在渤海湾海岸带地区选取沉积环境稳定、沉积速率较低的站位，通过挖取人工探坑进行侧壁高分辨率连续取样（并辅以Eijkelkamp槽型取样器获取无扰动岩心样品），对样品进行210Pb、137Cs、241Am和239+234Pu比活度测试、粒度分析，定量重建210Pb、137Cs和239+234Pu在该区的沉积历史，与该区已经发表的实测比活度?深度剖面进行对比研究，建立接近大气沉降的210Pb、137Cs和239+234Pu比活度?深度参考剖面，为现代沉积物测年技术在海岸带地区的应用和研究提供参考，本研究方案具有推广性。

The undisturbed and high resolution samples will be recovered from relative stable and low sedimentation rates environments of Bohai Bay by digging artificial pit (with Eijkelkamp corer), and the activity of 210Pb, 137Cs, 241Am, 239+234Pu and the grain size will be measured, in order to reconstruct the sedimentary history of 210Pb, 137Cs and 239+234Pu; Moreover, comparison between these datas and the profiles collected will be taken, with the objective of constructing a reference profiles of 210Pb、137Cs and 239+234Pu that closed atmosphere fallout. These can be a good reference for the study and application of modern sediments dating technology on coastal area, and this program can be used on other area.