Changes study of groundwater quality of Xijiao well fields and downtown springs in Jinan

This paper studied changes of groundwater quality in Xijiao well fields and four springs in the downtown of Jinan city by comparing and analyzing the hydrochemical and isotopic data in 1984,1989,2005 and 2006,respectively.The results showed that great environmental changes had been happened in the recharge area and discharge area in Jinan since 1980’s.This changes resulted in non-mineral solution SO42-input increased,which was disproportionate with Mg2+.Presently,the exploited water