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

4
Achievements
in the dense
urban centre
Integrated rainwater
management,
a principle developed
in the city
La Buire
A DISTRICT IN PART-DIEU (Lyon 3)
The challenge of this new dense district covering an area
of 5.5 hectares, situated in the city centre, consisted of
managing rainwater outside the combined sewer network.
An infiltration basin in the heart of the park at La Buire
The rainwater from the roofs and the run-off water from
the city blocks are routed to the basin through an underground
network. With its capacity of 870 m 3 , the basin serves for
the retention and percolation of the water. After percolation,
the water gets back into the water table. As for the run-off
from the roads, it is routed to the combined sewer network.
Designed as a moat around a green space for children
at the nearby school, rainwater management is fully
integrated in this public space.
The parts of this basin most susceptible to flooding were
designed to be impenetrable by means of more dense
vegetation. This has not stopped this area from becoming
the preferred adventure ground for 5 to 10 year-olds who
discover the joys of climbing and of games of hide-and-seek
in this protected space. The school, for its part, uses some
of the rainwater to water green spaces and supply ponds
with water.