Publications des scientifiques de l'IRD

Lefebvre Jean-Pierre, Mari Xavier, Thi Phuong Thao Do, Thuoc Van Chu. (2014). The role of TEP in estuarine hydrosedimentary functionning : impact on settling velocity of aggregates. In : Lynett P. (ed.). International Conference on Coastal Engineering (ICCE). Coastal Engineering Proceedings, (34), 12 p. International Conference on Coastal Engineering (ICCE), 34., Séoul (KOR), 2014/06/15-20. ISBN 978-0-9896611-2-6. ISSN 2156-1028.

Titre du document
The role of TEP in estuarine hydrosedimentary functionning : impact on settling velocity of aggregates
Année de publication
2014
Type de document
Article
Auteurs
Lefebvre Jean-Pierre, Mari Xavier, Thi Phuong Thao Do, Thuoc Van Chu
In
Lynett P. (ed.), International Conference on Coastal Engineering (ICCE)
Source
Coastal Engineering Proceedings, 2014, (34), 12 p. ISBN 978-0-9896611-2-6 ISSN 2156-1028
Colloque
International Conference on Coastal Engineering (ICCE), 34., Séoul (KOR), 2014/06/15-20
Transparent exopolymer particles (TEP) are widely recognized to promote sediment aggregation in eutrophic environments. Flocculation in presence of TEP of various suspended sediment concentrations of material sampled on the bank of the Cam River was quantified at the laboratory for turbulence level consistent with slack water and mid ebb conditions measured in the Cam River estuary during dry season of 2009. Stickiness and concentrations of TEP were let to naturally fluctuate by incubation (aging in the dark) for up to nine days. We found that the impact of turbulence on overall buoyancy of TEP-governed aggregation was always opposite between slack water and mid ebb conditions for any duration of incubation; always negative for slack water conditions but for 126 hours of incubation and significantly negative for mid ebb conditions but for 126 hours of incubation. Suspended sediment concentration (SSC) consistently limited aggregates buoyancy, negative or positive. We propose a conceptual model that relates measured and inferred parameters to observed hydrosedimentary processes.
Plan de classement
Transports solides et qualité physico-chimique des eaux [062MECEAU04] ; Sédimentologie [064SEDIM]
Descripteurs
SEDIMENTATION ESTUARIENNE ; MATIERE EN SUSPENSION ; MATIERE ORGANIQUE PARTICULEE ; AGREGAT ; COURANT ; MODELISATION
Description Géographique
VIET NAM
Localisation
Fonds IRD [F B010064311]
Identifiant IRD
fdi:010064311
Contact