Existing climate scenarios show that in the future we will have longer dry periods and more intense rainfall, which increases the vulnerability of our systems for drinking water supply and sewage management. Islands are sensitive to coming climate change as they have small water resources and rarely have a municipal water supply. Today's water systems are linear, where purified wastewater is returned directly to nature. To get sustainable sewage management can a water use be introduced that mimics the hydrological cycle. The purpose of the study is to investigate the water supply, water and...