基于砂质海岸带的咸淡水界面形成及运移过程探析

Analysis on Formation and Migration Process of Brackish-fresh Water Interface based on Sandy Coastal Zone

近年来,沿海城市的海水入侵变得越来越严重。为了防止海水入侵,根据砂槽物理模型进行试验就显得尤为重要,文章以龙口市为例,由于研究区两侧都被大海包围,因此可以将黄河东侧和南侧的边界河用作已知的水流边界,而南侧则是低山丘陵区。它被视为一个独立的水文地质个体,北侧的地下水主要用于开采用于工业生产,而西海岸的地下水开采主要被用于农业生产,开采大量地下水从而导致漏斗的形成,由于海水沿水力梯度侵入,两岸的地下水都被咸化。因此,把龙口市作为由于地下水超采导致海水入侵的典型地区,并进行了试验分析,仅供相关部门参考。

In recent years,seawater intrusion in coastal cities has become more and more serious.In order to prevent seawater intrusion,it is particularly important to test according to the seawater intrusion model.Taking Longkou City as an example,since the study area is surrounded by the sea on both sides,the boundary rivers on the east and south sides of the Yellow River can be used as the known flow boundary,while the south side is the low hilly area.It is regarded as a separate hydrogeological entity,and the groundwater on the north side is mainly exploited for industrial production,however,groundwater extraction on the West Coast is mainly used for agriculture,the exploitation of large quantities of groundwater leads to the formation of funnels.Groundwater on both banks has been salted due to the intrusion of seawater along hydraulic gradients,Therefore,Longkou City is regarded as a typical area of seawater intrusion caused by overextraction of groundwater,and the experimental analysis is carried out,which is only for reference of relevant departments.