聊城市东阿岩溶水系统水化学特征研究

Research on Hydrochemical Characteristics of Dong'e Karst Water System in Liaocheng City

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HCO_3-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。

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 ofleading to the changes of ion content. In 2015, the main type ofwater is HCO3-Ca in the Dongle karstwater 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 impactes on the safety of dringking water.