主成分分析法用于环境质量评价的探讨

Study of Applying Principal Component Analysis to Environmental Quality Assessment

文章将主成分分析法用于某河流水质评价,得出该河流历年水质变化趋势,但得到的水质评价等级却与实际情况不符。通过对主成分分析法原理进行研究,得出两个结论:主成分分析法可用于比较不同时间或不同地点的环境质量优劣;主成分分析法不能评价出环境质量等级。这主要是由主成分分析法的本质特点所决定。

This paper applies principal component analysis to water quality assessment, we obtain the water quality changes, but the received water quality evaluation grades are inconsistent with the actual situation. Though studying the principle of principal component analysis, we conclude that principal component analysis can be used to compare environmental quality at different times or in different locations ; and principal component analysis could not evaluate the grade of environmental quality.