Robust methods for the decomposition and interpretation of compound dunes applied to a complex hydromorphological setting,Earth Surface Processes and Landforms

当前位置： X-MOL 学术 › Earth Surf.Process. Land. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Robust methods for the decomposition and interpretation of compound dunes applied to a complex hydromorphological setting
Earth Surface Processes and Landforms ( IF 2.8 ) Pub Date : 2020-11-28 , DOI: 10.1002/esp.5040
Leon Scheiber ₁ , Oliver Lojek ₁ , Axel Götschenberg ₂ , Jan Visscher ₁ , Torsten Schlurmann ₁

Affiliation

Underwater dunes are a morphological feature that are explored by marine scientists and coastal engineers alike. This study presents new methodologies in order to simplify bedform identification and morphodynamic analyses. Specifically, subaqueous compound dunes are decomposed with a simple yet extensive tracking algorithm, which relies on a repeated evaluation of unfiltered bed elevation profiles according to five predefined length classes. In a second step, morphological trends are assessed in the form of bed migration rates, bed slope asymmetries and net sediment changes, in which all parameters are referred to equidistant sections of the examined fairway stretch. This integrated approach not only avoids the challenges in weighting the varying size and abundance of dunes of different scales but also ensures comparability between dune‐specific and areal parameters, which significantly improves the interpretation of the morphological setting as a whole. The developed methods are applied to the Outer Jade fairway, an anthropogenically influenced and regularly maintained waterway in the German Bight, and allow scrutiny of spatio‐temporal trends in this region.

中文翻译：

复杂沙丘分解和解释的鲁棒方法，应用于复杂的水形态学环境

水下沙丘是海洋科学家和沿海工程师共同探索的一种形态特征。这项研究提出了新的方法，以简化床形识别和形态动力学分析。具体而言，用简单但广泛的跟踪算法分解水下复合沙丘，该算法依赖于根据五个预定义的长度类别对未过滤床高程剖面进行重复评估。在第二步中，以河床迁移率，河床坡度不对称和净沉积物变化的形式评估形态趋势，其中所有参数均以所检查球道伸展的等距截面为参考。这种综合方法不仅避免了权衡不同规模沙丘的大小和丰度方面的挑战，而且确保了沙丘特定参数和面积参数之间的可比性，从而显着改善了整个形态设置。发达的方法适用于外人玉道，这是人为影响和定期维护的德国湾水道，并可以对该地区的时空趋势进行仔细检查。

更新日期：2020-11-28

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11