摘要
运用ECOMSED三维数值模型研究了岸线变化对连云港港口海域水交换的影响,得出了港域典型位置水质点的Lagrange轨迹和水体的半交换期。结果表明,岸线变化后,港域流速变小,受南、北防波堤的束水作用,口门附近流速增大,丁坝内侧流速减缓,北防波堤内侧和旗台港区延伸段东南角的局部水域在涨潮过程中形成旋流区。质点追踪结果显示,港域水质点具有向湾顶方向运移的趋势,运移距离总体变小,一个潮周期内港域中部附近水质点已很难运移到口门以外海域。岸线变化前后水交换半周期分别为31.8个潮周期和39.3个潮周期。
The water exchange in Lianyungang port adjacent waters affected by shoreline change was stud- ied using the three-dimensional numerical model ECOMSED. The Lagrange particle tracking at typical po- sitions and half-life time of water exchange were obtained. Results show that the velocity of tidal current inside the port decreases after the shoreline change, while the velocity close to the harbor entrance increa- ses owing to the south and the north breakwaters. The current of the inner spur dike become slow, and ro- tating currents are formed in the inner side of the north breakwater and to the southeast of Qitai port dur- ing flood tide. The water particles inside the harbor tend to diffuse to the top of the bay, and the transport distance generally decrease, making it difficult for the water particles to diffuse to the outside of the harbor within a tidal cycle. The half-life time of water exchange before and after the shoreline change are 31.8 and 39.3 tidal cycles, respectively.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2015年第1期31-37,共7页
Advances in Marine Science
基金
江苏省海洋资源开发研究院开放课题基金--岸线变化对港口海域水沙交换的影响研究(JSIMR201331)
关键词
岸线变化
水交换
港口海域
连云港
shoreline change
water exchange
port adjacent area
Lianyungang
