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1、呼和浩特市浅层地下水水化学特征演变规律摘要：针对地下水过量开采导致水资源短缺而严重遏制了呼和浩特市生态经济持续发展的现状，以呼和浩特市平原区为研究对象，对呼和浩特市浅层地下水进行系统取样分析，综合运用描述性分析，相关性分析，折线和饼图图示法，全面系统地研究了呼和浩特市浅层地下水水化学特征与矿化度演变规律。研究结果表明：①呼和浩特市浅层地下水中HCO.32-和Ca2+平均浓度为333525mg/L和829704mg/L，两值均较大，变异系数较小，反映了它们在地下水中的绝对含量较高，为地下水中的主要离子。②地下水中的Na+和Mg2+离子主要是
2、来自各种硫酸盐，重碳酸盐和盐酸盐，地下水中的Ca2+离子主要来自各种硫酸盐和盐酸盐。地下水的矿化度高低主要是由水中的Mg2+和Cl-的浓度来控制的。③沿地下水水流方向,主要离子并不遵循随流程的增加而浓度增加的趋势，而是与地下水温呈现显著的负相关性。HCO.32-和Ca2+离子与地下水温度的负相关最为显著，即温度越低时，离子的浓度反而越高。 关键词：水文化学；浅层水；矿化度；呼和浩特 HydrochemicalCharacteristicsandVariationofMineralizationfortheGroundwaterinHo
3、hhotCountry ZHANGYi-long,WANGLi-juan,WANGWen-zhong,LIZheng-hong,YUJuan,CAOWen-geng,LONGWen-hua,MIAOQing-zhuang,WANGZhe (TheInstituteofHydrogeologyandEnviromentalGeoloy,CAGS,Shijiazhuang050061,China) Abstract:Accordingtoexcessiveexploitationofgroundwatercausedtheshortag
4、eofwaterwhichseriouslyhalttheEcologicalandeconomicsustainabledevelopmentofHohhot.ThispaperwassystematicallysampledandanalyzedtheshallowgroundwaterofHohhot'splain.DescriptiveanalysisandcorrelationanalysisweresyntheticallyusetocomprehensivelyandsystematicallystudytheGroundwate
5、rchemical'slawandthesalinityevolution'scharacter.Researchresultsshownasfollows：First，theaverageconcentrationofHCO.32-andCa2+whicharederivedfromtheshallowgroundwaterofHohhotare333.525mg/Land82.970mg/L,thevaluesoftheHCO.32-andCa2+’saverageconcentrationarebiggerandcoefficientof
6、variationaresmaller.Secondly,Throughthecorrelationanalysis,weknowthattheNa+andMg2+oftheundergroundwatermainlycomefromthevariousSulfate,bicarbonateandhydrochloride,andtheCa2+oftheundergroundwatermainlycomefromallsortsofsulfateandhydrochloride.Thediscretionoftheundergroundwat
7、ersalinityismainlycontrolledbytheconcentrationsoftheMg2+andCl-whicharecomefromtheundergroundwater.Thethird,alongthegroundwaterflowdirection,themainlyionconcentrationsbidnotfollowthetrendwhichiswiththeincreaseof5flowtoincrease,butandtheundergroundwatertemperaturepresentsigni
8、ficantlynegativecorrelation.ThenegativecorrelationoftheHCO.32-,Ca2+andgroun
