Recent Morphological Evolution of Jiuduan Shoal and Its Effect on Navigation Channel Sedimentation of North Passage in Yangtze River Estuary
Recent Morphological Evolution of Jiuduan Shoal and Its Effect on Navigation Channel Sedimentation of North Passage in Yangtze River Estuary
复制标题
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Chen Hai-feng
中科院分区：
文献类型：
--
作者：
Chen Hai-feng
根据水文、泥沙和水下地形实测资料，分析了近10年来九段浅滩的演化过程和机制，以及对北航道航道沉积的影响。结果表明：JDS总体上呈现出长高不变大的特征，即：海拔0 m以上的高滩明显上升，而海拔2m和5m以上的低滩稳定。在二期深水航道工程中，JDS较高的滩头对南训练堤防泥沙的阻挡作用正在减弱，在一定的风浪条件下，JDS滩头面含沙量较高的上升潮流向NP中游泄流，增加了近年来NP航道泥沙淤积的来源。
On the basis of the field measurement data of hydrology,sediment and underwater topography,the evolutional process and mechanism of Jiuduan Shoal(JDS) in recent 10 years and its effect on navigation channel sedimentation of the North Passage(NP) are analyzed.The results are showed that JDS presents overall a feature of growing taller not bigger,i.e.the high shoal of elevation above 0 m is raising obviously,but the low shoal of elevation above 2m and 5m is stable.The higher beach of JDS is weakening its function of blocking sediment of South Training Dikes in the 2nd phase Deepwater Channel Project,and the rising tidal current with relatively higher sediment concentration on the beach face of JDS across South Training Dikes discharges into the middle reach of NP under certain condition of wind and waves,which would increase sediment sources of navigation channel sedimentation of NP in recent years.