Analysis of a rainwater collection system for domestic water supply in Ringdansen, Norrköping, Sweden

The possibilities for implementing a rainwater collection system in Ringdansen, a residential area in Norrköping, Sweden, have been explored by analysing four scenarios for using rainwater in a dual water supply system to supplement drinking water. A computer model has been generated to quantify the water saving potential of the rainwater collection scheme. The performance of the rainwater system is described by its water saving efficiency (WSE). Standard and low water consumption appliances have been taken into account in evaluating WSE and water conservation. According to the analysis, suggested rainwater tank sizes are presented.