海底地下水的开采在莱州湾东岸已是较为普遍的现象，其直接环境效应便是引起海水入侵过程的变化。本项目选择莱州湾东岸滨海平原及其附近海域为研究区，利用国外引进的现代化测井设备自动采集地下水水文特征数据，采取元素和同位素比率方法，分析海底地下咸水与内陆地下淡水和海水的关系，确定海底地下水的补给来源。利用“虚拟含水层”的方法，建立二维数学模型，模拟并揭示理想状态下海底地下水开采对海水入侵的影响机制和过程。在此基础上，考虑陆海多因素影响，特别是内陆含水层向海区延伸的海区边界条件处理以及咸水浓度处理，建立三维饱和介质、非稳定流和瞬变溶质迁移模型，模拟大尺度的海水入侵过程，揭示陆海相互作用影响下海水入侵的本质变化，以期促进目前海底地下水入海径流量（SGD）及其环境效应的研究。

Abstract

Submarine groundwater exploitation is now a very popular phenomenon along the east coast of Laizhou Bay, China, but it is not well known how this kind of human activities influence on the process of saltwater intrusion in the coastal aquifers. The purpose of this project is to promote the study of Submarine Groundwater Discharge (SGD) and its environmental effects by selecting the typical research area, which located in the eastern coast and its attached shallow sea in Laizhou Bay. The main items are planned in the follows:

1.   Survey and automatic groundwater data collecting by using the advanced well logging system induced from Australian.

2.   Confirm the recharging sources of the Submarine Groundwater and its hydraulic connections with other water bodies by the mean of element and uranium (U) series isotope methods (Ra226).

3.   Set up the “Virtue Aquifer” conception and 2-D numerical models to analog the process of saltwater intrusion under the perfect condition of pumping submarine salty groundwater.