| 江苏大丰潮间带粉砂滩的潮流边界层特征 |
| |
| 引用本文： | 李占海,高抒,柯贤坤,汪亚平.江苏大丰潮间带粉砂滩的潮流边界层特征[J].海洋通报,2003,22(2):1-8. |
| |
| 作者姓名： | 李占海 高抒 柯贤坤 汪亚平 |
| |
| 作者单位： | 南京大学海岸与海岛开发教育部重点实验室,江苏,南京,210093 |
| |
| 基金项目： | 国家自然科学基金（49976026）资助 |
| |
| 摘 要： | 对江苏大丰潮间带粉砂滩的潮流观测数据，运用Karman-parndtl模型分析了流速对数剖面的出现频率和边界层参数（摩阻流速与粗糙长度）。结果表明，不同时间尺度（10^1-10^3s）的平均流速对计算u-lnz线性关系出现频率的影响不大，而不同层位组合的影响较为显著，影响流速对数剖面分布的自然因素为波浪、风、潮流旋转、表底层流向差异、滩面坡度和水流加减速等。相邻层位的流速在时间序列上存在很高的线性关系，回归直线的斜率与水层距底床的高度、粗糙长度和摩阻流速有关。涨潮阶段床面粗糙长度大于落潮阶段，涨潮阶段摩阻流速小于落潮阶段。
|
| 关 键 词： | 潮滩 潮流边界层 流速剖面 江苏海岸 |
| 文章编号： | 1001-6392(2003)02-0001-08 |
| 修稿时间： | 2002年3月25日 |
Tidally-induced Boundary Layer Properties of the Silt Flat at Dafeng,Jiangsu Province, Eastern China |
| |
| LI Zhanhai,GAO Shu,KE Xiankun,WANG Yaping.Tidally-induced Boundary Layer Properties of the Silt Flat at Dafeng,Jiangsu Province, Eastern China[J].Marine Science Bulletin,2003,22(2):1-8. |
| |
| Authors: | LI Zhanhai GAO Shu KE Xiankun WANG Yaping |
| |
| Abstract: | Tidally-induced boundary layer properties of the silt flat at Dafeng, Jiangsu Province, are studied by using the Karman-Prandtl Equation. The results show that the number and distribution of measured layers, but not the current velocities on different temporal scales have a remarked influence on the occurrence of logarithmic velocity profiles. Furthermore, wind waves, bed slope, current direction and acceleration and deceleration play an important role in the occurrence of logarithmic profile. A linear correlation exists between the current speed of adjacent layers, and the correlation is dependent on the height of the layer above the seabed, roughness length and shear velocity. Roughness length during the flood phase is larger than that during the ebb phase, whilst shear velocity during the flood phase is smaller than that during the ebb phase. |
| |
| Keywords: | tidal flat tidally-induced boundary layer current velocity profile Jiangsu coast |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
