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论文对自2009年10月到2015年12月豫西鸡冠洞两处滴水:鲤鱼戏水(LYXS)和天宫冰灯(TGBD)进行了连续定点监测及取样分析,并结合2015年8月4—6日对其进行的暴雨监测,从不同时间尺度上分析了滴水的滴速、pH值、HCO_3~-、电导率、Ca~(2+)、Mg~(2+)、Ba~(2+)、Sr~(2+)、元素比值等指标的变化特征及其与降水的关系。结果表明:1)年际尺度上,鸡冠洞滴水的水化学特征响应ENSO循环引起的多雨年与干旱年降水的变化,其主要受控于土壤CO_2的溶解、上覆物质的淋滤、先期沉积作用(PCP)的强弱;2)季节尺度上,滴水受岩溶水运移路径、淋滤作用、水-岩反应时间及先期沉积作用等因素综合影响表现出明显的季节变化特征;3)在单场降雨尺度上,滴水的水化学特征都不同程度表现出随滴率的变化而变化的趋势,主要受到岩溶水的运移路径、活塞效应、稀释作用等因素影响,而与水-岩反应时间关系不大;4)受到2013年区域极端干旱后“老水”的滞留与2014年新降水的稀释作用影响,其滴水水化学指标的极端值出现在降水量有所回升的2014年。
In this paper, continuous spot monitoring and sampling analysis were carried out on two dripping water of Jiguguan Cave in western Henan Province from October 2009 to December 2015: LYXS and TGBD, The drip rate, pH, HCO 3 -, conductivity, Ca 2+, Mg 2+, Ba 2+ in drip water were analyzed from different timescales. , Sr ~ (2+), element ratio and other indicators and its relationship with precipitation. The results show that: 1) On the interannual scale, the chemical characteristics of the water drop in Jiguan Cave respond to the change of rainy years and annual precipitation caused by ENSO cycle, which are mainly controlled by the dissolution of soil CO 2, the leaching of overlying substances, (PCP). (2) On the seasonal scale, the drip water shows obvious seasonal variation under the influence of karst water transport path, leaching, water-rock reaction time and pre-sedimentation. 3) On the field rainfall scale, the chemical characteristics of drip water showed different trend with the drop rate, which was mainly affected by the migration path of the karst water, the piston effect and the dilution effect, but not with the water-rock reaction time The relationship between drifting water chemical indicators and precipitation was not significant. (4) Due to the stagnation of “old water” after 2013 due to extreme regional drought and the dilution effect of new precipitation in 2014, the extreme value of drip water chemical indicators appeared in 2014 when the precipitation increased.