地下水位变化在分析海水入侵中的应用

Application of the change groundwater level in analysing seawater intrusion

基于同期的外海潮位与S-1监测井电导率监测数据,对辽东湾西侧绥中砂质平原海水入侵岸段的外海潮位对海水入侵的影响进行了分析。结果表明外海潮位的变化可以对海水严重入侵区域的S-1监测井附近产生显著的影响,高潮位时会导致该地区海水入侵程度加重。基于实测的过渡区地下水位与Cl-含量数据,得出季节变化的地下水位与季节变化的地下水Cl-含量呈现明显的正相关关系,相关系数在0.92以上。利用该相关关系,可以得出该地区的海水入侵过渡区(250 mg/L)对应的地下水位值为-2.22 m^0.25 m,可以为确立该地区海水入侵过渡断面的位置提供间接的依据和参考。

Based on the monitoring data of sea tide level and electric conductivity of S-1 well during the same period, the influence of sea tide level on seawater intrusion in Suizhong sandy plain of the west of Liaodong Bay was analyzed. The results show that the change of sea tide level has a noticeable effect on the area with heavy seawater intrusion nearby the S-1 well and the extent of seawater intrusion will increase during high sea tide period. Based on the field monitoring data about groundwater level and C1- content in seawater intrusion transition region, it shows a significant positive correlation between the groundwater level and C1- content with various seasons and the correlation coefficient is above O. 92. Making use of the relationship, we could found that the range of groundwater level in seawater intrusion transition region is between - 2.22 m and O. 25 m in this area, which could provide indirect basis and reference on es- tablishing the seawater intrusion section.