Delft3D FM model input and results for sand wave models with varying sediment transport formulation and bed slope parameter, underlying Continental Shelf Research article: "The role of sediment transport processes in shaping offshore sand waves"

This dataset contains the model input and output for the Delft3D FM model runs used in the research article:Overes, P. H. P., Borsje, B. W., Luijendijk, A. P., Reyns, J. &amp; Hulscher, S. J. M. H. (2025). The role of sediment transport processes in shaping offshore sand waves, Continental Shelf Research, https://doi.org/10.1016/j.csr.2025.105513The aim of this study is to understand the impact of the way we parameterize sediment transport processes on the development of sand wave shapes and thereby improve the ability of our morphological models to predict in-situ sand wave dynamics in different areas. To this end 2DV hydro-morphodynamic Delft3D FM sand wave models were created for two case study locations (HKZ and Texel, see publication for details) in the Dutch North Sea. These models were run for the period between two bathymetric measurements (2008-2010 at Texel and 2012-2016 at HKZ) to allow for morphodynamic validation. To test the influence of different sediment transport formulations models were run with both the Van Rijn 1993 and the Van Rijn 2007 transport formulations. These were combined with varying values (0.5-5) of the longitudinal bed slope parameter (alpha_bs). The simulations revealed that the Van Rijn 2007 formulation, which predicts relatively lower transport rates, and thus allows for lower bed slope-induced transports, is better capable of preserving the steep slopes of sand waves, while limiting sand wave growth. Lastly, for the best performing settings a model was run using only tidal forcing to test the influence of non-tidal hydrodynamics. This dataset contains the model input and outpur for these runs. For the specifics about the input and ooutput file structure reference is made to the user manual(s): https://content.oss.deltares.nl/delft3dfm2d3d/<br><br>

本数据集包含本研究依托的学术论文中所使用的Delft3D FM模型模拟的输入与输出文件：Overes, P. H. P., Borsje, B. W., Luijendijk, A. P., Reyns, J. 与 Hulscher, S. J. M. H. (2025). 沉积物输运过程对近海沙波形态的调控作用，《大陆架研究》，https://doi.org/10.1016/j.csr.2025.105513。
本研究旨在明晰沉积物输运过程参数化方案对沙波形态发育的影响，进而提升地貌动力学模型预测不同区域原位沙波动态的能力。为此，针对荷兰北海的两个案例研究区域（HKZ与Texel，详细信息参见刊载论文），构建了二维垂向（2DV）水动力-地貌动力学Delft3D FM沙波模型。基于两次水深测量的间隔时段（Texel区域为2008-2010年，HKZ区域为2012-2016年）开展模型模拟，以完成地貌动力学验证。
为探究不同沉积物输运公式的影响，本研究分别采用Van Rijn 1993与Van Rijn 2007两种输运公式开展模拟，并搭配取值范围为0.5至5的纵向床面坡度参数（alpha_bs）。模拟结果表明：Van Rijn 2007公式预测的输运率相对更低，因此由床面坡度引发的输运量也更小，该公式更能够维持沙波的陡峭坡度，同时抑制沙波过度发育。最后，针对表现最优的模型参数配置，本研究仅采用潮汐强迫开展模拟，以探究非潮汐水动力的影响。本数据集即包含上述所有模拟的模型输入与输出文件。
关于输入与输出文件结构的具体细节，请参阅用户手册：https://content.oss.deltares.nl/delft3dfm2d3/