FN Archimer Export Format
PT J
TI Suspended sediment concentration field quantified from a calibrated MultiBeam EchoSounder
BT 
AF Fromant, Guillaume
   Le Dantec, Nicolas
   Perrot, Yannick
   Floc'h, France
   Lebourges-Dhaussy, Anne
   Delacourt, Christophe
AS 1:1,2;2:1,3;3:4;4:1;5:4;6:1;
FF 1:;2:;3:;4:;5:;6:;
C1 Institut Universitaire Européen de la Mer, Laboratoire Géosciences Océan – UMR 6538, Rue Dumont d’Urville, 29280 Plouzané, France
   Laboratoire d'Informatique Signal et Image de la Côte d'Opale, 50, rue Ferdinand Buisson, 62228, Calais, France
   Centre d’Etudes et d’expertise sur les Risques, l’Environnement, la Mobilité et l’Aménagement, DTecEMF, 134 Rue de Beauvais, 60280 Margny-lès-Compiègne, France
   Institut de la Rechercher pour le Développement, Laboratoire de l’Environnement MARin - UMR 6539, Pointe du Diable, 29280 Plouzané, France
C2 UBO, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   DTECEMF, FRANCE
   IRD, FRANCE
UM LEMAR
   LGO
IN WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 3.614
TC 9
UR https://archimer.ifremer.fr/doc/00690/80251/83331.pdf
LA English
DT Article
BO Albert Lucas
DE ;Acoustic backscattering;Multifrequency acoustics;Suspended sediments concentration;Acoustic inversion;MultiBeam EchoSounder
AB Acoustic scattering can be used to estimate Suspended Sediment Concentration (SSC) through acoustic inversion methods. Current SSC quantification methods are mostly unable to observe both spatial and temporal variations. Here, we assess the possibility to measure both using a Multibeam Echosounder (MBES). MBES combine a large spatial covering in the water column and the capability to measure ‘on route’, allowing a better representativity of the measurements. Time-series of raw EM3002-MBES data at 300 kHz were acquired during a 5-hours field experiment at a fixed location in the Aulne macrotidal estuary (France) during ebb, ensuring sufficient SSC variations. Concurrently, 4-frequencies Acoustic Backscattering System (ABS) profiles were acquired in the water column, as well as turbidity profiles, further converted into SSC using collected water samples. An original in-situ calibration was performed on the MBES, using a tungsten sphere of known properties, which allowed corrections to be made to the volume backscattered levels over the echosounder fan. Using ABS-derived equivalent radii, the MBES backscattered signal was inverted to retrieve an SSC estimate. Good consistency between MBES time-series observations and turbidity-derived SSC is observed. This experiment demonstrates the potential use of MBES for 3-dimensional turbidity observations in coastal areas, which is of great interest for sediment flux quantification. 
PY 2021
PD SEP
SO Applied Acoustics
SN 0003-682X
PU Elsevier BV
VL 180
UT 000655494800043
DI 10.1016/j.apacoust.2021.108107
ID 80251
ER

EF