中文摘要：

晚更新世以来莱州湾南岸发生了三次海侵,长期的蒸发浓缩作用形成了大范围的地下卤水.受地下淡水过量开采、卤水资源利用及围填海工程等综合因素影响,地下咸水区的地下水流场、水质及周边地质环境产生了改变.选择地下咸水区进行地下水流示踪试验,对地下咸水渗透流速及影响范围等进行探索性试验研究.以粉砂、粘土质粉砂为主的咸水入侵区具有相对统一的地下水流场,示踪剂浓度变化基本符合正态曲线分布.在地下咸水区,示踪剂在随着地下水流运动时,示踪试验相对抽水试验具有速度放大效应.本次试验中,地下水流速0.25～0.38m/d,示踪剂流速0.36～1.09m/d,示踪剂流速是达西流速的2.1倍.

英文摘要：

As one of the most serious saltwater intrusion in the muddy coast of China, the saline groundwater resources in the south coast of the Laizhou Bay are abundant owing to three transgression layers since the Late Pleistocene. The saltwater intrusion layers occur at a depth of less than 80 m of the confined aquifer and the upper shallow aquifer. A tracer method is used to explore the dispersion effect, calculate the penetration velocity and investigate the transformation range of the pollutants labeled by Rhodamine in the saltwater aquifers. According to our analyses, the confined aquifers with silt or clayey silt have uniform groundwater flow, and the change in tracer concentration generally follows the normal distribution. In the salt-water area, the tracer test has an amplification effect on velocity when tracer moves along the groundwater flow. In this test, the groundwater flow velocity ranges from 0. 25 to 0.38 m/s, the tracer flow velocity varies between 0. 36 and 1.09 m/d, the average tracer flow velocity is 0.61 m/d, and the average Darcy flow velocity is 0.29 m/ d. The velocity of tracer flow is 2. 1 times that of the Darcy flow.