Nacka: Screen basins and sun decks to manage stormwater and rapid urbanisation
Keywords: Stormwater management, pollution reduction, accessibility & inclusivity, public space, people-centred design, ecosystem services
The Challenge: Rapid urbanisation puts pressure on stormwater management and disturbs the natural environment
The municipality of Nacka is located between central Stockholm and the Stockholm archipelago, providing not only urban life, but also a beautiful natural landscape attracting a lot of people. The municipality consists of a group of islands connected by bridges and surrounded by lakes and waterways.
The existing developments in the municipality lack proper stormwater treatment, resulting in insufficient water quality in the receiving lake, Järlasjön, which is in violation of the European Water Framework Directive.
As Nacka’s rapid urbanisation puts even higher pressure on the stormwater management, increased pollution is expected in Järlasjön. The lake also lacks space on land for end-of-pipe stormwater solutions, and nearby roads cause noise and an unpleasant environment, despite the lake’s scenic beauty.
Additionally, the inaccessibility of the lake, the overgrown shoreline and the lack of local urban parks and bathing places contribute to making the environment unpleasant, despite the fact that the natural landscape is one of the reasons that inhabitants choose to live in Nacka.