A Study on the Heterogeneity of Submarine Groundwater Discharge in the Sandy Intertidal Zone of Xiamen Bay
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.
国家科技期刊平台
NSTL
万方数据
维普
