中文摘要：

采集了青岛市胶州大沽河下游咸水入侵区砂样．以及大沽河河水、李哥庄镇当地居民饮用地下淡水和雨水。通过室内土柱驱替实验，对不同类型的淡水驱替咸水的过程中含水介质的渗透性变化规律进行了研究。结果表明，淡水驱替咸水的过程中，多孔介质渗透性均发生突变．不同类型的淡水驱替咸水时含水介质渗透性降低程度不同：河水驱替海水时渗透性降低幅度最大，降低了66％；雨水驱替过程中渗透性降低幅度为46．2％；地下水驱替过程中渗透性降低幅度较小，降幅为17．5％。说明天然条件下的驱替不能达到防治海水入侵的目的，选择大沽河河水回灌效果会更好．可以为海水入侵治理中驱替水质的选择提供科学依据。

英文摘要：

Water from the Dagu River, local residents drinking fresh groundwater, rainwater and sand samples from the saline water instrusion zone were collected to conduct the column experiments. The permeability of the porous media were all suddenly decreased in different types of salt-freshwater displacement process though the permeability decreasing degrees varied. In the process of river water flooding the seawater, the permeability decreased by 66%, while the number was 46.2% in the rainwater experiment and 17.5% in the groundwater experiment. The results show that the method of artificial recharge of water from Dagu River is better than salt-freshwater displacement un der natural conditions and can provide a scientific basis for the choice of water quality in preventing seawater intrusion.