因子分析方法在农业地质环境评价中的应用——以浙江省杭州市萧山区浅层地下水质量评价为例

摘要

Aiming at the problem of the agro-geologic environment synthetic estimate is comparatively difficult because of its so many involved factors, the quantitative-rization of geology characteristic is important and difficult point of agriculture geology environment appraisal now. The author applies factor analysis method to discuss the quantitative-rization of chemistry characteristic appraisal of shallow groundwater, three principal factors implying important significances are found through R-type factor analysis of chemistry composition of the samples. Furthermore, the authors calculate the score of every principal factor. The inclusion shows that the score of R-type principle factors are obviously different between samples, and then, this difference can be a kind of quantitative expression for chemical characters of shallow groundwater, and be helpful to it's classification and protective management.%针对目前农业地质环境评价涉及因素众多、对其做综合评价比较困难的问题,提出当前农业地质环境评价的重点及难点是地质特征的数字化及量化.运用因子分析方法对杭州市萧山区浅层地下水化学特征评价定量化问题进行了尝试性探讨,通过对采样所得浅层地下水化学成分进行R型因子分析,得到了3个具有重要意义的主因子,并进一步计算了3个主因子的得分.结果表明,不同浅层地下水样品其R型主因子的因子得分存在明显差异,可以作为浅层地下水化学特征评价的定量化表示,为浅层地下水的水质分类利用及保护管理提供了一定的依据.