*3.1. Characteristics of the Study Area*

Barcelona has a Mediterranean climate, with gentle winters and mild summers. Barcelona soil cover experienced massive urbanization through the last century. Nowadays, the city land-use is about 80% of impervious areas and 20% of pervious areas. This morphology causes a brief time of concentration in catchment areas. As a result, medium and heavy storm events produce quick stormwater storage in flatland areas, provoking urban flash floods.
