A multi-frequency Acoustic Concentration and Velocity Profiler (ACVP) for boundary layer measurements of fine-scale flow and sediment transport processes
Hurther, David; Thorne, Peter D.; Bricault, Mickaël; Lemmin, Ulrich; Barnoud, Jean-Marc. 2011 A multi-frequency Acoustic Concentration and Velocity Profiler (ACVP) for boundary layer measurements of fine-scale flow and sediment transport processes. Coastal Engineering, 58 (7). 594-605. 10.1016/j.coastaleng.2011.01.006Full text not available from this repository.
The use of acoustics to measure sediment transport boundary layer processes has gained increasing acceptance over the past two decades. This has occurred through the development of increasingly sophisticated measuring systems and theoretical developments, which have enabled flow and suspended sediment parameters to be obtained from acoustic data with a high degree of accuracy. Until relatively recently, separate acoustic systems were used to measure flow and suspended sediment concentration. Over the past few years, however, the technology has become sufficiently advanced so that flow and sediment measurements can be integrated into a single system. This integration provides, quasi-instantaneous, non-intrusive, co-located, high temporal-spatial resolution measurements of benthic flow and sediment processes. Here the development of such an instrument, the Acoustic Concentration and Velocity Profiler (ACVP) is described. The theory underpinning its application is outlined, new approaches to velocity de-aliasing and suspended sediment inversion instabilities using multi-frequency capabilities are presented and the application of the system to sediment transport processes over a sandy ripple bed is illustrated. The observations clearly show the value of such instrumentation for studying the dynamical interaction between the bed, the flow and the sediments at and within the bottom boundary layer
|Programmes:||Oceans 2025 > Shelf and coastal processes|
|Additional Keywords:||ACOUSTIC BACKSCATTERING; ACOUSTIC DOPPLER CURRENT PROFILER; ADCP; SEDIMENT TRANSPORT; WAVES; COASTAL MEASUREMENTS|
|NORA Subject Terms:||Marine Sciences|
|Date made live:||03 Aug 2011 12:51|
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