Green Deal

Cities as leaders in Green recovery - European projects and networking in Rakvere

Northern Estonia, Estonia, Estland

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  • Adaptation to climate change
  • Nature-based solutions and green infrastructure (e.g. tree-planting, nature regeneration and greening of urban areas.)

Improving the aquatic environment of Soolikaoja is part of the ten-year project "LIFE IP CleanEST". Plants were planted on 11 floating islands, which clean the water from pollutants through their roots.

A first in Europe! Estonia's floating islands for cleaning water.

Groundwater is overloaded with nitrates in Soolikaoja creek in Rakvere. There are also Soviet-era influences from oil products that seep into the water from the soil.

The idea of using floating islands was primarily based on the fact that Soolikaoja has been transformed into dam lakes in several places throughout the city, which are suitable for using such technology.

Secondly, the solution is relatively inexpensive and works passively. As a bonus, the islands offer new habitats for aquatic life and nesting sites for birds

Floating islands were built from 200 mm PEM pipes which were connected to create octagonal and rectangular frames, the bottom of which is made of metal mesh.
Coconut mat and rock wool were installed on the net as the soil for the plants. The plants were planted so that the roots reach the water if groundwater is overloaded with nitrates. Closest examples for Europe are Australian experiences with clean water.

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