岬间海湾岬角形状变化对岸线演化的影响研究  

Study on Shoreline Evolution Caused by Change of Cape Shape of Headland-Bay

作　　者：李安龙[1] 季祥坤 郭席君 沈昆明 LI An-Long;JI Xiang-Kun;GUO Xi-Jun;SHEN Kun-Ming(The Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China)

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,海洋地球科学学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2020年第11期81-86,共6页Periodical of Ocean University of China

基　　金：国家重点研究发展计划项目(2017YFC0405502)资助。

摘　　要：海岸的稳定性对沿岸基础设施的布局有重要的影响。基于历史卫星影像资料解译和实地调查,本文分析了青岛董家口至日照任家台岸段海湾岬角形状改变对湾内岸线变迁的影响。研究结果表明:岬角形状改变对沙质岸线过渡段的影响最大,对切线段次之。岬角形状改变过程中,工程建设导致岬角处海底的泥沙被大量扰动,在SW向沿岸流作用下向湾内辐散,导致切线段泥沙沉积量增加,侵蚀速率降低。岬角形状改变完成后,在NE向波致沿岸流的作用下加强,泥沙向北输送加强,切线段北侧海岸侵蚀加强速率增加,过渡段淤积速率增加。目前黄家塘岬湾内切线段北段海岸仍未形成新的动力平衡,海岸侵蚀可能后退9.7 m后达到稳定。湾内岸线发生变迁的动力机制来源于湾内切线段波生沿岸流增强。The stability of the coast play an important role on the layout of coastal infrastructure.Based on the interpretation of historical satellite image data and field investigation,this paper analyzes the coastline change caused by the breakwater construction in the headland bay Cape in Qingdao Huangjiatang Bay.The results show that there are some influence on the transition section and tangent section of headland-bay by construction of breakwater in Cape.During engineering construction the sediment on the sea floor at the Cape was disturbed and redepositinto the Bayunder the action of SW coastal flow,resulting in the increase of sediment deposition and the decrease of erosion rate at the tangent line.After the breakwater construction completion,the coastal erosion in the north ern side of the tangent line and the sediment transport to the north increased under the action of NE wave induced coastal current,and the deposition in the transition section is increased too.At present,the new dynamic balance in the northern section of huangjiatang headland Bay is not formed yet,and the coastal erosion will ceaseuntil coastline retreating 9.7 m.The dynamic mechanism of shoreline change in the Bay comes from the enhancement of wave-induced current in the tangent section of the bay.

关 键 词：岬间海湾 岬角 工程建设 岸线 响应 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]