An assessment of the potential environmental impact of large-scale sand-dredging for the building of artificial islands in the North Sea
de Groot, S.J. (1979). An assessment of the potential environmental impact of large-scale sand-dredging for the building of artificial islands in the North Sea. Ocean Manag. 5(3): 211-232
In: Ocean Management. Elsevier Scientific: Amsterdam. ISSN 0302-184X; e-ISSN 1872-776X, meer
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| Trefwoorden |
Chemical compounds > Organic compounds > Hydrocarbons > Unsaturated hydrocarbons > Aromatic hydrocarbons > PCB
Chemical elements > Metals > Heavy metals
Developmental stages > Larvae
Dredging
Environmental impact
Fauna
Fauna > Aquatic organisms > Aquatic animals > Fish
Fisheries
Nutrients (mineral)
Plankton
Properties > Physical properties > Turbidity
Sediments > Clastics > Sand
Water bodies > Coastal waters
Water quality
Marien/Kust |
| Abstract |
The building of artificial islands is contemplated in the coastal waters of the Netherlands. The potential environmental impact of a large-scale sand-dredging (1 o 109 m3) is evaluated. The most suitable mining methods, the effect on water quality-turbidity, the disturbance of the balance between bottom sediment and water column in relation to heavy metals, nutrients and PCB's are discussed, as well as the effect of dredging upon plankton, bottom fauna, fishes and on larvae and young stages of sea animals in general. The recovery time for the bottom fauna is estimated to be about three years. The consequences for the fisheries are mentioned, as the Netherlands coastal zone plays a very important role in the life of the North Sea species. This is related to the Dutch shrimp, plaice and sole fishery. An estimation of the yearly damage to the fisheries during the building phase is made (Dfl. 500,000 per year). The building time for the island would be about 8 years. The island would cause damage to fisheries, in respect of a permanent loss of catches of Dfl. 10,000,000. |
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