长江河口南汇东滩与南滩沉积物空间相关特征分析

利用SVD分解技术,对南汇边滩两大地貌单元-南滩和东滩的沉积物空间分布特征和物质组成的关系进行了探讨,结果表明:(1)SVD可以用来诊断两个具有空间相互作用的沉积场遥相关特征;(2)南汇东滩没冒沙上端的沉积环境及相应的物质组成对南滩的沉积环境及物质组成有显著的影响,南滩的沉积物特别是粒级较粗的组分主要来源东滩;(3)南汇东滩铜沙咀区的沉积环境及物质组成与南汇咀区的沉积环境及物质组成具有正相关特征。

ANALYSIS ON THE SPATIAL DISTRIBUTION OF DEPOSITION FIELDS BETWEEN THE EAST BANK AND THE SOUTH BANK, IN THE CHANGJIANG RIVER ESTUARY

The relationship of the spatial distribution of deposition fields between the east bank and the south bank in Changjiang River is studied by using singular value decomposition method.The results show that(1) there is meaningful and efficient for the using of SVD to diagnose and analyze the remote correlated characteristics of the spatial interaction between two deposition fields;(2) the depositional environment and correspondent composition of deposition in the upper of Meimaosha tidal ridge in the East Bank has strong influence on the depositional environment and correspondent composition in the South Bank,especially to the source of coarse sediment in South Bank from the East Bank;(3) there is a positive correlated relationship of the depositional environment and correspondent composition of deposition between Tongshazui area in the East Bank and Nan Huizui area.