title: How much drinking water can be saved by using rainwater harvesting on a large urban area? application to Paris agglomeration.
abstract: This paper is based on a prospective scenario of development of rainwater harvesting (RWH) on a given large urban area (such as metropolitan area or region). In such a perspective, a new method is proposed to quantify the related potential of potable water savings (PPWS) indicator on this type of area by adapting the reference model usually used on the building level. The method is based on four setting-up principles: gathering (definition of buildings-types and municipalities-types), progressing (use of an intermediate level), increasing (choice of an upper estimation) and prioritizing (ranking the stakes of RWH). Its application to the Paris agglomeration shows that is possible to save up to 11% of the total current potable water through the use of RWH. It also shows that the residential sector offers the most important part because it holds two-thirds of the agglomeration PPWS.
authors.affiliation: LEESU (Laboratoire Environnement Eau et Systèmes Urbains), Université Paris Est-Ecole des Ponts Paris Tech-, 6-8 avenue Blaise Pascal, Cité Descartes-Champs sur Marne-77455, Marne-La-Vallee Cedex, France E-mail: belmeziti@gmail.com.
authors.forename: Ali
authors.initials: A
authors.lastname: Belmeziti
authors.affiliation: LATTS (Laboratoire Techniques, Territoires et Sociétés), Université Paris Est -Ecole des Ponts Paris Tech-, 6-8 avenue Blaise Pascal, Cité Descartes-Champs sur Marne-77455, Marne-La-Vallee Cedex, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Coutard
authors.affiliation: LEESU (Laboratoire Environnement Eau et Systèmes Urbains), Université Paris Est-Ecole des Ponts Paris Tech-, 6-8 avenue Blaise Pascal, Cité Descartes-Champs sur Marne-77455, Marne-La-Vallee Cedex, France E-mail: belmeziti@gmail.com; CSTB (Centre Scientifique et Technique du Bâtiment), Université Paris Est -Ecole des Ponts Paris Tech-, 6-8 avenue Blaise Pascal, Cité Descartes-Champs sur Marne-77455, Marne-La-Vallee Cedex, France.
authors.forename: Bernard
authors.initials: B
authors.lastname: de Gouvello
mesh_terms: D003247:Conservation of Natural Resources / Q000379:methods*; D060766:Drinking Water; D006798:Housing; D008962:Models, Theoretical; D010297:Paris; D011446:Prospective Studies; D011891:Rain
chemical_list: D060766:Drinking Water