摘要
南黄海辐射沙洲区水道及其之间的沙洲普遍存在逐渐向南偏移的趋势,对这种趋势性演变机理及驱动力的认识成为辐射沙洲区海岸开发过程中亟待解决的问题。在恢复黄河北归以来苏北黄河三角洲海岸不同发育阶段的岸线位置和水下地形的基础之上,通过所建立的潮波数学模型,研究了在苏北黄河三角洲不同演变阶段南黄海潮波系统的特征及其变化。研究表明,随着岸线后退和水下三角洲的夷平,辐射沙洲地区潮差不断增大;水动力不断加强,而且加强的区域逐渐向南偏移,这种大范围区域性水动力主轴的向南偏移有可能是导致辐射沙洲整体南移的主导因素之一。
The recent studies show that the water channels and sandbanks in radial sandbank of South Yellow Sea（SYS） have been gradually migrating southward.Hydrodynamic analysis on the mechanism of such evolvement trends is thus crucial for the regional development in the coastal zones of Northern Jiangsu province.In this study,the staged evolution of coastlines and seabed topographies since the northern retrieval of the Yellow River estuary is first studied,and a numerical tidal wave model is then established to investigate the hydrodynamic characteristics of the tidal wave system in SYS and evolutions of the Yellow River delta in the different stages.The results show that because of the coastal zone erosions and vanishing of the delta formed by the abandoned Yellow River estuary in Northern Jiangsu province,both tidal elevation and hydrodynamic condition in radial sandbank of SYS have been strengthened,and the strengthened regions are found to be gradually migrating southward.The large-scale southward regional reinforcement of dynamic axis of flow is likely to be one of the major contributing factors causing the entire sandbar regions of SYS migrating southward.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2010年第2期267-273,共7页
Advances in Water Science
基金
国家自然科学基金资助项目(40706034)
南京水利科学研究院青年基金(Y209004)~~
关键词
辐射沙洲
废黄河三角洲
岸线变迁
数值模拟
江苏海岸
radial sandbank
abandoned Yellow River delta
coastline change
numerical model
coastal zones of Jiangsu province
