Coastal traffic

Coastal traffic includes commercial and recreational traffic. The negative effects of coastal traffic are especially visible in the archipelago, where the wakes create water streams and underwater swirls, as well as pressure and suction effects, which causes shoreline erosion and has damaging effects on soft bottoms and meadows of eelgrass, in particular. These effects can be minimized by regulating speed and by carefully planning the waterways in the archipelago. Coastal traffic also cause air pollution, oil spills and waste pollution. Recreational traffic has mostly local effects. Still, the recreational traffic in Finland is at its peak at the same time when the ocean is most biologically active, which increases the risk of negative effects on the environment.

Image: Cargo ship off the coast


Lundberg, C. et al (2012). Undervattensmiljö i Norra Östersjön – Viktigt att tänka på vid havsnära planering. Närings-, trafik- och miljöcentralen, Helsingfors.