Ripple Dynamics and Benthic Transformations under Variable Wave Forcing

Previous work has shown that sound penetration into sandy sediments at low grazing angles is greatly enhanced when ripples are present on the seafloor. The reasons for this phenomenon are still under investigation. To this end, a comprehensive understanding of ripple dynamics and their interaction with acoustic penetration into sediments has been sought in two recent initiatives: the Ripples DRI and SAX-04. In parallel with these efforts, our research program seeks to create broad scientific knowledge that underpins the development of predictive tools akin to ripple dynamics and benthic transformations under variable wave forcing. In particular, the program is designed to better understand the genesis, temporal and spatial growth, evolution, dislocations and decay of small-scale ripple morphology on sandy seafloors in shallow waters underlain by homogeneous and heterogeneous sediments. The aim is to study and parameterize critical hydrodynamic processes affecting ripple dynamics and their transformations using laboratory experiments, theoretical analyses and numerical simulations.