动态聚类分析与太湖水质分区

以总硬度、pH、溶氧、化学耗氧、总氮、总磷、浮游植物、透明度8项指标为依据,参照现行湖泊营养类型划分标准,应用fuzzy聚类分析方法对我国42个主要湖泊聚类并划分其营养类型,同时对各类型的指标特征进行了分析。结果表明:在相似水平λ=0.69下,42个湖泊共聚为13类。其中,中、富营养型有较强的相似性,其差异显著的指标为总氮、总磷和化学耗氧量;贫营养型湖泊相似性差,其共同特征是指标中一项或数项显著异于一般营养范围。聚类结果与传统分类基本吻合。

Dynamic cluster analysis and distributions of water quality in Taihu Lake

According to the date of water quality collected from Taihu Lake in 1987-1988,seventeen indexes in three pollution types of organic matter,hygienic index,nutrients,toxic and harmful materials were evaluated by means of a systematic dynamic cluster analysis.The spatial distribution of pollution index in Taihu Lake and the differences of index character were obtained,and the results revealed three type pollution models and their distribution status.This paper offers an important information for further improving water quality and controlling water pollution of Taihu Lake.