| 宜昌潮水洞岩溶间歇泉动态特征及成因 |
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| 引用本文： | 郭绪磊,陈乾龙,黄琨,周宏.宜昌潮水洞岩溶间歇泉动态特征及成因[J].地球科学,2020,45(12):4524-4534. |
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| 作者姓名： | 郭绪磊 陈乾龙 黄琨 周宏 |
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| 作者单位： | 1.中国地质大学环境学院, 湖北武汉 430078 |
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| 基金项目： | 中国地质调查局项目DD20190824中国地质大学(武汉)中央高校基本科研业务费专项资金资助项目1910491A28 |
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| 摘 要： | 潮水洞无降雨补给时仍有规律的间歇性流出，是典型的岩溶间歇泉，其流量、水化学动态规律及形成机制缺乏系统的研究.基于长期水文气象观测和水化学测试数据，分析了潮水洞不同时期流量、水温和电导率变化特征以及潮水洞岩溶水系统的水化学特征.潮水洞为多个岩溶水子系统的连接，其动态呈现为雨期和无雨期两个不同特征，且存在多个不稳定周期的间歇出流过程.通过c(Mg2+)/c(Ca2+)比值及水文动态特征辨识出间歇出流的地下水来源为天河板组灰岩含水层，随着过程流量的不断增加，深循环地下水占比最高达97%.结合水文地质条件概化出潮水洞岩溶水系统循环模式，天河板组灰岩含水层内虹吸管道的发育是间歇性动态特征的主要成因.
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| 关 键 词： | 潮水洞间歇泉 泉动态特征 离子比值法 调蓄能力 水文地质 |
| 收稿时间： | 2020-04-29 |
Dynamic Features and Causes of Chaoshuidong Siphonal Spring |
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| Abstract: | The Chaoshuidong Siphonal Spring () is in Yichang City, Hubei Province, which could still regularly intermittently flows out when there is no rain. Systematic research into the flow and hydrochemical dynamics and formation mechanisms of CSS is lacked. Based on long-term hydrological and meteorological observation data and hydrochemical test data, in this paper, it analyzes and summarizes the changes in the flow, water temperature and conductivity of the CSS at different times, and also analyzes the hydrochemical characteristics of the CSS karst water system. The CSS karst water system can be divided into the local water flow system of the Shilongdong Group and the intermediate water flow system of the Tianheban Group, and its dynamic characteristics can be divided into two distinct periods of rain and rain-free periods, which reflects the rapid response of karst water system to rainfall and the control function of karst siphon pipe to the intermediate water flow system of Tianheban Group, respectively.There are many intermittent flow out of multiple unstable cycles during the rain-free period. The source of intermittent discharge groundwater was identified by ion ratio method and the analysis of hydrodynamic features as the Tianheban Group rock aquifer, and with the increasing process flow, the proportion of deep-cycle groundwater reached 97%. Finally, combined with hydrogeological condition analysis, in the paper it summarizes the conceptual pattern map of water circulation in the CSS karst water system, and the development of the siphon pipe inside the gray rock aquifer of the Tianheban Group forms the characteristics of the water circulation during the rain and rain-free periodof the CSS. |
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