利用^(210)Pb测年法探讨临海工程建设对厦门同安湾沉积速率的影响

^(210)Pb CHRONOLOGY STUDIES ON THE INFLUENCES OF NEARSHORE ENGINEERING CONSTRUCTION ON SEDIMENTATION RATES IN TONGAN BAY

采用铅-210地质年代学方法分析了厦门同安湾自高集海堤及其它临海工程兴建以来的淤积现象。结果表明:陆续的临海工程兴建,尤其是高集海堤修建,海湾水动力条件明显变化,致使整个海湾基本上处于接受沉积状况;沉积速率明显增加;近海堤主航道的淤积超过了海湾东、西、南三侧岸滩。

210Pb chronological technique was employed in the analysis of the silta-tion phenomenon in Tongan Bay. The sedimentation rates in the Bay were found to be increased significantly by the nearshore engineering construction, especially the Gaoqi-Jimei Causeway, due to the changes in hydrodynami-cal conditions.