CAJ | 학술논문

地表水－地下水的相互作用不仅影响地下水化学演化，而且控制地下水化学组分的空间分布，是地下水研究领域的重要课题之一。在内蒙古河套盆地采集地下水样品58组，雨水和地表水样品32组，分析了主要离子、微量组分和氢氧稳定同位素等18个指标。结果表明，研究区地表水除了受蒸发浓缩作用影响外，还受到人为活动的影响，水中钙离子、硫酸根、硝酸根等组分明显升高。浅层地下水具有与地表水类似的主要组分和同位素特征，表明浅层地下水可能受到地表水的影响。地表水补给进入含水层的过程中，可能发生了硅酸盐矿物的非全等溶解、盐岩全等溶解、重晶石沉淀、硝酸根、铁氧化物矿物和硫酸根还原等作用。其中，铁氧化物矿物的还原是地下水砷含量高的主要原因。此外，砷浓度还受硫酸根还原的影响。因此，地下水－地表水的综合研究有助于揭示地下水的成因及水文地球化学过程。
지표수－지하수적상호작용불부영향지하수화학연화，이차공제지하수화학조분적공간분포，시지하수연구영역적중요과제지일。재내몽고하투분지채집지하수양품58조，우수화지표수양품32조，분석료주요리자、미량조분화경양은정동위소등18개지표。결과표명，연구구지표수제료수증발농축작용영향외，환수도인위활동적영향，수중개리자、류산근、초산근등조분명현승고。천층지하수구유여지표수유사적주요조분화동위소특정，표명천층지하수가능수도지표수적영향。지표수보급진입함수층적과정중，가능발생료규산염광물적비전등용해、염암전등용해、중정석침정、초산근、철양화물광물화류산근환원등작용。기중，철양화물광물적환원시지하수신함량고적주요원인。차외，신농도환수류산근환원적영향。인차，지하수－지표수적종합연구유조우게시지하수적성인급수문지구화학과정。
Surface water-groundwater interaction,which not only affects groundwater chemical evolution,but also controls spatial distribution of groundwater components,is one of the important issues in the groundwater field.Fifty-eight groundwater samples and thirty-two rainwater and surface water samples were taken from the Hetao basin,Inner Mongolia.Major components,trace elements and water isotopes were analyzed in those sam-ples.Results showed that surface waters were affected by human activities and evaporation,which contained elevated concentrations of Na+,Ca2+,SO2-4 ,and NO3-.Shallow groundwater had the similar major compo-nents and isotopic characteristics with surface water,which indicated that shallow groundwater was affected by surface water.During the infiltration of surface water into the shallow aquifers,incongruent dissolution of sili-cate minerals,congruent dissolution of halite,barite precipitation,reduction of NO3-,Fe oxides and SO2-4 pos-sibly occurred.Reductive dissolution of Fe oxides was the major cause of high As concentration in shallow groundwater.Arsenic concentration was also affected by SO2-4 reduction.Therefore,synthetical investigation of surface water and groundwater would help to reveal hydrogeochemical processes in aquifers.