• 关键词：统计分析  指标  水体

• 基金项目：

• 戴树桂
• 南开大学环境科学系, 天津 300071

• 庄源益
• 南开大学环境科学系, 天津 300071

• 金朝晖
• 南开大学环境科学系, 天津 300071

• 胡国臣
• 南开大学环境科学系, 天津 300071

• 袁有才
• 南开大学环境科学系, 天津 300071

• 陈广宏
• 南开大学环境科学系, 天津 300071

• 廖奕谋
• 南开大学环境科学系, 天津 300071

• 陈天乙
• 南开大学环境科学系, 天津 300071

• 摘要：介绍了模拟污染水体中各类指标的单回归分析, 逐步聚类分析, 主成份分析及逐步判别分析。在聚类图和判别函数中, 溶解氧与色度具有最紧密关系。水中总磷和氨氮对水质也有显着影响。对模拟试验样品, 主成份分类与判别分析分类的结果相类似, 而对城市河流样品用判别函数判别的结果与观察到的天然状态相一致。

• Abstract：The linear regression,hierarchical clustering,principal components and stepwise discriminant analysis of the parameters for polluted aquatic ecosystem in simulated tests are presented.The DO is closely related to CH in hiera-rchical clustering graph and in discriminant functions.Total phosphorous and ammonia nitrogen in water also have remarkable effects on water quali-ty.The results of the classification for the samples by principal components analysis are similar to those by stepwise discriminant analysis.For the sam-ples collected from urban river of Tianjin,the results of the discrimination were the same as those observed.

• Key words：statistical analysis  water quality

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