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为揭示地下河地球化学的变化特征及其控制因素,从2009年10月至2014年12月对河南西部栾川县鸡冠洞地下河的水化学指标进行了5个完整水文年的的动态监测.从地球化学敏感指数的角度出发,探讨不同条件下主量元素的地球化学敏感性差异,结果表明:1研究区地下河水化学阳离子以Ca~(2+),Mg~(2+)为主,阴离子以HCO_3~-主.2受农业活动的影响,地下河主量元素地球化学敏感性从高到低依次为HCO_3~-,Mg~(2+),Cl~-,Ca~(2+),NO_3~-,SO_4~(2-),Na~+,K~+,其中NO_3~-,Cl~-敏感性更加突出;受人类旅游活动的影响,地下河主量元素地球化学敏感性从高到低依次为HCO-3,Mg2+,Ca2+,Na+,NO-3,SO2-4,Cl-,K+,可见旅游活动对地下河的地球化学特征影响程度较弱.3将5年主量元素进行对比发现,受农业活动影响更加敏感的NO_3~-、Cl~-质量浓度均出现了增长的现象,说明人类活动尤其是农业活动对地下河水质的影响在逐渐增加.
In order to reveal the characteristics of geochemical changes of underground rivers and their controlling factors, the hydrological indices of Jiguan Cave underground river in Luanchuan County, western Henan Province, were monitored from October 2009 to December 2014 for five complete hydrological years. The geochemical sensitivities of the major elements under different conditions are discussed from the perspective of geochemical sensitivity index. The results show that: (1) The chemical cations of underground river water in the study area are dominated by Ca2 + and Mg2 + The anions are dominated by HCO_3 ~ - main.2 by agricultural activities. The geochemical sensitivities of major elements of underground river are HCO_3 ~ -, Mg ~ (2 +), Cl ~ -, Ca ~ (2+) , NO_3 ~ -, SO_4 ~ (2 -), Na ~ +, K ~ +, of which NO_3 ~ - and Cl ~ - are more prominent. According to the influence of human tourism activities, the geochemical sensitivity of main elements of underground river from The order of HCO-3, Mg2 +, Ca2 +, Na +, NO-3, SO2-4, Cl-, K + shows that tourism activity has a weak influence on the geochemical characteristics of the underground river.3 The main elements It is found that the NO_3 ~ - and Cl ~ - concentrations, which are more sensitive to agricultural activities, all show an increase, indicating that the impacts of human activities, especially agricultural activities, on groundwater quality are gradually increasing .