There is a growing commitment to climate change and focus on preserving and rehabilitating the blue-green corridors in Oslo. Over the last ten years, there has been ongoing work with reopening of the rivers in the
capital, but there is still a lot remaining in the rehabilitation of the city's blue-green corridors. Through this thesis, I want to gain knowledge about the ecological rehabilitation of rivers in the urban environment, with the main focal points being open stormwater management and increased biodiversity.
The thesis consists of three parts, Part 1 Theory and background for the thesis, Part 2 Data collection and analysis of Hovinbekken as a case study, Section 3.1 Registration and analysisof Jordal Idrettsplass and Hovinbekken, Section 3.2 Detailing the reopening of Hovinbekken and Helsfyrbekken at Jordal Idrettsplass.The first part addresses the background for the historical development of the closing of waterways in Oslo, climate change and the increasing focus on sustainable management of surface water, and the potential reopening of closed rivers and streams. Part two is a registration and analysis section concerning Hovinbekken and the possibility of reopening the closed parts of the stream. It illustrates a proposed solution, which ensures the blue-green connection between the forest and the fjord, and promotes biodiversity in the area. Part three is a case study of Jordal, and is divided into two sections. Part 3.1 is an analysis, resulting in a feasibility study for reopening of Hovinbekken and Helsfyrbekken at Jordal Idrettsplass. Part 3.2 is a design project, where the reopening is planned and illustrated.