...
  • 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 >Micro-tidal coastal reed beds: Hydro-morphological insights and observations on wave transformation from the southern Baltic Sea
【24h】

Micro-tidal coastal reed beds: Hydro-morphological insights and observations on wave transformation from the southern Baltic Sea

机译：微潮沿海芦苇床：波罗的海南部海浪转换的水力形态学见解和观测

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

This paper investigates the hydro-morphological controls on incident wind-generated waves at, and the transformation of such waves within, two Phragmites australis reed beds in the southern Baltic Sea. Meteorological conditions in combination with geomorphological controls result, over short (<2 km) distances, in significant differences in water level and wave climate to which fringing reed beds are exposed. Significant wave height attenuation reached a maximum of 2.6% m~(-1) and 11.8% m~(-1) at the transition from open water into the reed vegetation at the sheltered and exposed sites respectively. Wave attenuation through the emergent reed vegetation was significantly lower in greater water depths, suggesting (1) a reduced influence of bed friction by small shoots/roots and/or (2) drag reduction due to flexing of plants when the wave motion is impacting stems at a greater height above the bed. For a given water depth, wave dissipation increased with increasing incident wave height, however, suggesting that, despite their ability to flex, reed stems may be rigid enough to cause increased drag under greater wave forcing. The higher frequency part of the wave spectrum (>0.5 Hz) was preferentially reduced at the reed margin, confirming the theoretical wave frequency dependence of bottom friction. The possibility of physiological adaptation (differences in reed stem diameter) to water depth and wave exposure differences is discussed. The results have implications for the possible impact of environmental changes, both acute (e.g. storm surges) or chronic (e.g. sea level rise) in character, and for the appropriate management of reed bed sites and delivery of ecological goods and services.
机译：本文研究了波罗的海南部两个芦苇芦苇床处入射风产生波的水文形态控制及其在其中的转换。在短距离（<2 km）内，结合气象条件和地貌控制，会导致边缘芦苇床暴露在水位和波浪气候方面的显着差异。在遮蔽处和裸露处从露天水域向芦苇植被过渡时，波高的最大衰减分别达到2.6％m〜（-1）和11.8％m〜（-1）。在较大的水深中，通过涌现的芦苇植被的波衰减显着较低，表明（1）小芽/根减少了床摩擦的影响和/或（2）当波运动影响茎时，由于植物的挠曲，阻力减小了在床上方更大的高度。对于给定的水深，波浪耗散随着入射波高的增加而增加，但是，这表明，尽管芦苇茎具有挠曲能力，但其刚性可能足以在更大的波浪推动下增加阻力。波形频谱的高频部分（> 0.5 Hz）在芦苇边缘处优先降低，这证实了底部摩擦的理论波频率依赖性。讨论了适应水深和波浪暴露差异的生理适应性（芦苇茎直径差异）。这些结果对环境变化可能产生的影响产生影响，无论是急性的（例如风暴潮）还是慢性的（例如海平面上升），以及对芦苇床场所的适当管理以及生态产品和服务的提供。

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