Annualisation des volumes des services d'eau potable

Renaud, Eddy; Lapuyade, F.; de Grissac, B.; Brémond, Bernard; Réseaux épuration et qualité des eaux  ; Centre national du machinisme agricole, du génie rural, des eaux et forêts; SMEGREG BORDEAUX ; Partenaires IRSTEA ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture -Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture

Annualizing metered volumes in Water Balance | Annualisation des volumes des services d'eau potable

2009

Renaud, Eddy | Lapuyade, F. | de Grissac, B. | Brémond, Bernard | Réseaux épuration et qualité des eaux (UR REBX) ; Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) | SMEGREG BORDEAUX ; Partenaires IRSTEA ; Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)

[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]TED [Axe_IRSTEA]TED-NETWATER

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International audience

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anglais. SMEGREG is a public structure in charge of water saving management in the Département of Gironde in the South West of France. SMEGREG has built an information system gathering the water balance components of all the utilities of the region. The data analysis highlights many disparities in the methods used by the different utilities to calculate the annual volumes. By SMEGREG's request, Cemagref has studied in detail the practices of five drinking water utilities. We call the estimation procedure annualization of the volumes. The annualization process can be split in three elementary steps: - determination of the representative date of customer meter readings; - readjustment of main meters volumes; - readjustment of metered consumption volume on the calendar year. For each step, several methods can be considered. They have been applied to each utility under study. These calculations show that the annualization methods have a strong impact on the volume estimates. At the end of this study, SMEGREG made two strong recommendations to data providers: - the annualization methods must be identified, and all the calculations must be reproducible; - The same set of methods should be used every year.

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