...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oceanographic Literature Review >Nearshore dynamics
【24h】

Nearshore dynamics

机译：近岸动力学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Hydrodynamics, sediment suspension, and morphological response on an estuarine intertidal sand flat in Tokyo Bay, Japan, are examined through a field experiment performed for 16 days in winter 2000 and using a bathymetry data set based on a 6-year series of surveys. Topography of the sandy flat was found to fluctuate by approximately 8 cm during the deployment, while the long-term accumulation rate is estimated with the surveyed bathymetries to be only 3.8 cm/y. Cross-spectral analysis of the measured data indicates that on the sandy tidal flat, semidiurnal or shorter-period fluctuations in current velocity are mostly attributed to semidiurnal tides and waves, whereas wind above the sea generally drives diurnal or longer-period fluctuations. The field data also confirm that suspended sediment concentrations were highly correlated with bed shear stress, which is generated by combination of tidal current, wind-induced current, and wind waves. Episodic erosion is observed on the sandy flat with high turbidities on ebbing phases. Erosion evidently occurs at phases between the high slack and the mean tidal levels during ebb flows when combined tidal, wind-driven, and wave-driven currents are maximized.
机译：通过对2000年冬季进行的为期16天的野外实验，并使用基于6年系列调查的水深测量数据集，对日本东京湾河口潮间带滩涂的水动力，沉积物悬浮和形态响应进行了研究。发现沙质平面的地形在展开过程中波动了约8 cm，而据调查的水深估计长期堆积率仅为3.8 cm / y。实测数据的互谱分析表明，在沙质滩涂上，半日或短期周期的流速波动主要归因于半日潮和波浪，而海平面上的风通常会导致昼夜或较长周期的波动。现场数据还证实，悬浮的沉积物浓度与河床切应力高度相关，河床切应力是由潮流，风感应电流和风波共同产生的。在沙质滩上观察到了阵发性侵蚀，在退潮阶段浊度很高。当潮汐，风和波浪驱动的联合电流最大化时，侵蚀显然发生在退潮期间高松弛度和平均潮汐水平之间的阶段。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号