河口与外海物质交换是决定近岸海洋环境状况的重要因子之一。水动力过程是物质输运的载体。已有的研究表明全球海平面上升会引起近岸水域水动力过程变化，其必然影响河口与外海的物质交换。本项目以珠江河口及其毗邻海域为研究对象，通过数值模拟的方法来研究在IPCC（联合国政府间气候变化专门委员会）预测的2100年海平面上升高度条件下该河口与外海物质交换过程的变化，用以开展海平面上升对南海北部珠江河口区域物质输运过程影响的动力学机制研究。本项目将引入海洋示踪物和物质输运时间尺度的概念对物质输运过程进行量化，拟得出物质输运过程变化与海平面上升幅度的对应关系。该研究结果将为海洋环境监测部门、近岸工程设施建设部门等制定相应的环境保护政策和积极有效的防御措施提供理论依据，来应对未来海平面加速上升对近岸环境可能所造成的影响。

The material transport between estuary and its adjacent coastal sea is one of the important factors that control the coastal sea environmental condition. Previous studies indicated that global sea-level rise can cause changes of hydrodynamic processes in coastal water, which will impact the material exchange between estuary and coastal sea. This project focuses on the Pearl River Estuary and its adjacent coastal sea. By using the numerical modeling method, we study the material exchange between Pearl River Estuary and coastal sea under the IPCC (Intergovernmental Panel on Climate Change) predicted sea-level rise in 2100 and aim to investigate the dynamic mechanism that controls the responses of the local material transport to the future sea level rise. The tracer and material transport timescale will be introduced in this project to quantify the material transport processes. The aim of this study is to obtain the correlation between sea-level rise and the changes of material transport processes. The results of this study will provide theoretical support for the local environmental agency and coastal engineering department to make positive and efficient policies to protect our environment and deal with the possible impact of accelerated sea-level rising on coastal environment.