General National Id France_11 Summary The city of Fourqueux (4000 inhabitants) has redesigned its urban space to build social housing. A plot of land has been set up at the heart of this area to collect and manage rainwater from the requalified area. Called water garden, the park collects water from 1.7 hectares of permeable and impervious area to allow it to infiltrate through a succession of temporary basins and a permanent one. It thus avoids the direct discharge of this rainwater into the separative network connected to the Seine. The water garden also acts as a natural space in the heart of a residential area, and allows the history of the municipality to be highlighted through cultural activities and the permanent display of old agricultural machinery. Reviewed by Fribourg-blanc Light or indepth? In-depth The in-depth description of the case study mnre_rex10_jardin_des_eaux_fourqueux.pdf Location description The commune of Fourqueux is located in the Yvelines, and has 4000 inhabitants. In 2014, the center of the municipality of Fourqueux underwent an urban redevelopment operation, consisting of the creation of 80 housing units and the renovation and restructuring of the municipal social and cultural center. In addition, this work has led to the establishment of separate networks. The area under requalification covers 1.7 hectares. In the center of this area was a private garden of 3200 m² dating from the 1930s, abandoned and left fallow. It was acquired by the city with the objective of making it a local park. Stormwater management was initially planned through underground networks in the road network, before the construction of the water garden in the park was considered. The private garden was fallow, with natural biodiversity and no direct pressure. The subsoil of the area consists of very low-permeability green clays, which leads to the presence of several springs on the site. NUTS Code Île de France RBD code FRH-La Seine et les cours d'eau côtiers normands Transboundary 0 Source(s) Le jardin des eaux à Fourqueux, un projet de parc et une gestion de l’eau à l’échelle du centre-ville NWRM(s) implemented in the case study Swales Detention Basins Infiltration basins Longitude 2.064136 Latitude 48.887901 Site information Climate zone cool temperate moist Monitoring maintenance Monitoring requirements No monitoring requirements. Performance Biophysical impact assessement method No assessment methods or practices was used for assessing the biophysical impacts. Design & implementations Project scale Small Application scale City Installation date 2013 Age 6 Area (ha) 0.31 ha Design capacity description The park is able to manage 8 mm of rain Factors constraints 8% slope Favourable preconditions To be consistent with the city's desire to share urban space with natural spaces, it was necessary to integrate a hydraulic and ecological dimension into the urban space, in particular by managing rainwater over an area of 3 ha. The choice of these types of developments was important so that the artificialization of the area by housing was not associated with soil sealing (and therefore runoff and stormwater management by the sewerage network). Design contractual arrangement Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments Others (please specify in column H) Initiation of the measure Responsible Ville de Fourqueux Architects/Engineers Implementation Supporting Agence Bertrand Paulet Architects/Engineers Implementation Supporting Agence ATM Architects/Engineers Implementation Supporting SETU Lessons, risks, implications... Success factor(s) Success factor type Success factor role Comments Attitude of decision makers main factor Financing Financing type Comments Barrier Barrier type Barrier role Comments The prime contractor's proposal to consider stormwater management on site was a trigger for the project. However, the fact that work had already begun on the other areas of the site's requalification was a difficulty, given that the rainwater to be collected came from these areas. Many meetings were necessary to determine the possible interfaces in the water garden and other sites. The slope of the site represented a technical difficulty because it was not suitable for rainwater infiltration. The solution proposed by the project manager was the use of a system of successive basins in "Asian terraces" format. Driver Driver type Driver role Comments Financing share Financing share type Share Comments Policy, general governance and design targets Policy description The objectives of the project are: Manage 1.7 hectares of rainwater in the open air; Create a local square; Improvement of the living environment (thermoregulation, cultural site); Participation in integrated water resources management. Policy target Target purpose Policy pressure Pressure directive Relevant pressure Policy area Policy area type Policy area focus Name Comments Policy impact Impact directive Relevant impact Policy wider plan Wider plan type Wider plan focus Name Comments Policy requirement directive Requirement directive Specification Biophysical impacts Information on retained water The current rains are infiltrated, the heavier rains are partly infiltrated, the overflow joining the Seine. Photo gallery Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL