Social Stormwater : Treating the stormwater through blue-green social strategies in Hagsätra, Stockholm

Abstract: This project is established on the following questions:  How can Stockholm adapt to increasing extreme rainfall events through combined stormwater drainage strategies?How can social sustainability be implemented in stormwater treatment?How can stormwater and social design educate the public about the importance of clean water bodies?  Global and national trends show that annual precipitation is increasing, and extreme weather events are becoming more common. Urban landscapes are more susceptible to cloudburst flooding due to impervious surfaces. Additionally, when the stormwater runoff reaches water bodies, it can pollute its recipients unless the stormwater is treated beforehand. Stockholm is an urbanised area with several surrounding water bodies of various sizes that are burdened by human activity, and the water quality in most water bodies is currently at an unsatisfactory ecological and chemical level.  The project site has been determined through mapping, where the accumulation of stormwater flows have been mainly considered. Another important factor is the socio-economically vulnerable aspect, to be able to tackle the social sustainability aspect. For this project, the lake Magelungen is the water body targeted, and the connected site is Hagsätra. This project is using a holistic approach to stormwater management, where the design of recreational spaces, such as parks and playgrounds, can be utilised to serve an ecological as well as a social purpose. A set of toolboxes have been set forth through research and case studies which have been contextualised in the site through sequences and strategies.