文献类型：期刊文献

中文题名：华南滨海火山岛地下水动态对海潮的响应特征

英文题名：Response Characteristics of Groundwater Dynamics to Ocean Tide in Volcanic Island of South China

作者：曾港[1];陈建耀[1];董林垚[2,3];李绍恒[1];金广哲[4];吴瑞钦[5];付丛生[6]

机构：[1]中山大学地理科学与规划学院,广东广州510275;[2]长江水利委员会长江科学院,湖北武汉430010;[3]水利部山洪地质灾害防治工程技术研究中心,湖北武汉430010;[4]广东海洋大学海洋与气象学院,广东湛江524088;[5]广东省水文局湛江水文分局,广东湛江524043;[6]中国科学院南京地理与湖泊研究所,江苏南京210008

年份：2025

卷号：50

期号：5

起止页码：2072

中文期刊名：地球科学

外文期刊名：Earth Science

收录：北大核心2023、、北大核心

基金：国家自然科学基金项目(Nos.41977171,41771027);广东省水利厅水利科技创新项目(No.2020-09);广东省自然资源厅地下水资源调查监测评价项目(No.0835-210Z22803141).

语种：中文

中文关键词：地下水;火山岛;功率谱分析;小波分析;互相关分析;水动力响应;水文地质.

外文关键词：groundwater;volcanic island;power spectrum analysis;wavelet analysis;cross-correlation analysis;hydrodynamic response;hydrogeology

中文摘要：海潮是驱动地下水动态变化的动力基础,为探讨海潮对广东省硇洲岛地下水动态的影响,以地下水位和盐分作为主要指标,采用功率图谱分析地下水动态相对潮汐的频率特征,结合小波变换和互相关方法分析地下水动态的振幅和位相特征.结果表明:(1)硇洲岛海潮对地下水位的水平影响距离约为400~500 m.(2)离海距离、含水层特性是影响地下水对海潮响应的主要因素.(3)硇洲岛西北侧近海第四纪中砂层中存在海水进入地下淡水的通道,当含水层对海潮的水动力响应好且存在联系海水的通道时,海水盐分更易传输到地下淡水中.地下水动态对海潮的响应分析可以有效识别海潮的影响范围,从而为岛屿或近岸地下水咸化现象提供重要依据.

外文摘要：Ocean tide is the dynamic basis driving the hydrodynamic changes of groundwater.In order to explore the influence of ocean tide on the groundwater dynamics in Naozhou Island,Guangdong Province,the groundwater level and salinity were used as the main indicators,and the frequency characteristics of groundwater dynamics relative to tides were analyzed by power spectrum.Moreover,the amplitude and phase of groundwater dynamics were analyzed by combining wavelet transform and crosscorrelation methods.The results show follows:(1)The response of groundwater to tidal loading has a certain spatial range.The horizontal influence of ocean tide on the groundwater level in Naozhou Island is about 400-500 m.(2)The distance from the sea and the aquifer properties are the main factors affecting the hydrodynamic response to the tide.(3)The channel connecting groundwater and seawater in Naozhou Island is distributed in the Quaternary medium sand layer.When the aquifer has a good hydrodynamic response to the tide and good connectivity with seawater,the seawater salt is more easily transmitted to the groundwater.The response analysis of groundwater dynamics to ocean tides can identify the influence range of ocean tides effectively,providing an important basis for the salinity phenomenon of groundwater in the island or nearshore areas.