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Accueil > Équipes > Equipe MEIGE : Modélisation, Expériences et Instrumentation pour la Géophysique et l’Environnement > Outils et Moyens > Instruments et techniques de mesure

Suspension acoustics and its application in fine-scale flow and sediment transport studies

Acoustic backscattering has been used with growing intensity over the past 20 years for the study of flow / sediment processes in coastal, estuarine and river flows. Only recently, the capability of merging incoherent intensity inversions with pulse-coherent Doppler phase estimations has been allowed due to high-performance hardware and software technologies. The joint research activity named Scaling Analysis and New instrumentation for mobile beD testS (SANDS) provided financial support within the european project HYDRALAB III (http://www.hydralab.eu/) for the development of an Acoustic Concentration and Velocity Profiler (ACVP). The system can profile the suspended sediment concentration and up to 4 components of the flow velocity at small turbulent scale. The system is particularly adapted to the study of unsolved boundary layer problems under wave and / or current dominated mobile bed flows. The multi-frequency capability of the ACVP allows for unique performances in terms of turbulence and sediment concentration measurements across the highly concentrated nearbed region.

Thorne, P. D., and Hurther, D. (2014). An overview on the use of backscattered sound for measuring suspended particle size and concentration profiles in non-cohesive inorganic sediment transport studies. Continental Shelf Research, 73, 97–118.

Moore, S. A., Le Coz, J., Hurther, D., & Paquier, A. (2013). Using multi-frequency acoustic attenuation to monitor grain size and concentration of suspended sediment in rivers. Journal of the Acoustical Society of America, 133(4), 1959–1970.

Moore, S. A., Le Coz, J., Hurther, D. and Paquier, A. (2012) On the application of horizontal ADCPs to suspended sediment transport surveys in rivers. Continental Shelf Research, 46, 50-63. doi:10.1016/j.csr.2011.10.013.

Hurther, D., and Thorne, P. D. (2011). Suspension and near-bed load sediment transport processes above a migrating, sand-rippled bed under shoaling waves. Journal of Geophysical Research C : Oceans, 116, 07001.

Thorne, P. D., Hurther, D., and Moate, B. (2011). Acoustic inversions for measuring boundary layer suspended sediment processes. Journal of the Acoustical Society of America, 130(3), 1188–1200.

Hurther, D., Thorne, P. D., Bricault M., Lemmin U. and Barnoud, J M., (2011). A multi-frequency Acoustic Concentration and Velocity Profiler for boundary layer measurements of fine-scale flow and sediment transport processes. Coastal Engineering, 58, 594–605.

Hurther D, and Lemmin U (2008). Improved turbulence profiling with field adapted Acoustic Doppler Velocimeters using a bi-frequency Doppler noise suppression method. J. of Atmos. and Oceanic Technol. 25 (2), 452-463.

Douroudian B., Hurther D. and Lemmin U (2007). A discussion of turbulence measurements with acoustic Doppler velocimeters. ASCE-J. Hydraulic Eng. 133 : 1286.

Hurther D. and Lemmin U. (2001) - A correction method for turbulence measurements with a 3D acoustic Doppler velocity profiler. J. Atmos. Oceanic Technol. 18(3), 446-458.

Hurther D. and Lemmin U. (1998), A constant-beam-width transducer for 3D acoustic Doppler profile measurements in open-channel flow. Meas. Sci. Technol. 9(10) : 1706-1714.

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