The sustainable management of water resources is an extremely topical subject in today’s world. This is especially true in highly urbanised metropolitan areas, where land use and territorial fragmentation have greatly increased difficulties in the management of meteoric water. Water resources are under pressure both because of the decrease in overall availability and an increase in demand in densely populated areas. The biggest concerns, however, derive from extreme weather events, because of their direct impact on the territory, increasing the risk of floods and causing a decline in agricultural productivity. New and updated data from EASAC (European Academies Science Advisory Council)(1) demonstrates how extreme weather patterns have been more frequent in the last 36...