Issue |
La Houille Blanche
Number 3, Mai-Juin 2005
|
|
---|---|---|
Page(s) | 103 - 114 | |
DOI | https://doi.org/10.1051/lhb:200503014 | |
Published online | 01 June 2007 |
Mascaret, Aegir, Pororoca, Tidal Bore. Quid ? Où ? Quand ? Comment? Pourquoi ?
Tidal Bore, Aegir, Pororoca, Mascaret. Quid? Where? When? How? Why?
Le mascaret est un phénomène hydraulique, parfois mythique, souvent mal expliqué, et relativement peu documenté. Dans cet article, on explique ce qu'est un mascaret, où on peut le rencontrer, depuis quand il existe, comment il se développe et pourquoi il s'agit un phénomène important pour l'environnement. En particulier, on démontre que le mascaret est un processus fragile, résultant d'une délicate balance entre les marées, le débit d'eau douce dans la rivière, la topographie de l'estuaire, et les conditions météorologiques. Le lecteur trouvera de plus amples informations sur deux sites Internet {http://www.uq.edu.au/~e2hchans/tid_bore.html} et {http://www.uq.edu.au/~e2hchans/mascaret.html}.
Abstract
Tidal bores are a hydraulic phenomenon that is often not well explained and poorly documented. Herein, the writer explains what a tidal bore is, where it occurs, since when it has been observed, how it develops and why the occurrence of a bore has a significant impact on estuarine systems. In particular it is shown that a tidal bore results from a fragile balance between tidal and fluvial conditions, the estuary shape, and the meteorological conditions. Further information is available on the Internet {http://www.uq.edu.au/~e2hchans/tid_bore.html} and {http://www.uq.edu.au/~e2hchans/mascaret.html.
Mots clés : Estuaires
© Société Hydrotechnique de France, 2005
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