Water-related problems have always represented a tough challenge for human beings throughout history. Their wide collection of issues, ranging from water quality degradation to stormwater management in urban catchments, reflects the controversial power of this fundamental resource, vital for human life and in some cases destructive if not well controlled. Especially, in a context where the climate fluctuations and the development of urban areas are increasing their impacts on both streamflow and water quality, water management solutions are acquiring much more importance day by day. In particular, the rising in the frequency of extreme rainfall events justifies the need for an improvement in the actual stormwater management systems of the cities.