人类开采活动影响下的衡水地区地下水水质特征及演化  

Water quality characteristics and evolution of groundwater system influenced by human exploitation activity in Hengshui area

作　　者：李莎[1] 成建梅[1] 李敏敏[1] 崔莉红[1] 

机构地区：[1]中国地质大学(武汉)环境学院,武汉430074

出　　处：《南水北调与水利科技》2016年第3期55-61,100,共8页South-to-North Water Transfers and Water Science & Technology

基　　金：国家重点基础研究发展计划(973计划)(2010CB42880203)~~

摘　　要：衡水地区地下水普遍存在"上咸下淡"的水质格局,受深部淡水持续超采影响,浅层咸水有逐年下移而使淡水咸化的趋势。选择衡水地区典型剖面,通过水质长期监测,结合地下水开采情况,分析2011至2014年该剖面上地下水水位与水质监测资料,总结了衡水地区地下水水化学特征及其演化规律。研究结果表明,浅层含水层中水平径流微弱,地下水水质由西向东逐渐好转,其中西部地下水离子浓度变化较大;深部含水层中水平径流明显,地下水水质整体良好,但有逐年恶化的趋势;人类开采活动一定程度上增强了浅层和深层含水层间的水力联系,使二者中离子浓度随时间的波动呈现出一定的相关性。The water pattern that brine mainly distributed on upper aquifer and freshwater retained in the deeper sediments commonly existed in the Hengshui district.Being excessive exploitation,the deeper freshwater trended to be salty induced by the shallow brine downward mitigation.A typical profile of domain was selected to investigate groundwater chemical characteristics variation,and its corresponding evolution mechanisms was analyzed via the data of water level,chemical changes and groundwater pumping during 2011-2014.The results showed that,the shallow aquifer showed a weak runoff in the horizontal direction;the shallow groundwater had a behavior of diverse chemical distribution with water quality improved from west to east among which ion concentration fluctuated significantly in the west.Reversely,horizontal runoff of deeper aquifer was strengthened by human excessive exploitation.There was a tendency to deteriorate in deep water though a better water quality remained nowadays.Hydrodynamic between adjacent aquifers was enhanced by pumping activities.There were some correlations of ion content between them and water seeped from irrigation took major accounts of recharge.Thereby,the deep freshwater was getting worse with interface of downward saline water.

关 键 词：水质变化 TDS 离子浓度 离子比值 水力联系 咸淡水界面 越流补给 

分 类 号：P641[天文地球—地质矿产勘探]