| 桂林硝盐洞洞穴滴水示踪及气候环境意义研究 |
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| 引用本文： | 殷建军,郭小娇,姜光辉,郭芳,唐伟,汤庆佳,刘绍华.桂林硝盐洞洞穴滴水示踪及气候环境意义研究[J].水文,2017,37(4):18-23. |
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| 作者姓名： | 殷建军 郭小娇 姜光辉 郭芳 唐伟 汤庆佳 刘绍华 |
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| 作者单位： | 国土资源部/广西岩溶动力学重点实验室国际岩溶研究中心中国地质科学院岩溶地质研究所国土资源部/广西岩溶动力学重点实验室国际岩溶研究中心中国地质科学院岩溶地质研究所 |
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| 基金项目： | 中国地质科学院基本科研业务费项目(YWF201414)；岩溶地质研究所基本科研业务费项目(2014025,201319)；国家自然科学基金项目(41172231,41472239,41502176)；中国地质调查局地调项目(12120113006700,DD20160305)； |
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| 摘 要： | 洞穴滴水对大气降水的滞留时间的研究是准确解译洞穴沉积物气候环境代用指标的重要内容。由于研究尺度和技术手段的差异,目前对滞留时间的研究重视程度仍不够。基于此引入水文地质领域成熟的示踪方法,对桂林丫吉硝盐洞滴水对大气降水响应时间进行了连续高分辨率的研究。利用野外自动化荧光仪和荧光示踪剂,实现了滴水的自动化示踪研究,节省了人力物力且提高了分辨率。通过两次示踪试验,确定了桂林丫吉硝盐洞滴水雨季对大气降水的响应时间小于48h,一些强降雨事件,滞留时间甚至小于4h。发现滴水的温度变化可以作为高分辨率监测时大气降水形成径流的示踪剂。对于桂林丫吉硝盐洞XY5常年性滴水点,雨季日降雨强度大于16.3mm就可以形成径流,并被监测到。XY5滴水点主要存在两个水源补给,常年的基流补给和大气降水的快速补给。这些认识对洞穴滴水监测和洞穴沉积物古气候环境重建有着很好的借鉴意义。
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| 关 键 词： | 滞留时间 示踪试验 洞穴滴水 硝盐洞 桂林 |
| 收稿时间： | 2016/4/25 0:00:00 |
Tracer Test of Drip Water in Xiaoyan Cave, Guilin and Its Climatic and Environmental Significance |
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| YIN Jianjun,GUO Xiaojiao,JIANG Guanghui,GUO Fang,TANG Wei,TANG Qingji,LIU Shaohua.Tracer Test of Drip Water in Xiaoyan Cave, Guilin and Its Climatic and Environmental Significance[J].Hydrology,2017,37(4):18-23. |
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| Authors: | YIN Jianjun GUO Xiaojiao JIANG Guanghui GUO Fang TANG Wei TANG Qingji LIU Shaohua |
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| Institution: | Key Laboratory of Karst Dynamics, Ministry of Land and Resources and Guangxi, International Research Center on Karst under the Auspices of UNESCO, Institute of Karst Geology, Chinese Academy of Geological Science, Guilin 541004, China |
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| Abstract: | The study on the residence time of cave drip water responding to the rainfall is important for accurate interpreting the meaning of the climate and environmental index in cave speleothems. For the difference of research scales and techniques, it is not paid enough attention to in the past. So this paper introducedto the tracer test technique often used in hydrogeology for cave residence time research, and made the Xiaoyan Cave in Yaji Experimental Site, Guilin, for an example. It improved the resolution in cave drip water monitoring, by using GGUN-FL30 in-situ flow-through fluorometer and tracer uranin. Based on twice tracer tests, we determined the residence time of perennial drip site XY5 in Xiaoyan Cave is less than 48 hour in rainy season, and even less than 4 hour in some rainstorm events. Meanwhile, the drip water temperature can be used as a tracer for rainfall which can produce groundwater runoff in high resolution monitoring. The runoff can be monitored when the daily rainfall is up to 16.3mm. At least two recharge sources can be identified, one is perennial base flow and the other is fast groundwater runoff produced by rainfall. |
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| Keywords: | residence time tracer test cave drip water Xiaoyan Cave Guilin |
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