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| Titel |
Comparison of empirical models with intensively observed data for prediction of salt intrusion in the Sumjin River estuary, Korea |
| VerfasserIn |
D. C. Shaha, Y.-K. Cho |
| 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 ; 13, no. 6 ; Nr. 13, no. 6 (2009-06-26), S.923-933 |
| Datensatznummer |
250011907
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| Publikation (Nr.) |
 copernicus.org/hess-13-923-2009.pdf |
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| Zusammenfassung |
| Performance of empirical models has been compared with extensively observed
data to determine the most suitable model for prediction of salt intrusion
in the Sumjin River estuary, Korea. Intensive measurements of salt intrusion
were taken at high and low waters during both spring and neap tide in each
season from August 2004 to April 2007. The stratification parameter varied
with the distance along the estuary, tidal period and freshwater discharge,
indicating that the Sumjin River estuary experiences a transition from
partially- or well-mixed during spring tide to stratified during neap tide.
The salt intrusion length at high water varied from 13.4 km in summer 2005
to 25.6 km in autumn 2006. The salt intrusion mostly depends on the
freshwater discharge rather than spring-neap tidal oscillation. Analysis of
three years observed salinity data indicates that the scale of the salt
intrusion length in the Sumjin River estuary is proportional to the river
discharge to the −1/5 power. Four empirical models have been applied to the
Sumjin River estuary to explore the most suitable model for prediction of
the salt intrusion length. Comparative results show that the Nguyen and
Savenije (2006) model, developed under both partially- and well-mixed
estuaries, performs best of all models studied (relative error of 4.6%).
The model was also applied under stratified neap tide conditions, with a
relative error of 5.2%, implying applicability of this model under
stratified conditions as well. |
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