莱州湾南岸海底地下水交换量研究

Study on submarine groundwater exchange capacity in south Laizhou Bay

相对于定性研究海水入侵的程度及规律,定量研究能更直观的给出海水入侵地区的SGD(Submarine groundwater discharge)以及流入量。选择潍坊昌邑市北部潮间带地区,布设3km长监测剖面,通过监测地下水水位、水温、以及电导率数据,运用数学方法定量估算海底地下水交换量。同时,运用计算所得结果,对研究区海水入侵情况进行评估,为将来该地区地下水监测提供科学依据。计算结果表明,潮间带流入量明显大于流出量,海水呈现朝陆推进趋势。

Compared with the qualitative study of seawater intrusion,the quantitative study can give a more direct description of the submarine groundwater discharge and inflow in the seawater intrusion area.We set up a 3-km-long monitoring section in an intertidal zone located in the north of Changyi City of Weifang.According to the data of groundwater level,water temperature,and conductivity,we conducted a quantitative estimation of the submarine groundwater exchange capacity by mathematical methods.The results of the calculation were used to evaluate the trend of seawater intrusion in the study area,and to provide a scientific basis for future groundwater monitoring in the area.The results showed that the inflow in the intertidal zone was obviously larger than the outflow,so the sea water is showing a trend of landward intrusion.