| 溶洞穴滴水元素季节变化及其气候指示意义研究—以贵州省麻黄洞为例 |
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| 引用本文： | 朱粲粲,周忠发,汪炎林,薛冰清,汤云涛,范宝祥.溶洞穴滴水元素季节变化及其气候指示意义研究—以贵州省麻黄洞为例[J].水文,2021,41(1):102-108. |
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| 作者姓名： | 朱粲粲 周忠发 汪炎林 薛冰清 汤云涛 范宝祥 |
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| 作者单位： | 贵州师范大学喀斯特研究院/地理与环境科学学院;贵州省喀斯特山地生态环境国家重点实验室培育基地 |
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| 基金项目： | 贵州省科技计划项目(黔科合基础[2020]1Y154);国家自然科学基金项目(41661088);贵州省高层次创新型人才培养计划项目(黔科合平台人才[2016]5674)。 |
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| 摘 要： | 为揭示岩溶洞穴滴水元素季节变化特征及其对外界气候环境变化的响应关系,对贵州绥阳双河洞系支洞麻黄洞内3处滴水的Mg、Ca、Sr元素进行了为期13个月的监测。结果显示:(1)3个滴水点M1、M2和M3的水化学类型主要为HCO3·Ca型,岩溶水对于方解石与白云石等矿物的溶解处于饱和状态;(2)上覆土壤和岩层厚度逐渐增加,导致水-土-岩作用时间也随之增加;(3)Ca^2+、Mg^2+、Sr^2+浓度变化总体上呈逐级递增的特点,各离子浓度在高温多雨季节波动幅度大,低温少雨季节变化平稳;(4)Mg/Ca、Sr/Ca均表现出雨季低、旱季高的特征,反映该地区外界干湿条件的变化;(5)由模型模拟显示,3个滴水点皆以PCP/ICD作用为主,M1对降雨响应不敏感,M2滴率与离子浓度呈雨季高、旱季低的变化规律,M3位于洞穴最深、顶板最厚处,滴率与离子浓度无显著季节变化特征。结合各滴水点洞穴环境变化规律,推断M2更能准确响应外界气候环境变化。
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| 关 键 词： | 洞穴滴水 元素 气候变化 水环境化学 |
Study on Seasonal Change of Dripwater Elements and Its Climatic Significance in Karst Caves:Taking the Case of Mahuang Cave,Guizhou Province |
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| ZHU Cancan,ZHOU Zhongfa,WANG Yanlin,XUE Bingqing,TANG Yuntao,FAN Baoxiang.Study on Seasonal Change of Dripwater Elements and Its Climatic Significance in Karst Caves:Taking the Case of Mahuang Cave,Guizhou Province[J].Hydrology,2021,41(1):102-108. |
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| Authors: | ZHU Cancan ZHOU Zhongfa WANG Yanlin XUE Bingqing TANG Yuntao FAN Baoxiang |
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| Institution: | (School of Karst Science/School of Geography and Environmental Sciences,Guizhou Normal University,Guiyang 550001,China;State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province,Guiyang 550001,China) |
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| Abstract: | In order to reveal the seasonal variation characteristics of drip elements in karst caves and its response to changes in the external climate environment,this paper had monitored elements,including Mg,Ca,and Sr in drip water at three locations in the Mahuang Cave of the Shuanghe Cave System for 13 months.The results show that(1)The water chemistry types are mainly HCO3·Ca at the three dripping points(M1,M2 and M3),besides,the dissolution of calcite,dolomite and other minerals in karst water are in a saturated state.(2)The increasingly overlaying soil and rock layer thickness lead to the time extension of watersoil-rock reaction.(3)The concentration variation of Ca^2+,Mg^2+,Sr^2+are gradually increasing as a whole.Ion concentration highly fluctuate in rainy season while is stable in low-temperature and low-rain season.(4)Mg/Ca and Sr/Ca ratios show the characteristics of low rain season and high dry season,reflecting the changes of the external dry and wet conditions in the area.(5)The model simulation shows that the three points are dominated by the reaction of PCP/ICD.M1 is not sensitive to rainfall response;the change pattern of M2’s drop rate and ion concentration are high in rainy season while low in dry season;M3 is located in the deepest part of the cave with thickest roof,and its drop rate and ion concentration have no significant seasonal variation characteristics.Thus,it is inferred that M2 can more accurately respond to changes in the external climate environment. |
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| Keywords: | cave drip water element climate change hydrochemistry environment |
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