In view of the groundwater quality deterioration , this paper analyzed the data of annual water quality changes at the representative monitoring sites of the Dong-e karst water system , and made contrastive analysis of the water chemistry indicators distribution between in dry season and wet season. The results show that TDS is between 400mg/L and 700 mg/L , change oif total hardness is not obvious , and rainfall recharge is the main factor of leading to the changes of ion content. In 2015 , the main type of water is HCO3-Ca in the Dong'e karst water system, the ions movement rule is basically same in dry season and wet season , and there is water pollution at some monitoring sites , which lead to the change of ion content. TDS concentration in wet season is higher than that in dry season , and TDS concentration in discharge areas, which im-pactes on the safety of dringking water.%针对地下水水化学环境恶化的现象,分析研究东阿岩溶水系统典型监测点多年水质动态变化资料,并对系统内2015年枯水期丰水期主要水化学指标的分布变化规律进行了分析对比,结果表明:多年来TDS位于400~700 mg/L之间,总硬度变化不显著,降雨补给是导致离子含量变化的重要因素;2015年东阿岩溶水系统内水质类型以HCO3-Ca型为主,枯丰水期离子运移规律大致相同,部分监测点存在污染问题,离子含量因污染现象发生明显改变;丰水期TDS含量高于枯水期TDS含量,排泄区TDS浓度偏高,对居民饮水安全造成一定影响.
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