豫西鸡冠洞不同尺度滴水水化学分析及对区域极端干旱的响应
发布时间：2018-11-07 21:21
【摘要】：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。
[Abstract]:From October 2009 to December 2015, two dripping sites of Jiguandong, West Henan Province, (LYXS) and (TGBD) of Tiangong Ice Lamp were continuously monitored and sampled, and the rainstorm monitoring was carried out from August 4 to 6, 2015. The characteristics of droplet velocity, pH value, HCO_3~-, conductivity, Ca~ (2), Mg~ (2), Ba~ (2), Sr~ (2), element ratio and their relationship with precipitation were analyzed in different time scales. The results are as follows: 1) on an interannual scale, the hydrochemical characteristics of the water droplets in the Cave respond to the changes of precipitation in rainy and dry years caused by the ENSO cycle, which are mainly controlled by the dissolution of soil CO_2 and the leaching of overlying substances. The pre-deposition of (PCP); 2) on a seasonal scale, dripping water is affected by Karst water transport path, leaching, water-rock reaction time and pre-sedimentation. 3) on a single rainfall scale, the hydrochemical characteristics of dripping water vary with the drop rate, and are mainly affected by the migration path of karst water, piston effect, dilution effect and so on. But it has little relation with the reaction time of water-rock. 4) influenced by the dilution of the "old water" after the regional extreme drought in 2013 and the new precipitation in 2014, the extreme value of the drop water chemical index appeared in 2014, when the precipitation recovered.
【作者单位】： 岩溶环境重庆市重点实验室西南大学地理科学学院;国土资源部岩溶生态环境-重庆南川野外基地;河南省鸡冠洞风景名胜区管理处;
【基金】：国家重点研发计划专题项目(2016YFC050230205) 国家自然科学基金项目(41672160,41372177,40902053) 高等学校博士学科点专项科研基金项目(20090182120005) 中央高校基本科研业务费专项(XDJK2011B004)~~
【分类号】：P532;P641.3
本文编号：2317602
[Abstract]:From October 2009 to December 2015, two dripping sites of Jiguandong, West Henan Province, (LYXS) and (TGBD) of Tiangong Ice Lamp were continuously monitored and sampled, and the rainstorm monitoring was carried out from August 4 to 6, 2015. The characteristics of droplet velocity, pH value, HCO_3~-, conductivity, Ca~ (2), Mg~ (2), Ba~ (2), Sr~ (2), element ratio and their relationship with precipitation were analyzed in different time scales. The results are as follows: 1) on an interannual scale, the hydrochemical characteristics of the water droplets in the Cave respond to the changes of precipitation in rainy and dry years caused by the ENSO cycle, which are mainly controlled by the dissolution of soil CO_2 and the leaching of overlying substances. The pre-deposition of (PCP); 2) on a seasonal scale, dripping water is affected by Karst water transport path, leaching, water-rock reaction time and pre-sedimentation. 3) on a single rainfall scale, the hydrochemical characteristics of dripping water vary with the drop rate, and are mainly affected by the migration path of karst water, piston effect, dilution effect and so on. But it has little relation with the reaction time of water-rock. 4) influenced by the dilution of the "old water" after the regional extreme drought in 2013 and the new precipitation in 2014, the extreme value of the drop water chemical index appeared in 2014, when the precipitation recovered.
【作者单位】： 岩溶环境重庆市重点实验室西南大学地理科学学院;国土资源部岩溶生态环境-重庆南川野外基地;河南省鸡冠洞风景名胜区管理处;
【基金】：国家重点研发计划专题项目(2016YFC050230205) 国家自然科学基金项目(41672160,41372177,40902053) 高等学校博士学科点专项科研基金项目(20090182120005) 中央高校基本科研业务费专项(XDJK2011B004)~~
【分类号】：P532;P641.3
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