NORIS : No Rainwater in Sewers
Start date: Feb 25, 2004,
End date: Jun 29, 2007
Noris had four concrete aims:• Introducing modern sustainable technologies in the area of rainwater disconnection;• Testing and adapting technologies developed in pilot projects; • Building awareness and understanding of sustainable planning and management of rainwater runoff, both among spatial planners and politicians;• Producing an Inspiration Book, to be spread amongst spatial planners. Achievements: The project addressed the problem of improving water quality and to reduce stormwater/sanitary sewage related problems by reducing excess water in sewers. The aim was achieved by introducing modern sustainable technologies such as innovative no-dig techniques and source control measures.The NORIS project achieved its desired outputs, results and impacts by finding innovative solutions. As an example, the project carried out field trials using an innovative technique, developed in Sweden, to separate drain and rain water from the sewer system. The reconstruction of the old sewage systems to the new 2-in-1 method can be carried out without extensive digging work as a flexible liner is installed in the old water pipe. In this way greater disturbances in traffic are avoided. The new system saves both energy from pumping extra water and chemicals to treat the water.
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