在“地质—气候—环境”多因素影响下，海岸带形成了水质类型丰富、演化过程复杂的地下水环境，摸清地下水水盐补给过程是至关重要的。本项目以滦河冲积扇—三角洲地下水为研究对象，基于传统水文地质学、水文地球化学和沉积学等基础学科，选择2H、18O、14C和dexcess等环境同位素作为古气候因子，联合水化学和数值模拟等技术方法，提取储存于地下水中的古气候信息，建立3万年以来的地下水古气候档案，分析其与全球气候变化和沉积环境的响应关系；明确在末次冰期以来冰期、间冰期的地下水水盐补给组成，估算不同补给源的贡献程度；综合分析末次冰期以来滦河冲积扇—三角洲地下水水盐补给过程。本项目成果能够丰富海岸带水文地质环境领域的研究，为充分理解海岸带地下水演化提供理论支撑，有效的补充海岸带地下水古气候档案。

Under the influence of multiple factors of "geology, climate and environment", groundwater environment with rich water quality types and complex evolution process have formed. It is very important to understand the process of water and salt recharge to groundwater. Groundwater in Luanhe River Alluvial fan-Delta is as the research object in this project. Hydrogeology, hydrogeochemistry and sedimentology are the basic discipline. 2H, 18O, 14C, dexcess and other environmental isotopes are chosen as the palaeoclimate factor. Combined of hydrochemistry and numerical simulation, palaeoclimate information stored in groundwater was extracted. Palaeoclimate archives of groundwater are established for 30 ka B.P. The response relationship with Palaeoclimate archives of groundwater amd paleoclimate change and sedimentary environment is analyzed. The water and salt supply composition of groundwater in glacial and interglacial periods since the last glacial period was determined. Contribution of different supply sources was estimated . At last, the salt and water replenishment process of groundwater in LuanheRiver Alluvial fan-Delta since the last glacial period is comprehensively analyzed. The research results can enrich the research in the field of coastal hydrogeological environment and provide support for fully understanding the evolution of coastal groundwater. It provides a theoretical reference for the study on the adaptability of groundwater to climate change. And it can replenish paleoclimate archives of coastal groundwater.