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Santander Case Study

Santander, Spain

Led by the University of Cantabria & Aqualia

Local stakeholders: SEO/BirdLife, Municipality of Santander, IH Cantabria

The selected area for the case study in Santander is called, “Las Llamas basin”. A hybrid system already exists of 7.3 kmthat includes two Nature-Based Solution: a wetland and a permeable car park. It is complemented by two conventional systems: a pumping station and a treatment plant.

The main challenge today in the area is the potential collapse of treatment systems due to overflows (120 stormwater overflows event/year and a volume of 240 000 m3/year) and the gap in knowledge concerning Contaminants of Emerging Concern (CECs).

Aerial view of Las Llamas Park

Las Llamas Park

Wetlands at Las Llamas Park


Study different types of permeable surfaces (pavements, green roofs or gardens), and increase the wetland’s surface to maximise its potential benefits.

Sample water in the inlet and outlet of the wetland to control water quality and ecosystem well-being and at the car park to identify the presence of CECs.

Study the two traditional sites connected to the sewer system: pumping station and treatment plant.

Characterise the entire urban drainage system and model positive consequences of the connection of new NBS.

Solutions implemented

High-resolution methods for suspect and NTS for CECs

Developed by VCS

Online sensors for water pollutants

Developed by INL Laboratory

MCDA applied to dynamic design of hybrid urban drainage solutions

Developed by the University of Cantabria

DSS applied to hybrid urban drainage solutions, ABM and social network analysis

Developed by ITG


Nicolás Morales (Aqualia)
Jorge Rodríguez (UniCan)

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