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On the formation of current ripples (2015)

J. Bartholdy; V. B. Ernstsen; B. W. Flemming; C. Winter; A. BartholomäA. Kroon

Springer Nature

In: Scientific Reports

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Publication Date: 2015-06-13

Description: For grain sizes finer than coarse sand, the first flow-transverse bedforms to develop are current ripples. Although numerous studies have analysed different aspects of bedform morphodynamics, to date no comprehensive physical explanation for the formation of ripples has been given. We offer such an explanation based on a virtual boundary layer concept, and present a model predicting ripple height on the basis of grain size, current velocity and water depth. The model contradicts the conventional view of current ripples as bedforms not scaling with flow depth. Furthermore, it confirms the dependence of ripple dimensions on grain size, and their relative insensitivity to flow strength. Scientific Reports 5 doi: 10.1038/srep11390

Electronic ISSN: 2045-2322

Topics: Natural Sciences in General

Published by Springer Nature

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