Artículo
Multi-frequency acoustics for suspended sediment investigation: validation at Parana River
Fecha de publicación:
10/2013
Editorial:
Taylor & Francis
Revista:
Journal of Hydraulic Research
ISSN:
0022-1686
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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.
Palabras clave:
Adcp
,
Backscatter
,
Field Studies
,
Multi-Frequency
,
Parana River
,
Suspended Sediments
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Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Guerrero, Massimo; Szupiany, Ricardo Nicolas; Latosinski, Francisco Guillermo; Multi-frequency acoustics for suspended sediment investigation: validation at Parana River; Taylor & Francis; Journal of Hydraulic Research; 51; 6; 10-2013; 696-707
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