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测出了沉积物中~(210)Pb含量的垂直分布,与典型的沉积物~(210)Pb分布曲线对比,发现该区的~(210)Pb的垂直分布出现了三种异常分布,垂直均匀异常、正(偏大)异常、负(偏小)异常。这三种异常与该区近百年发生的台风、洪水、地震事件有对应关系。台风对近岸沉积物进行混扰,使~(210)Pb在某段沉积物呈均匀值。珠江特大洪水使沉积物搬运,使得几个站位的沉积物的相同层位出现正、正或正、负的异常组合。地震也可能使~(210)Pb产生负异常。从而通过~(210)Pb的研究可以提供环境近百年的有价值的资料,对近海工程和海底工程建设有实用的价值。
The vertical distribution of ~ (210) Pb in the sediment was measured. Compared with the typical 210 Pb distribution curve, it was found that the vertical distribution of ~ 210 Pb in the area showed three anomalous distributions. The vertical Unusual, positive (large) abnormal, negative (small) abnormalities. These three anomalies have a corresponding relationship with the typhoon, flood and earthquake events occurring in the past century. Typhoon disturbed the sediments near the shore, making ~ (210) Pb a uniform value in some sediments. Floods in the Pearl River moved the sediments so that positive, positive or positive and negative anomalous combinations occurred in the same layers of sediments at several stations. Earthquakes may also cause ~ (210) Pb negative anomalies. Therefore, the study of ~ (210) Pb can provide valuable information about the environment for nearly one hundred years and has practical value for offshore engineering and subsea engineering construction.