La gestion intégrée des eaux pluviales - AQUA-ADD Interreg IVC ...

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Installations
supporting
leisure
activities
and new
landscapes
Differentiated
approaches
PARC DU VALLON
LA DUCHÈRE LYON 9 e
Abandoned for years, the Parc du Vallon has had its role
as the 4 th green lung of the city of Lyon restored, in the context
of the Major City Project of La Duchère. The opening up of
the Ruisseau des Gorges and the works to limit the flood risk
have all contributed to its rehabilitation.
The techniques selected
Preliminary studies allowed the major flood risk of the
Ruisseau des Gorges in La Duchère to be identified with
regard to the districts of Lyon Vaise immediately downstream.
Although underground for more than 50 years, this stream
continues to drain spring water and run-off water from
the entire sector of La Duchère and the plateau of the
Sauvegarde. The transformation of the entire district and,
in particular, the stream’s separation from the sewerage
network mean that polluted discharges to this stream
can be halted and its status as an original natural
environment restored. The redevelopment of the Parc
du Vallon is also a unique opportunity to use this space
during periods of exceptional rainfall and to provide
substantial protection against floods for the low-lying areas
of Lyon. All the developments have been designed in close
consultation with the population of the district who are
delighted to see their stream and its meanderings
once again.