基于动力条件改变的笔架山连岛坝侵蚀原因分析  

Cause Analysis of the Bijiashan Tombolo Erosion Based on the Changes of Dynamic Conditions

作　　者：孙家文[1,2] 张子鹏[1] 于永海[1] 孙昭晨[2] 梁书秀[2] 索安宁[1] 

机构地区：[1]国家海洋环境监测中心国家海洋局海域管理与技术重点实验室,辽宁大连116023 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《海岸工程》2014年第4期1-13,共13页Coastal Engineering

基　　金：国家海洋局公益性行业科研专项--近岸海域空间整治效果与开发存量评估关键技术研究应用(201405025);国家自然科学基金--区域海岸景观格局变化的海洋冲淤环境影响机制(41376120);国家海洋局海域管理重点实验室资助项目--岬湾砂质海岸修复平面规划设计关键技术研究(201304)

摘　　要：利用MIKE21软件的波浪谱模型及潮流模型对辽宁锦州大笔架山岛连岛坝海域的波浪、潮流等水动力条件进行了数值计算,并对锦州港建设前后的动力条件变化进行了分析。结果表明:锦州港的建设完全阻断了偏西向波浪对连岛坝的塑造作用,坝体的侵蚀确系单侧(偏东向)波浪作用的结果,坝体局部侵蚀严重区域形成四处明显的潮沟,潮沟处流速增大,加剧了对坝体的侵蚀。Dynamic conditions such as waves and tidal currents in the sea area around the Bijiashan tombolo, which is in Jinzhou city, Liaoning province, are calculated by using the wave spectrum model and the tidal current model of MIKE21 software, and the changes of dynamic conditions before and after the construction of the Jinzhou Port are also analyzed. The results show that the construction of the Jinzhou Port has completely blocked the shaping role of the westward waves to the tombolo and the erosion of the tombolo is indeed a result from the unilateral （eastward） wave action. In the local areas around the tombolo where the erosion is serious, four distinct tidal creeks are formed. Because the current velocity increases in the creeks, the erosion of the tombolo is intensified.

关 键 词：连岛坝 侵蚀 动力条件 

分 类 号：P736[天文地球—海洋地质]