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Nearshore dredging in the Baltic Sea: Condition after cessation of activities and assessment of regeneration
Manso, F.; Radzevicius, R.; Blazauskas, N.; Ballay, A.; Schwarzer, K. (2010). Nearshore dredging in the Baltic Sea: Condition after cessation of activities and assessment of regeneration. J. Coast. Res. SI 51: 187-194
In: Journal of Coastal Research. Coastal Education and Research Foundation: Fort Lauderdale. ISSN 0749-0208, more
Peer reviewed article

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Keywords
Author keywords
    Marine aggregates; dredging effects; regeneration; western Baltic Sea

Authors  Top 
  • Manso, F.
  • Radzevicius, R.
  • Blazauskas, N.
  • Ballay, A.
  • Schwarzer, K.

Abstract
    Using hydro-acoustic survey techniques (side-scan sonar and multibeam), high-resolution bathymetric and acoustic images (sonographs) of former marine aggregate extractions, from Tromper Wiek (Rügen Island, Baltic German Coast) were obtained. These data, together with ground-truthing (underwater video and seabed sediment samples) are used to describe the present condition of marks generated by mining, in terms of their morphology and superficial grain size distribution. Different features (pits and furrows), generated by different extraction techniques (anchor suction dredging and trailer hopper suction dredging, respectively) were detected at both of the study sites: Tromper Wiek 1 (sandy gravel seabed) and Tromper Wiek East (sandy seabed). Regeneration varies, depending upon the material extracted and the mining technique applied. In general, it is rapid during the first years following the extraction, becoming almost undetectable over a longer period of time. However, the marks are still detectable after more than 10 years, since they were generated.

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