Measuring Suspended Sand Transport Using A
Pulse-coherent Acoustic Doppler Profiler
Author(s)
T. Aagaard & B. Greenwood
Abstract
A simple method to derive sediment transport rates in the nearshore from Pulse-
Coherent Acoustic Doppler Profilers (PC-ADP) is described. Measured sediment
concentration profiles are compared with theoretically estimated concentration
profiles and exhibit good agreement. Cross-shore and longshore sediment
transport rates obtained during 5-6 week long deployments on the lower
shoreface in 6-8 m water depth are compared with predictions from an energetics
transport model. The two estimates agree to within 20% in the longshore
direction while the cumulated cross-shore wave-dominated transport component
is trending significantly less offshore for the measurements than for the model
predictions. The measurements indicate that significant onshore sediment
transport from the lower to the upper shoreface only occurs when waves are
close to breaking.
Keywords: PC-ADP, sediment concentrations, sediment transport, shoreface.
Keywords
PC-ADP, sediment concentrations, sediment transport, shoreface
Related Book
Other papers in this volume
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