New integrated holistic concepts for urban water management systems are examined and are more and more applied in a larger scale in Germany.
These systems react to changing environments in a flexible way under consideration of economic and ecological aspects. They are summarised under the notion "New Alternative Sanitation Systems" (NASS).
Further information with regard to NASS you can find here:
DWA - (German Association for Water, Wastewater and Waste) Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e.V.