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Réseau d’eau non potable parisien et valorisation des eaux d’exhaure, entre limites techniques et jeux d’acteurs complexes

Abstract : The increasing pressure on water resources is bringing more and more actors to diversify their water resources, or to seek alternatives for uses that do not require drinking water quality. The City of Paris has delegate in 2009 the management of its non-potable water network (RENP) to the public enterprise Eau de Paris. The 1,800 km network is used for cleaning of streets, sidewalks, flushing of sewers, feeding of lakes and watering of green spaces, uses accounting for approximatively 200,000m3/d or 20L/d/m². The RENP is currently fed in average for 80% by the canal Ourcq and for 20% by the river Seine. To optimize water management in Paris and reduce the pressure on its water resources, the RENP could be fed in the future with other resources such as rainwater, discharges from swimming pools or seepage water. The seepage water is clear infltration water, evacuated to ensure the exploitation of underground infrastructure such as subway and underground car parks. Its volume can cover up to 14% of the needs of the RENP. However, sulphate contents around 700mg/L and its high conductivity of 1,900 μS/cm, together with source variability, pose numerous technical, organizational and institutional challenges. The article deepens these aspects through the example of the biggest Parisian discharge of the underground car park Meyerbeer.
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https://hal-upec-upem.archives-ouvertes.fr/hal-03311305
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Submitted on : Friday, July 30, 2021 - 7:05:55 PM
Last modification on : Saturday, August 14, 2021 - 10:17:27 AM

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Martin Seidl, Bich-Thuy Claire Trinh, Hortense Bret, Laurent Moulin, Jean Baron, et al.. Réseau d’eau non potable parisien et valorisation des eaux d’exhaure, entre limites techniques et jeux d’acteurs complexes. Techniques Sciences Méthodes , ASTEE/EDP Sciences, 2020, pp.131-153. ⟨10.36904/tsm/201912131⟩. ⟨hal-03311305⟩

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