厦门湾砂质潮间带海底地下水排泄的非均质性研究  

A Study on the Heterogeneity of Submarine Groundwater Discharge in the Sandy Intertidal Zone of Xiamen Bay

作　　者：王志秀 郝奇琛 李亚松[2,3] 刘春雷 张媛静[2,3] WANG Zhi-xiu;HAO Qi-chen;LI Ya-song;LIU Chun-lei;ZHANG Yuan-jing(Hebei GEO University,Shijiazhuang 050031,China;Fujian Provincial Key Laboratory of Water Cycling and Eco-Geological Processes,Xiamen 361021,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China)

机构地区：[1]河北地质大学城市地质与工程学院,河北石家庄050031 [2]福建省水循环与生态地质过程重点实验室,福建厦门361021 [3]中国地质科学院水文地质环境地质研究所,河北石家庄050061

出　　处：《河北地质大学学报》2024年第1期72-77,共6页Journal of Hebei Geo University

基　　金：厦门自然科学基金项目(3502Z202373152);国家重点研发计划(2022YFF1301301)。

摘　　要：以厦门岛南岸砂质海岸为研究对象,通过监测潮间带渗出面处地下水盐度、近岸海水盐度,并分析潮间带盐度空间分布规律,以探究厦门湾海底地下水排泄(SGD)的非均质性。结果显示:1)潮间带地下水、海水盐度变化可以间接指示海底地下淡水排泄量(SFGD)。2)垂直于海岸线方向,由内陆向海洋地下水盐度呈现先降低后升高的规律;沿海岸线方向,整个潮滩地下水盐度分布不均匀,差异性较大,具有明显的非均质性。3)通过对潮间带中部最低盐度区域进行加密监测,圈定了厦门湾潮间带高渗透天窗范围,推测高渗透天窗对SFGD影响较大。4)通过对典型剖面地下水、近岸海水盐度动态监测,发现潮汐对潮间带SFGD产生一定影响。Taking the sandy coast on the southern of Xiamen Island as the research object,by monitoring the salinity of groundwater and coastal seawater at the intertidal seepage surface,and analyzing the spatial distribution of salinity in the intertidal zone,we aim to explore the heterogeneity of submarine groundwater discharge(SGD)in Xiamen Bay.Results display:1)The salinity of intertidal groundwater and seawater can indirectly indicate the submarine fresh groundwater discharge(SFGD).2)Perpendicular to the coastline,the salinity of groundwater decreases first and then increases from inland to ocean.In the coastal direction,the salinity distribution of the whole tidal flat is not uniform,the difference is large,and it has obvious heterogeneity.3)Through the monitoring of the lowest salinity area in the middle of the intertidal zone,the range of the high permeability skylight in the Xiamen Bay intertidal zone is defined.It is speculated that the high permeability skylight has a great influence on SFGD.4)Through the dynamic monitoring of the salinity of groundwater and coastal seawater in typical profiles,it is found that the tide has a certain influence on the intertidal SFGD.

关 键 词：厦门湾 海岸带 渗出面 地下水盐度 海底地下水排泄 非均质性 

分 类 号：P748[天文地球—海洋科学] P641.8