Bilan et perspectives sur la gestion des eaux pluviales à la parcelle sur le territoire des Hauts-de-Seine: Points forts, réticences et axes d'amélioration

In 2005, the département council of Hauts-de-Seine approved its sewer system master-plan for the next 15 years. In a highly urbanised context, the département conducts a voluntary policy for stormwater control aimed at reducing combined sewer overflow and the flooding risks. To improve the efficiency of its policy in the Hauts-de-Seine county, urban managers and sewer system owners' commitment is needed. Therefore, the département has developed several tools to promote a consistent policy for sustainable stormwater management. After seven years, the département has wished to initiate a review of its policy through a series of interviews of its partners: local authorities and developers. These interviews have shown that stormwater regulation rules are now included in most municipalities' sewer system regulation documents and land use plans. Although many new buildings and developments were exemplary, it seems that some reticence sometime remains about stormwater source control and also access in private estates for checking the stormwater collecting system. Continuing a strong and long-lasting policy as well as improving stormwater source control will contribute to update our sewer system master-plan.