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A parameterization of the wavelength of tidal dunes

机译:沙丘波长的参数化

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摘要

The idealized model of Besio et al. (On the formation of sand waves and sand banks. Journal of Fluid Mechanics 2006; 557: 1-17) is used to predict the wavelength of tidal dunes (sand waves) generated by tidal currents in estuaries and shallow seas. The predictions are then analysed and a formula is proposed to estimate the wavelength of tidal dunes as a function of the parameters of the problem. The wavelength of the dunes is found to increase when the water depth is increased and/or the strength of the tidal current is decreased. On the other hand, the size of the bottom material (if medium sand is considered) and the tidal ellipticity are found to have a relatively small influence on the length of the bottom forms. The formula proposed provides results which are consistent with field observations of different authors.
机译:Besio等人的理想模型。 (关于沙波和沙堤的形成。Journalof Fluid Mechanics 2006; 557:1-17)用于预测由河口和浅海中的潮流产生的沙丘(沙波)的波长。然后对这些预测进行分析,并提出一个公式,以根据问题参数估算潮汐沙丘的波长。当增加水深和/或减小潮流强度时,发现沙丘的波长增加。另一方面,发现底部材料的尺寸(如果考虑中砂的话)和潮汐椭圆率对底部形状的长度影响较小。所提出的公式提供的结果与不同作者的实地观察相符。

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