基于主成分分析法的鹤地水库富营养状况评价

Eutrophication Evaluation of Hedi Reservoirs Based on Principal Component Analysis

为了解鹤地水库水体富营养状态,利用Spearman相关性分析和主成分分析法对鹤地水库2012—2022年主要水质参数的相关性和营养化的影响因子进行分析,同时运用主成分分析法和综合营养状态指数法两种评价方法对鹤地水库营养化状态进行评价。结果表明,鹤地水库水体富营养化与COD、CODMn有显著相关性,是表征水库富营养化程度的重要指标;两种评价方法对水库富营养化的评价得分具有显著相关性,说明主成分分析法对鹤地水库水体富营养状态评价具有较高可信度。

In order to understand the eutrophication status of Hedi reservoir,Spearman correlation analysis and principal component analysis were used to analyze the correlation of main water quality parameters and the influencing factors of eutrophication in Hedi reservoir from 2012 to 2022,while principal component analysis and comprehensive nutrient status index method,were applied to evaluate the eutrophication status of the reservoir.The results showed that the eutrophication of water bodies in Hedi Reservoir was significantly correlated with COD and CODMn,and were important indicators to characterize the eutrophication degree of the reservoir;the evaluation scores of eutrophication of the reservoir by the two evaluation methods were significantly correlated,indicating that the principal component analysis method has high credibility to evaluate the eutrophication status of water bodies in Hedi Reservoir.