...
  • 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 >Impact of intertidal area characteristics on estuarine tidal hydrodynamics: A modelling study for the Scheldt Estuary
【24h】

Impact of intertidal area characteristics on estuarine tidal hydrodynamics: A modelling study for the Scheldt Estuary

机译：潮间带特征对河口潮汐水动力的影响：Scheldt河口的模型研究

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

Marsh restoration projects are nowadays being implemented as ecosystem-based strategies to reduce flood risks and to restore intertidal habitat along estuaries. Changes in estuarine tidal hydrodynamics are expected along with such intertidal area changes. A validated hydrodynamic model of the Scheldt Estuary is used to gain fundamental insights in the role of intertidal area characteristics on tidal hydrodynamics and tidal asymmetry in particular through several geomorphological scenarios in which intertidal area elevation and location along the estuary is varied. Model results indicate that the location of intertidal areas and their storage volume relative to the local tidal prism determine the intensity and reach along the estuary over which tidal hydrodynamics are affected. Our model results also suggest that intertidal storage areas that are located within the main estuarine channel system, and hence are part of the flow-carrying part of the estuary, may affect tidal hydrodynamics differently than intertidal areas that are side-basins of the main estuarine channel, and hence only contribute little to the flow-carrying cross-section of the estuary. If tidal flats contribute to the channel cross-section and exert frictional effects on the tidal propagation, the elevation of intertidal flats influences the magnitude and direction of tidal asymmetry along estuarine channels. Ebb-dominance is most strongly enhanced if tidal flats are around mean sea level or slightly above. Conversely, flood-dominance is enhanced if the tidal flats are situated low in the tidal frame. For intertidal storage areas at specific locations besides the main channel, flood-dominance in the estuary channel peaks in the vicinity of those areas and generally reduces upstream and downstream compared to a reference scenario. Finally, the model results indicate an along estuary varying impact on the tidal prism as a result of adding intertidal storage at a specific location. In addition to known effects of tidal prism decrease upstream and tidal prism increase downstream of additional storage areas, our model results indicate a reduction in tidal prism far downstream of intertidal storage areas as a result of a decreasing tidal range. This study may assist estuarine managers in assessing the impact of marsh restoration and managed shoreline realignment projects, as well as with the morphological management of estuaries through dredging and disposal of sediment on intertidal areas. (C) 2017 Elsevier Ltd. All rights reserved.
机译：如今，湿地恢复项目正在作为基于生态系统的战略来实施，以减少洪水风险并恢复沿河口的潮间带栖息地。随着潮间带面积的变化，预计河口潮汐水动力会发生变化。经过验证的Scheldt河口水动力模型可用于获得潮间带特征对潮汐水动力和潮汐不对称性的作用的基本见解，尤其是通过沿河口改变潮间带高度和位置的几种地貌场景。模型结果表明，潮间带区域的位置及其相对于当地潮汐棱镜的存储量决定了沿潮汐水动力受到影响的河口的强度和范围。我们的模型结果还表明，位于河口主河道系统内的潮间带存储区，因此是河口载流部分的一部分，对潮汐水动力的影响可能不同于主河口侧盆的潮间带。通道，因此对河口的载流截面贡献很小。如果潮滩对河道横截面有贡献并对潮汐传播产生摩擦作用，则潮滩的高度会影响沿河口河道的潮汐不对称性的大小和方向。如果潮滩位于平均海平面附近或略高于海平面，则退潮优势会得到最大增强。相反，如果潮汐平面位于潮汐框架的低处，则洪水支配性会增强。对于除主要航道以外的特定位置的潮间带存储区域，河口河道的洪水优势在这些区域附近达到峰值，与参考方案相比，通常会减少上游和下游。最后，模型结果表明，由于在特定位置增加了潮间带存储，河口对潮汐棱镜的变化影响很大。除了已知的潮汐棱镜减少附加存储区域上游的潮汐棱镜和增加下游的附加存储区域的效应外，我们的模型结果还表明，由于潮汐范围减小，潮汐棱镜在较远的潮汐存储区域下游减小。这项研究可以帮助河口管理人员评估沼泽恢复和管理的海岸线调整项目的影响，以及通过对潮间带地区的泥沙进行疏and和处置来进行河口的形态管理。 （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