Fig. 3. Box-whiskers plots of the major water quality variables highly correlated with three significant principal components. (a) Caohai; (b) Waihai; (c) Yangzong; (d) Fuxian Hu; (e) Xingyun Hu; (f) Qilu Hu; (g) Yilong Hu; (h) Erhai; (i) Chenghai; (j) Lugu Hu.