Sedimentation in brackwasserbeeinflussten Vorhäfen KFKI-Projekt 63-2, 03 KIS 020
The knowledge of currents and sediment transport in a tidal environment are most relevant for the design of harbours and harbour maintenance. Influencing currents and the sediment transport from alignment and specific structures can lead to a reduction of sedimentation in harbours. Even limited redu...
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| Veröffentlicht in: | Hansa |
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| Weitere Verfasser: | , , , |
| Format: | UnknownFormat |
| Sprache: | ger |
| Veröffentlicht: |
2005
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Tag hinzufügen | Zusammenfassung: | The knowledge of currents and sediment transport in a tidal environment are most relevant for the design of harbours and harbour maintenance. Influencing currents and the sediment transport from alignment and specific structures can lead to a reduction of sedimentation in harbours. Even limited reductions can reduce dredging costs and in case of contamination also save costs for deposition or processing.In a Research Project financed by the German Ministry for Research (BMBF, registration: 03KIS020) 3-dimensional numerical models were used for the Ems and the Weser estuaries to simulate currents and sediment transport in a brackish and tidal environment. The main focus was on currents in and in front of the harbour entrances via the >>Große Seeschleuse<< (Emden) and the >>Nord-schleuse<< (Bremerhaven). Complex currents in the harbours have been visualised, water exchange is determined and sedimentation in the harbour could be shown.In addition complex multidimensional boundary conditions were extracted from regional models to run detailed models with different geometries, tidal conditions and salinities in a parameter study. The effect of these parameters on sedimentation in a harbours have been determined. Results of this parameter study were used to develop technical features to reduce sedimentation along a brackish tidal environment. Dredging alternatives were tested for the harbour of Bremerhaven Nordschleuse in the river Weser.The numerical model was capable of simulating the essential hydrodynamic effects and sediment transport phenomena. Quality and capabilities of the numerical modelling were proven. The developed methodology can be used to minimise sedimentation in harbours. |
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| Beschreibung: | Ill |
| ISSN: | 0017-7504 |