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Assessment of the effects of marine aggregate extraction on the coastline: an example from the German Baltic Sea coast
Kortekaas, S.; Bagdanaviciute, I.; Gyssels, P.; Alonso Huerta, J.M.; Hequette, A. (2010). Assessment of the effects of marine aggregate extraction on the coastline: an example from the German Baltic Sea coast. J. Coast. Res. SI 51: 205-214. https://dx.doi.org/10.2112/SI51-019.1
In: Journal of Coastal Research. Coastal Education and Research Foundation: Fort Lauderdale. ISSN 0749-0208; e-ISSN 1551-5036, meer
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| Trefwoorden |
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| Author keywords |
redging; sediment transport; integrated coastal zone model; Sistema de Modelado Costero (SMC); differential bathymetry; beach erosion |
| Auteurs | | Top |
- Kortekaas, S.
- Bagdanaviciute, I.
- Gyssels, P.
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- Alonso Huerta, J.M.
- Hequette, A.
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| Abstract |
The German Baltic Sea coast between Warnemünde and Darss is rapidly eroding. In this area, extensive sand extractiontakes place at water depths of 8-13 m, for both local beach nourishment and industrial use. Sand resources in thearea are restricted to a layer of <2 m of Holocene sand, whilst contemporary input of sand is limited to erosion of thecliff sections. To investigate if sand extraction in this area has any effect on the coastline, bathymetric data from twoparticular time periods were compared, as well as the location of the coastline over 5 different years, ranging from1953-2002. Waves and wave-induced sediment transport were simulated using the integrated coastal zone model,Sistema de Modelado Costero (SMC). Results indicate some primary areas of concern: small changes in bathymetryof approximately 10% are sufficient to cause significant modifications in sediment transport potential at the coast;and, thus, alternations in the patterns of erosion and accretion. Sediment transport by both wave action and currents,induced by the inflow of North Sea water, is in a NE direction towards Darss. Here, deposition takes place in a NationalPark, where dredging is prohibited. There is very little input of sediment in the system. Any sand that is removedby marine aggregate extraction, for industrial use, will have a negative effect on the total sediment budget at theshoreline. |
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