Østerøy - New island in the Oslo Fjord - Consept development
An island that purifies the fjord with Norwegian oysters and precious woods.
As one of three invited participants, LINK Landskap participated in the development of a concept project to establish a new island in Oslofjord. This unusual project was established at the request of Oslo Port, who wanted to investigate the possibility of using excavated soil from the construction of the Follobanen railway line to create a new island in Bunnefjorden.
LINK realised that a landscape-ecological approach would make it possible to establish a new, well-functioning archipelago that could contribute to improving the water quality in the fjord. The island's coastline and terrain was adapted to the characteristic shape of the existing islands. The advantage of constructing a varied topography, both above and below the water, is that a variety of micro-climatic environments can be established. For example, blasted rock is a particularly good material for creating artificial reefs for marine life under the water.
LINK has focused on identifying reef communities of species that have essential characteristics for clean air, soil and water, and which occur in either the inner Oslofjord or have been present in the area previously, including those near-extinct species of oysters (Ostrea edulis) and common eelgrass (Zosteria marina). Oysters contribute naturally to purifying the water. It is also edible and can be harvested. Increased growth of eelgrass will increase oxygen production in the sea, bind particles, provide nutrition and good hiding places for fish, molluscs and crayfish. On the land it is proposed to establish deciduous forest, both because it is endangered due to the development and growth of strong species, such as spruce trees. The deciduous forest will provide a habitat for insects, birds and animals, while the foliage will produce a nutrient rich soil. Sea meadows will be established to provide good nesting areas for birds.
The land is shaped to ensure accessibility to Østerøy for everyone. This adds variety to the landscape and makes it ideal for swimming, canoeing, fishing, marine allotment gardens and boating. The buildings are simple and energy-efficient with a Nordic character. These solutions have a clear educational potential and provide opportunities for safe access to the water.