluster analysis of water quality in Meiliang Bay, Taihu Lake
Liu Yuanbo, Gao Xiyun
Nanjing Institute of Geography and Limnology, Chinese Acadmey of Sciences, Nanjing 210008
Abstract:
With the development of regional economy, Taihu Lake, which is situated in the subtropical zone of China, has been becoming a eutrophic lake. Its state of aquatic environment began to be monitored in 1991, under the support of TaiLLER (Taihu Laboratory for Lake Ecosystem Research). From the mouth of the Liangxi River to the centre of Taihu Lake, there set up 10 monitoring sites. Seventeen factors of water quality are involved in this paper. Pearson correlation and Kendall rank correlation are used to calculate the coefficients of factors and the coefficient matrixes are obtained, respectively. The minimum distance method is adopted to proceed the cluster analysis. The results show that the cluster analysis based on rank correlation coeffee-icient is reasonable while that on Pearson correlation coefficient improbable. The normal distribution test indicated that only the data of pH value and water temperature are abided by the normal distribution. It is necessary to proceed the normal distribution test before Pearson correlation is applied. Seventeen factors are classified into five groups by means of cluster analysis based on Kendall rank correlation coefficient as follows:(1) total dissolved nitrogen(TDN), total nitrogen(TN), nitrite nitrogen (NO2-N).am-moniacal nitrogen (NH4-N), alkalinity (OH), conductivity (CON), and chemical oxygen de-mond (CODMn).(2) total dissolved phosphorus (TDP), total phosphorus (TP), phosphate (PO43-) and pH value. (3) suspended substance(SS) and transparency(SD). (4) dissolved oxygen(DO), water temperature(Tw) and chlorophyll a(ChL.a). (5) nitrate nitrogen(NO3-N). Five groups reflect five respects of this aquatic environment:nitrogen pollution, phosphorus pollution, optical property, algal changes, and temporal and spatial variations of nitrogen pollutant.
Key words:  Taihu Lake  water quality  correlation  cluster analysis
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