...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Modeling hydrodynamics of large lagoons: Insights from the Albemarle-Pamlico Estuarine System
【24h】

Modeling hydrodynamics of large lagoons: Insights from the Albemarle-Pamlico Estuarine System

机译：大型泻湖的水动力学建模：Albemarle-Pamlico河口系统的见解

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

Large estuaries are influenced by winds over adjacent coastal ocean and land areas causing significant spatial variations in water levels, currents and surface waves. In this study we apply a numerical model to simulate hydrodynamics and waves in the Albemarle-Pamlico Estuarine System, a large and shallow back-barrier basin in eastern North Carolina, over a one-month study period (September 2008) with observations from several storm wind events of differing time scales and directions. Model performance is evaluated for a spatially varying wind field from the North American Regional Reanalysis (NARR) dataset in comparison to spatially uniform forcing from wind observations at offshore, coastal and land based sites across the region. A spatially uniform wind field from offshore winds observations results in statistically better hydrodynamic simulations of water levels (R = 0.88) in the estuaries than NARR (R = 0.48) after comparison with measurements and indicates the importance of strong marine winds over most of the estuary surface area. The influence of a prominent bathymetric feature on hydrodynamics in Pamlico Sound is also investigated by numerically removing a 30 km long and 2-3 m deep shoal from the model grid and replacing it with an idealized depth of 6 m. The removal of the shoal increases water level setup by 14% at the estuarine shoreline, decreases current magnitudes by up to 40% in the shoal region and increases significant wave heights locally by up to 25% in the sound, indicating the importance of this relict geomorphic feature as a major control on the hydrodynamic response of the system during wind events. The results suggest that increasing the water depth over the shoal can lead to higher storm surges and wave heights with the possibility of increased inundation and erosion of the back-barrier and mainland coastal regions. The complex bathymetry and marine wind influence are critical input conditions for modeling large and shallow lagoonal estuaries like the Albemarle-Pamlico Estuarine System. (C) 2017 Elsevier Ltd. All rights reserved.
机译：大型河口受邻近沿海海洋和陆地上空的风的影响，导致水位，水流和地表波的空间变化很大。在这项研究中，我们使用一个数值模型来模拟一个月的研究期（2008年9月），在北卡罗来纳州东部的一个大而浅的后屏障盆地Albemarle-Pamlico河口系统中的流体动力学和波浪，并通过几次暴风雨的观测不同时间尺度和方向的风事件。与来自北美区域再分析（NARR）数据集的空间变化风场的模型性能相比，该模型的性能与来自该地区近海，沿海和陆基站点的风场观测得到的空间均匀强迫进行了比较。在与测量值进行比较之后，从海上风向观测得到的空间均匀的风场在统计上比NARR（R = 0.48）更好地统计了河口水位的水动力模拟（R = 0.88），并表明了在大部分河口中强海风的重要性表面积。还通过数值方法从模型网格中删除了一个长30 km，深2-3 m的浅滩并将其替换为理想的6 m深度，研究了突出的测深特征对Pamlico Sound中水动力的影响。去除浅滩可将河口海岸线的水位提高14％，将浅滩区的电流强度降低40％，并在声音中将局部重要波高提高25％，这表明此遗物的重要性地貌特征作为风事件期间系统水动力响应的主要控制。结果表明，增加浅滩上的水深会导致更高的风暴潮和海浪高度，并有可能增加对后垒和大陆沿海地区的淹没和侵蚀。复杂的测深和海洋风影响是对大型和浅泻湖河口（如Albemarle-Pamlico河口系统）进行建模的关键输入条件。 （C）2017 Elsevier Ltd.保留所有权利。

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