Multi-frequency acoustics for suspended sediment investigation: validation at Parana River

Authors
Guerrero, Massimo; Szupiany, Ricardo Nicolas; Latosinski, Francisco Guillermo
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
A method of using two acoustic Doppler current profilers operating at different frequencies and employed at the same measuring vertical to sample a profile of suspended sediment concentration has been previously applied in the Parana River (Argentina) but has not been validated by direct sediment samples. The present work fills this gap by reporting new field data and comparing them with acoustically inferred sediment concentrations. The agreement between directly measured sediment concentrations and grain sizes with corresponding estimates from an employed backscatter model was found to be good (squared correlation coefficients are 0.9 and 0.8, and mean deviations are 14 and 6%, respectively). The interrelations between flow velocity and suspended sediment concentration at fixed locations and in a moving mode along a river cross-section have been also investigated. Observed events of bed sediment re-suspension were found to be highly correlated with fluctuations of the vertical flow velocity, with a 100–150s quasi-periodicity. The size of re-suspension plumes was increasing from the channel thalweg to the low-submerged bar areas.
Fil: Guerrero, Massimo. Universita Di Bologna; Italia
Fil: Szupiany, Ricardo Nicolas. Universidad Nacional del Litoral. Facultad de Ingenieria y Ciencias Hidricas. Departamento de Hidraulica; Argentina
Fil: Latosinski, Francisco Guillermo. Universidad Nacional del Litoral. Facultad de Ingenieria y Ciencias Hidricas. Departamento de Hidraulica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe; Argentina
Subject
ADCP
BACKSCATTER
FIELD STUDIES
MULTI-FREQUENCY
PARANA RIVER
SUSPENDED SEDIMENTS
Oceanografía, Hidrología, Recursos Hídricos
Ciencias de la Tierra y relacionadas con el Medio Ambiente
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/6495