CAJ | 학술논문

在分析关中盆地水文地质背景的基础上，根据地下水的水文地球化学特征，讨论了研究区潜水的形成机理。结果表明：地下水水动力和水化学类型具有明显的水平分带特征，水动力场对水化学类型的分布起着控制性作用；Cl-浓度与 TDS的大小可用来表征研究区的蒸发强度；研究区内地下水离子交换作用主要发生在高矿化度的地下水中。PHREEQC模拟结果显示，沿地下水流向，路径1、2以方解石和石膏的沉淀为主，离子交换方式主要是 Na+-Ca2+交换；而路径3则以方解石沉淀、白云石和石膏溶解为主，除发生 Na+-Ca2+离子交换外，还存在着Ca2+-Mg 2+交换现象。
재분석관중분지수문지질배경적기출상，근거지하수적수문지구화학특정，토론료연구구잠수적형성궤리。결과표명：지하수수동력화수화학류형구유명현적수평분대특정，수동력장대수화학류형적분포기착공제성작용；Cl-농도여 TDS적대소가용래표정연구구적증발강도；연구구내지하수리자교환작용주요발생재고광화도적지하수중。PHREEQC모의결과현시，연지하수류향，로경1、2이방해석화석고적침정위주，리자교환방식주요시 Na+-Ca2+교환；이로경3칙이방해석침정、백운석화석고용해위주，제발생 Na+-Ca2+리자교환외，환존재착Ca2+-Mg 2+교환현상。
Based on the hydrogeological condit ions ofthe Guangzhong Basin and the hydrochemical characteristics ofgroundw a-ter, the formation mechanism ofunconfined groundw ater was analyzed. The results showed that(1) the types ofgroundw ater chemisty and groundw ater dynamic have horizont alzoning characteristics, and groundwater dynamic field controls the distribu-tion ofgroundw ater chemistry;(2) Cl- concentration and TDS can reflect the intensity ofevaporat ion in the study area;and(3) the ion exchange occurs mainly n groundwater with high salinity in study area. The results ofPHREEQC simulat ion showed that along groundw ater flow direction, the precipitat ion ofcalcite and gypsum and the exchange ofNa+ and Ca2+ occur at paths 1 and 2;w hereas the precipitat ion ofcalcite and dissolution ofgypsum and dolomite, and the exchange ofMg 2+ and Ca2+ in addi-tion to Na+ and Ca2+ occur at path 3.