Upon using linear regression model,a new pH value model in Nanning was developed by means of empirical orthogonal functions(EOF) as predictors of previous meteorological,polluted and diffused data,and selecting the high relative principal components.

• 对南宁市降水pH值的前期气象场、污染特征和扩散条件等相关初选预报因子进行EOF展开,并取其中与预报量相关显著、且方差贡献大的主成分,结合逐步回归技术,建立了一种新的降水pH值预报模型。