Abstract
Norway is a country with abundant water resources. Rainwater harvesting and stormwater utilization (RWH) has not been a central topic in Norway for a very long time. In recent years, however, we have experienced more frequent extreme storm events and less precipitation over other periods, because of climate change. We therefore need solutions to handle both too much and too little water problems. Rainwater harvesting has been recognised as one of the efficient measures for municipal stormwater management (for example in Oslo) and one of the sustainable nature-based solutions for flood control and drought mitigation and diverse social and environmental benefits. Despite of this awareness, the progress of rainwater harvesting in Norway is not yet much implemented in practices. This paper aims introduces international experience on rainwater harvesting and utilization from several selected countries in Europe and other parts of the world, thus paves the ground for use of the rainwater resources smartly and sustainably, and build Norwegian cities to be more water resilient and water smart.