长江口横沙浅滩挖入式港池与入海航道区域海床稳定性分析  

Morphological stability analysis of the planned excavated-in harbor and its channel in the Hengsha Shoal of the Yangtze Estuary

作　　者：虞志英[1] 张志林 金鏐[3] 徐海根[1] 李身铎[1] 

机构地区：[1]华东师范大学河口海岸学国家重点实验室,上海200062 [2]长江水利委员会长江口水文水资源勘测局,上海200213 [3]交通运输部长江口航道管理局,上海200003

出　　处：《华东师范大学学报（自然科学版）》2013年第4期55-71,共17页Journal of East China Normal University(Natural Science)

基　　金：华东师范大学河口海岸学国家重点实验室自主课题

摘　　要：提议中的横沙浅滩挖入式港池和入海航道区域位于长江口北港和北槽之间的横沙浅滩以及长江口外的水下三角洲海域.长江河口长期以来承受数亿万吨计流域来沙在河口区的堆积,发育了巨大的陆上和水下三角洲,横沙浅滩则是与崇明东滩、九段沙同为长江河口拦门沙地区的三大浅滩之一,长期以来位置和海床均十分稳定,是建设挖入式港池的理想区域.长江水下三角洲形成历史悠久,地形平坦,以三角洲沉积为主.随着近年来长江来沙量的逐渐减少,使长年来地形变幅甚小,对深水航道建设提供了有利的稳定环境.本文主要从海床稳定性的角度,对海床演变环境及演变趋势作出分析研究,为在长江口建设深水港提供参考.The proposed excavated-in harbor and shipping channel are located in the adjacent re- gion of Hengsha Shoal in the outer Changjiang River mouth. Accumulation of huge amount of sediment from the upstream Changjiang River oecurs in the river mouth, resulted in the large delta area on both land and submarine. Hengsha Shoal is recognized as one of the three largest shallow shoals, with Chongming East Shoal and Jiuduansha Shoal in the sandbar region of Changjiang River mouth. It shows stable location and bathymetry pattern in the long-term history, which indicates it＇s an excellent location for a new harbor. During its long history of the sub- marine delta, the bathymetry is mainly flat and under the deposition effect of delta. With the re cent deceasing of the sediment load from the Changjiang River, there is small evolution of the ba- thymetry. This is favorable for construction of the shipping channel into excavated-in harbor. This paper mainly focuses on the morphological stability of the bathymetry and its evolution trend, to provide some basic support for the new deep harbor.

关 键 词：挖入式港池 横沙浅滩 海床稳定性 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]