Sediment Processes and Flow Reversal in the Undular Tidal Bore of the Garonne River
| dc.contributor.author | REUNGOAT, David
IDREF: 16526828X | |
| dc.contributor.author | CHANSON, Hubert | |
| dc.contributor.author | CAPLAIN, Bastien | |
| dc.date.accessioned | 2021-05-14T10:03:49Z | |
| dc.date.available | 2021-05-14T10:03:49Z | |
| dc.date.created | 2012 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/78444 | |
| dc.description.abstractEn | A tidal bore is a series of waves propagating upstream as the tidal flow turns to rising, and the bore front corresponds to the leading edge of the tidal wave in a funnel shaped estuarine zone with macro-tidal conditions. Some field observations were conducted in the tidal bore of the Garonne River on 7 June 2012 in the Arcins channel, a few weeks after a major flood. Despite the high initial water level and strong fluvial current, the bore front exhibited a sharp discontinuity in terms of free-surface elevation: the bore front was 0.45 m and 0.52 m high on the morning and afternoon respectively. The tidal bore was a flat undular bore with a Froude number close to unity: Fr1 = 1.02 and 1.19 in the morning and afternoon respectively. The field observations highlighted a number of unusual features on the morning of 7 June 2012 when detailed free-surface and velocity measurements were conducted simultaneously. These included (a) a slight rise in water elevation starting about 70 s prior to the front, (b) a flow reversal about 50 s after the bore front, (c) some large fluctuations in suspended sediment concentration (SSC) about 100 s after the bore front and (d) a transient water elevation lowering about 10 minutes after the bore front passage. The measurements of water temperature and salinity showed nearly identical results before and after the tidal bore: there was no evidence of saline or thermal front. | |
| dc.language.iso | en | |
| dc.subject.en | Field measurements | |
| dc.subject.en | Undular tidal bore | |
| dc.subject.en | Garonne River | |
| dc.subject.en | Suspended sediment processes | |
| dc.subject.en | Flow reversal | |
| dc.subject.en | Field measurements. | |
| dc.title.en | Sediment Processes and Flow Reversal in the Undular Tidal Bore of the Garonne River | |
| dc.type | Document de travail - Pré-publication | |
| dc.subject.hal | Physique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph] | |
| dc.subject.hal | Sciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph] | |
| bordeaux.hal.laboratories | Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295 | * |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.institution | Bordeaux INP | |
| bordeaux.institution | CNRS | |
| bordeaux.institution | INRAE | |
| bordeaux.institution | Arts et Métiers | |
| hal.identifier | hal-00790636 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00790636v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.au=REUNGOAT,%20David&CHANSON,%20Hubert&CAPLAIN,%20Bastien&rft.genre=preprint |
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