1. Background

Increasing urbanization by development has led to higher impervious surfaces because the natural landscape is replaced by paved areas. Consequently, the urban areas loses its ability to absorb rainwater and much more of it turns into surface water runoff, which is directed into surface water drainage systems and sewers, often overloading them and causing floods.

Sustainable urban drainage systems (SUDS) is a new approach of the water structure in urban development. Its philosophy is about maximising the benefits (surface water is a valuable resource) and minimizing the negative impacts of surface water runoff from developed areas.

2. Viability of the application of SUDS in the city of Sant Cugat del Vallès

 A specific research project promoted by the city of Sant Cugat del Vallès has proved the viability of the application of SUDS systems in its territory integrating them into the urban landscape, which allows protecting people and properties from increasing flood risk, increasing the water quality and replenishing depleted groundwater levels.

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