Replication Data for: Spatially varying environmental properties controlling observed sand wave morphology, Part 2

Dataset belonging to the publication: Spatially Varying Environmental Properties Controlling Observed Sand Wave Morphology (2017-06-21).
Sand wave morphology and dynamics on continental shelves vary substantially and we hypothesize that these spatial variations depend on local bed properties and hydrodynamic characteristics. To date, process-based modelling studies have not been able to simulate realistic equilibrium sand wave heights and empirical studies are mostly limited to case studies. In order to explain the spatial variation in the morphology of equilibrium sand waves on continental shelves with processes and local bed conditions, a large-scale investigation is required. In this paper, we use high-resolution multibeam echo soundings, hydrodynamic models and databases and sedimentary data for the analysis of respectively sand wave shape characteristics and the comparison to hydrodynamic and sedimentary characteristics for the Netherlands Continental Shelf. The results are quantified lengths, heights and asymmetry of all sand waves in the Dutch part of the North Sea. Furthermore, we show that suspended sediment is a dominant factor in explaining sand wave length, height and asymmetry. Full results of shape characteristics of all sand waves on the Netherlands Continental Shelf together with the tidal velocity, water depth, surface wave height and median grain size are provided in a repository with this paper (URL). These results are highly valuable for applied offshore engineering projects and to modellers for validating their morphodynamic model results.

本数据集关联的发表文献为《控制观测沙波形态（sand wave morphology）空间变化的空间异质环境属性》（2017-06-21）。大陆架上的沙波（sand wave）形态与动力过程存在显著差异，我们提出假设：这类空间差异取决于局部底床属性与水动力特征。截至目前，基于过程的模拟研究尚无法复现符合实际的平衡态沙波高度，而实证研究大多仅局限于个案分析。为了基于过程与局部底床条件阐释大陆架（continental shelf）上平衡态沙波形态的空间差异，亟需开展大尺度调查研究。本文针对荷兰大陆架，采用高分辨率多波束测深系统（multibeam echo soundings）、水动力模型（hydrodynamic models）、相关数据库及沉积数据（sedimentary data），分别用于沙波形态特征分析，以及与水动力、沉积特征的对比研究。本次研究的量化结果包括北海荷兰海域内所有沙波的长度、高度与不对称性参数。此外，本研究证实悬浮泥沙（suspended sediment）是解释沙波长度、高度与不对称性的核心影响因素。本文配套的公开仓库中提供了荷兰大陆架上所有沙波的完整形态特征结果，以及潮流流速（tidal velocity）、水深（water depth）、浪高（surface wave height）与中值粒径（median grain size）等相关数据（URL）。上述研究结果对于近海工程应用项目，以及验证地貌动力模型（morphodynamic model）结果的建模人员而言，均具有极高的应用价值。