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MORPHOLOGICAL MODELLING OF ARTIFICIAL SAND RIDGE NEAR HOEK VAN HOLLAND, THE NETHERLANDS

机译:荷兰Hoek VAN HOLLAND附近的人工沙脊形态学模型

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The study is focussed on the morphological modelling (based on DELFT3D model) of an artificial sand rige at the Dutch shoreface near Hoek van Holland close to the harbour of Rotterdam. The ridge is perpendicular to the coast and to the tidal flow. The sediment size is about 0.3 mm. The tidal range is about 2 m. The peak flood velocities (to north) and ebb velocities (to south) are about 0.6 and 0.55 m/s. Using a 1DH (depth-averaged) model approach, the growth and migration of a sand ridge can not be simulated properly as the modification of the velocity profiles can not be represented. This latter effect can only be simulated by using a 2DV (two-dimensional vertical) or a 3D model approach. Growth of the sand ridge can occur when bed-load transport is dominant. Decay (flattening) of the ridge occurs when suspended load transport is dominant, particularly when waves are important.
机译:这项研究的重点是在鹿特丹港口附近的Hoek van Holland附近的荷兰海岸的一种人造沙石的形态建模(基于DELFT3D模型)。脊垂直于海岸和潮流。沉积物大小约为0.3毫米。潮汐范围约为2 m。洪灾峰值速度(向北)和落潮速度(向南)分别约为0.6和0.55 m / s。使用1DH(深度平均)模型方法时,由于无法表示速度剖面的修改,因此无法正确模拟沙脊的生长和迁移。后一种效果只能通过使用2DV(二维垂直)或3D模型方法来模拟。当基床运输占主导地位时,可能会出现沙脊的生长。当悬挂的载荷传递起主导作用时,尤其是当波浪很重要时,就会发生脊的衰减(变平)。

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