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Grenoble - Urban park Ouagadougou (France)

Grenoble – urban park Ouagadougou: a 1 ha urban park with reed bed filters and surface flow wetlands collecting and treating stormwater runoff from the roofs of buildings and from adjacent roads in order to meet irrigation needs of the park and to reduce discharge of stormwater into the municipal sewer system. This project was the laureate of the NOVATECH 2013 international conference of sustainable urban drainage award



Additional Info

In operation since: 2008

Type of wastewater treated: Stormwater (runoff)

Watershed: 4,700 m²

Location: Grenoble, Rhône Alpes, FRANCE

Client: City of Grenoble

Stage 1 type: reed bed filter

Stage 2 type: surface flow wetland

Cost: 1, 700,000.00 €

Designed by SINBIO



 The Ouagadougou park, with an area of over 1 ha, was built in Grenoble en 2007 and 2008. Storage and treatment of stormwater (runoff) from the roofs of buildings and adjacent roads was integrated into this park in order to meet irrigation needs of the park and to reduce discharge of stormwater into the municipal sewer system. 



 Stormwater runoff flows along the following path:

·         Stormwater from the roofs of the buildings is collected on the surface and directed towards the park.

·         Stormwater run-off  from adjacent roads flows into reed bed filters upstream of the park

·         The two streams are collected, filtered and divided by “nozzles” into several irrigation ditches. These ditches wind through gardens with plantations or playgrounds

·         In the end, the surplus water is collected in the heart of the park in a wetland area which also provides the function of flood storage with a regulated, throttled discharge of the excess water into the municipal sewer.



 Two types of recreational uses have been created: formal playgrounds with special outdoor equipment and informal playgrounds on the grass areas around the “nozzles”. At the same time, a habitat for biodiversity is created in the center of the town.




Additional Info

  • Hydraulic load: m³/day
  • Organic load (PE): PE
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GWT events @ ICWS2022




7/11  9am  Anacleto Rizzo   (Keynote)

Wetland community expertise in the new Nature-Based Solution and Circular Economy vision: links and new research and design trends


7/11  10.40am  Dion van Oirschot

MULTISOURCE: Aerated wetland treating black and grey water for reuse at campsite Belgium


07/11   11:40am  Heike Hoffman

The potential of the French Wetland System for reuse - Results of a long-term project in the Peruvian arid coast area


7/11  4pm Heike Hoffman

Operational experiences with a sludge treatment wetland as part of a municipal WWTP in Brazil


7/11  4.30pm Fabio Masi

Water Projects Europe: NICE / MULTISOURCE


9/11  2pm Steen Nielsen

Treatment of industrial sludge in a pilot Sludge Treatment Wetland planted with Phragmites australis and Schenoplectus californicus


9/11  2pm Riccardo Bresciani

Reed beds for drying sludge from a winery wastewater treatment plant in Spain: the WETWINE project


9/11   4.40pm  Taxiarchis Seintos

Application of a full-scale UASB and two-stage constructed wetland system for water reclamation and nutrient recycling of domestic wastewater in arid areas


9/11  5pm Simos Malamis

Investigation of the use of different filling materials in unsaturated vertical flow constructed wetlands for the treatment of UASB effluent from domestic wastewater

T. Seintos, E. Statiris, F. Masi, C. Noutsopoulos, S. Malamis


9/11 5pm Scott Wallace

Practical aspects in the determination of first-order removal rate coefficients (k) for horizontal flow treatment wetlands


10/11 11.20am Fabio Masi

Electroactive and intensified pilot-scale constructed wetlands for the treatment of high loads of septic tank effluent


10/11 2.20pm Alain Petitjean

Intensified French Treatment Wetlands - Influence of operating parameters on nitrogen removal


10/11 4pm  Andy Freeman

Treatment of de-icer contaminated runoff at a UK airport using intensified Nature Based Solutions - A 10-year operational performance review



P4: Coupling French Reed Bed and Short Rotation Plantation for developing circular economy of wastewater in India: A case of PAVITR prototype / Anacleto Rizzo

P39: Constructed wetlands for the treatment of combined sewer overflow upstream of centralised wastewater treatment plants / Chiara Sarti