摘要
该文结合大量长时间序列水下地形资料和近期水文泥沙资料,论述了废黄河三角洲的侵蚀过程、机制及近期动态;具体分析了滨海港区水下岸坡的侵蚀形态以及滨海港区10万t级航道工程对海岸稳定性的影响。研究表明,大浪作用对废黄河三角洲海岸侵蚀起控制作用,经1个多世纪的侵蚀,尽管其岸线仍向海凸出,但完整的水下三角洲形态已不复存在,近期侵蚀动态表现为水下岸坡的侵蚀陡坡整体内移,侵蚀速率已明显趋缓。拟建航道工程岸段岸线有效防护后,其稳定的水下岸坡坡度约1∶85。航道工程的拦沙堤可拦截近岸粗化层泥沙,减轻或阻止堤前滩面进一步下蚀,对海岸防护具有积极作用。滨海港10万t级航道的淤积主要为悬沙淤积,淤积强度相对较大的区域主要在内航道的近口门段及口外挖深相对较大区段。
In this paper, long time series data and new topography, hydrologic and sediment data were used to further discuss the erosion proeess,mechanisms and recent development at the the Abandoned Yellow River Delta（AYRD）, which includes the detailed analysis of the coastal slope erosion patterns in Binhai Harbour （BH）and the influence of 100000 ton Deep Waterway Projeet（DWP）on its stability. Studies indicates that big waves play a key role in coastal erosion process at the AYRD,and after almost a century,though the shoreline is still protruding towards the sea,a complete underwater delta form has no longer existed. Recently, such erosion whose rate has slowed down, is represented by the integral shift of the eroded underwater slope towards the land. The stable underwater slope gradient will be about l：85,after effective methods on the defense of shoreline where the proposed project will be constructed are taken.The construction of jetty,applied to impede the coarsening sediment layer,has a positive effect on coastal protection, mitigating or preventing the further erosion on the beach. The deposition at DWP at BH is mainly the siltation of suspended sediment,with relative large siltation at the mouth of the inner channel and out channel near the estuary where the dredging depth is large.
出处
《现代交通技术》
2011年第6期87-91,共5页
Modern Transportation Technology
关键词
航道工程
滨海港区
海岸稳定性
泥沙淤积
waterway engineering
Binhai harbour
coastal stability
sediment deposition
