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首页> 外文会议>International Conference on Coastal Engineering 2006(ICCE 2006); 20060903-08; San Diego,CA(US) >INTERACTIONS OF TIDAL INLET MIGRATION AND A LARGE-SCALE GROYNE
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INTERACTIONS OF TIDAL INLET MIGRATION AND A LARGE-SCALE GROYNE

机译：潮汐入口迁移与大型旋流的相互作用

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The longshore sediment transport along the southern North Sea coast effects resultingly a drift from west to east. Therefore most of the East Frisian tidal inlets tend to migrate into the same direction. The eastward migration of the Harle inlet was accelerated by the adaption of tidal basin and inlet to the resedimentation of a medieval storm surge bay. Since 1940 a large-scale groyne at the western shore of the island of Wangerooge in the Harle inlet prevents further migration, keeps the main channel in position and restricts the extent of a secondary channel. But with the redistribution of tidal gullies in the catchment area since the middle of the 1980s the tidal prism of the secondary channel has significantly increased and accordingly its cross-section started to expand. Investigations by phenomenological analysis and empirical equilibrium relations indicate that the partial cross-sections in the Harle inlet experience a retarded adjustment to the modified morpho-dynamical conditions. Further convergence towards morphodynamical equilibrium is expected leading to further erosion in the secondary channel in future.
机译：沿北海南部海岸的近岸沉积物运输导致从西向东的漂移。因此，大多数东弗里斯兰潮汐入口倾向于向同一方向迁移。潮汐盆地和进气口适应了中世纪风暴潮湾的重新沉积，促使Harle进气口向东迁移。自1940年以来，在Harle入口的Wangerooge岛西海岸形成了一个大型防波堤，阻止了进一步的迁移，将主通道保持在适当的位置，并限制了辅助通道的范围。但是，自1980年代中期以来，随着集水沟在集水区的重新分布，次级河道的潮汐棱镜显着增加，因此其横截面开始扩大。通过现象学分析和经验均衡关系进行的研究表明，Harle入口的部分横截面对改进的形态动力学条件进行了延迟调整。预期会进一步趋向形态动力学平衡，从而导致将来在次要通道中进一步侵蚀。

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