Turbulent Structure and Sediment Transport Above Vortex Ripples in the Surf Zone
Abstract
Detailed observations of velocity profiles have been made within the surf zone above rippled and flat beds. These long-term observations were made from a fixed frame deployed on a shoal between two rip channels in Monterey Bay during RIPEX in spring 2001, and the more 2D local morphology during our measurements at Black's Beach during NOEX in the fall of 2003. The 1 cm vertical resolution, 3 component velocity profiles with co-incident suspended sediment concentration profiles provided by the Bistatic Coherent Velocity and Sediment Profiler allow sediment fluxes and velocity structure to be measured across the mean current and wave boundary layers. Examples of the net shoreward sediment flux seen in shoreward ripple migration under moderate to low forcing at the RIPEX shoal site will be contrasted with suspended sediment flux profiles during a significant accretion event near on yearday 309 at the NCEX site.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Turbulence-Resolving Coherent Acoustic Sediment Flux Probe Device and Method for Using
Stanton, Timothy Peter (The United States of America as represented by the Secretary of the Navy, Washington, DC (US), 2001-07-17);This invention describes a new method to estimate the sediment flux in front of a Coherent Acoustic Sediment Probe (CASP) instrument. Also, described is a newly invented Bistatic Doppler Velocity and Sediment Profiler (BDVSP) ... -
Using acoustic backscatter to measure sediment flux in the surf zone
Roland, Preston J. (Monterey, California. Naval Postgraduate School, 2006-12);Transport of sediment in coastal regions directly impacts mine countermeasure operations and naval construction efforts. Wave induced shear stress in the surf zone is responsible for entraining sediment particles into ... -
IDENTIFYING SEDIMENT TRANSPORT POTENTIAL AND VELOCITY PROFILES IN THE CARMEL RIVER USING AN ADP
McPherson, Tyonna N. (Monterey, CA; Naval Postgraduate School, 2020-12);The Carmel River runs 58 km from the Santa Lucia Mountains through the Carmel Valley, eventually stopping at a lagoon on Carmel River State Beach. During the winter months, the river breaches through the lagoon, allowing ...