毛里塔尼亚友谊港上下游岸线演变模拟及预测

发布时间：2018-06-23 03:05

本文选题：友谊港 + 沿岸输沙　；参考：《海洋工程》2017年04期

【摘要】：毛里塔尼亚友谊港处于典型的强沿岸输沙型沙质海岸,年平均沿岸输沙量为90×10~4~100×10~4m~3。由于防波堤工程对上游沿岸输沙的拦截,港区岸线冲淤变化强烈。根据实测资料分析,采用基于"一线理论"的岸线演变数学模型,对友谊港上下游岸线变化作了整体验证,统筹分析了港口工程对上游淤积和下游冲刷的影响。在此基础上,进一步预测了友谊港未来20年的岸线变化情况。结果表明,在港区现有建筑物布置情况下,下游岸线的大幅冲刷将危及陆域土堤的安全,是友谊港未来防护的重点之一。若考虑每隔一定年限在下游增建丁坝工程,形成丁坝群护岸工程,可延长下游岸线的冲刷防护范围,减小对陆域建筑物的威胁。
[Abstract]:The Friendship Port of Mauritania is located on the typical strong coastal sand transport type sandy coast. The annual average coastal sediment transport capacity is 90 脳 10 ~ (4) ~ 100 脳 10 ~ (4) m ~ (-1) m ~ (3). Due to the interception of upstream coastal sediment transport by breakwater engineering, the erosion and siltation along the shoreline in the port area change strongly. Based on the analysis of measured data and the mathematical model of shoreline evolution based on "first-line theory", the changes of upstream and downstream shoreline of friendship port are verified as a whole, and the influence of port engineering on upstream siltation and downstream scour is analyzed as a whole. On this basis, the changes of the coastline of Friendship Port in the next 20 years are further predicted. The results show that under the situation of the existing buildings in the port area, the large scour of the downstream shoreline will endanger the safety of the earthen embankment in the land area, and is one of the key points for the future protection of the friendship port. If we consider the construction of groyne projects in the lower reaches every certain number of years to form the dike group revetment works, the scour protection range of the downstream shoreline can be extended and the threat to the buildings in the land area can be reduced.
【作者单位】：南京水利科学研究院水文水资源与水利工程科学国家重点实验室;河海大学港口海岸与近海工程学院;
【分类号】：TV148

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