Predicting wave-induced ripple equilibrium geometry
Nelson, Timothy R.
Traykovski, Peter A.
MetadataShow full item record
KeywordWave-induced ripples; Equilibrium ripples; Ripple height; Ripple wavelength; Ripple steepness
A comprehensive database of existing (since 1954) field and laboratory measurements of ripple geometry is compiled and combined with newly collected field data to examine the performance of ripple equilibrium predictors. Reanalysis of this enlarged ripple geometry data set reveals that ripples formed from monochromatic waves scale differently than ripples formed from random waves for many existing ripple predictors. Our analysis indicates that ripple wavelengths from the two data sets collapse into a single scaling when the semiorbital excursion and sediment grain diameter are used as normalizing factors. Ripple steepness remains relatively constant for both regular and irregular wave conditions, and it only slightly increases for shorter ripple wavelengths. These findings allowed for the development of a new equilibrium ripple predictor suitable for application in a wide range of wave and sediment conditions.
Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 118 (2013): 3202–3220, doi:10.1002/jgrc.20241.
Showing items related by title, author, creator and subject.
Hsu, Tian-Jian; Elgar, Steve; Guza, R. T. (2006-04-06)The 25-m onshore migration of a nearshore sandbar observed over a 5-day period near Duck, NC is simulated with a simplified, computationally efficient, wave-resolving singlephase model. The modeled sediment transport is ...
Predicting seabed burial of cylinders by wave-induced scour : application to the sandy inner shelf off Florida and Massachusetts Trembanis, Arthur C.; Friedrichs, Carl T.; Richardson, Michael D.; Traykovski, Peter A.; Howd, Peter A.; Elmore, Paul A.; Wever, Thomas F. (IEEE, 2007-01)A simple parameterized model for wave-induced burial of mine-like cylinders as a function of grain-size, time-varying, wave orbital velocity and mine diameter was implemented and assessed against results from inert ...
Womeldorf, Carole A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-08)We begin with the linearized irrotational theory describing the diffraction of an incoming plane wave by a vertical cylinder. From the free-surface motion, we describe the boundary-layer flow field U0i near that cylinder. ...