Coastal zones are the most sensitive and vulnerable ecological environments in the world. Submarine groundwater discharge (SGD) is an important pathway for material transport between land and sea in the low-lying coastal plains of coastal zones. In the present study, electrical resistivity tomography was used to monitor submarine groundwater discharge in the intertidal zone. The salinity change ratio was derived using Archie's law and Manheim's equation, and was used as an index to describe the dynamic discharge process. A model of the seawater circulation process in the multilayer coastal aquifer system was established. The model contains a window area between the upper unconfined and lower confined aquifer, and a highly permeable channel in the upper silt layer. The results of the study provide a theoretical basis and technical support for the rapid assessment of SGD in low-lying coastal plains, and will assist in the management of coastal zone environments.

沿海地区是世界上最敏感，最脆弱的生态环境。海底地下水排放（SGD）是沿海地区低洼沿海平原陆地与海洋之间物质运输的重要途径。在本研究中，电阻层析成像技术用于监测潮间带海底地下水的排放。利用阿奇定律和曼海姆方程推导了盐度变化率，并将其作为描述动态放电过程的指标。建立了多层沿海含水层系统中海水循环过程的模型。该模型在上部无限制和下部受限含水层之间包含一个窗口区域，在上部淤泥层中具有高渗透性的通道。