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| Titel |
Salt intrusion in multi-channel estuaries: a case study in the Mekong Delta, Vietnam |
| VerfasserIn |
A. D. Nguyen, H. H. Savenije |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 10, no. 5 ; Nr. 10, no. 5 (2006-10-16), S.743-754 |
| Datensatznummer |
250008198
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| Publikation (Nr.) |
 copernicus.org/hess-10-743-2006.pdf |
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| Zusammenfassung |
| There is a well-tested theory for the computation of salt intrusion in
alluvial estuaries that is fully analytical and predictive. The theory uses
analytical equations to predict the mixing behaviour of the estuary based on
measurable quantities, such as channel topography, river discharge and tidal
characteristics. It applies to single-channel topographies and estuaries
that demonstrate moderate tidal damping. The Mekong delta is a multi-channel
estuary where the tide is damped due to a relatively strong river discharge
(in the order of 2000 m3/s), even during the dry season. As a result
the Mekong is a strongly riverine estuary. This paper aims to test if the
theory can be applied to such a riverine multi-channel estuary, and to see
if possible adjustments or generalisations need to be made. The paper
presents salt intrusion measurements that were done by moving boat in 2005,
to which the salt intrusion model was calibrated. The theory has been
expanded to cater for tidal damping. Subsequently the model has been
validated with observations made at fixed locations over the years 1998 and
1999. Finally it has been tested whether the Mekong calibration fits the
overall predictive equations derived in other estuaries. The test has been
successful and led to a slight adjustment of the predictive equation to
cater for estuaries that experience a sloping bottom. |
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