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Stormwater retention tank
The rainwater retention and regulation reservoir of the Nou Barris Central Park is located between Paseo Urrutia and Calle Vilalba dels Arcs and has a depth of 5.3 meters. With a capacity of 18,000 cubic meters, its function is to protect the sewer network from heavy rainfall and to reduce the risk of flooding the area. Its shape is rectangular in plan (except for a chamfered corner), with a total length of 102 m and a width of 26.5 m. It is part of the network of deposits built in different parts of the city:

• University Zone 145.000m3 operational since Feb 2000
• Bori i Fontestà 93.000m3 operational since Feb 2000
• Joan Miró Park 70,000m3 operational since Sep 2003
• Doctors Dolsa 61.500m3 operational since Feb 2003
• Scheduled 80,000m3 operational since Mar 2004
• Industrial School 35,000m3 operational since Feb 1999
• Parc Central Nou Barris 18.000m3 operational since Mar 2003
• Diagonal Mar 17.500m3 operational since Feb 2003
• Parc del Poblenou 1,400m3 operational since Feb 2002
• Forum Square 1,000 m3 operational since Mar 2004
• TOTAL BARCELONA 522.400m3

All rainwater retention tanks in the city of Barcelona provide these benefits:
First of all, its holding volume allows a maximum reduction of rainwater flow, so that the outflow of the tank is much less than the inlet. This has very positive effects on the downstream sewer network, minimizing the risk of floods.
The second function is environmental: rainwater retention, which is heavily polluted due to runoff through the city, reduces its discharge to beaches, rivers and ports. After the rain, this retained water is released slowly, so it can be treated in the sewage treatment plant.
On the other hand, the water retained reduces its degree of pollution, as a result of the sedimentation caused by its retention.
The use of groundwater also supplies the irrigation needs of the Central Park of Nou Barris and feeds its sheets, since there is a system of collection and storage associated with the Rainwater Tank and distribution of groundwater. This water is used for cleaning streets, irrigation of green areas, feeding Central Park Lake and cleaning stormwater tanks.
At present, more than 700,000 m3 of groundwater are distributed in Barcelona each year, which means a saving of 10% of mouth water compared to the total consumed by the Barcelona City Council.

Automatically translated with Google Translate API.