Sewer networks represent an important asset that requires a good management according to a long term integrated policy, which should take into account the state of sewer pipes, their environment and...
Cherqui, F., Werey, C., Ibrahim, M., Closet, J.F., Le Gauffre, P.
Asset management is an increasing concern for wastewater utilities and companies. Indicators are developed for supporting the definition of investigation and rehabilitation programs. These indicators...
Werey, C., Dorchies, D., Mellac Beck, I.
/ En 2003, le Conseil Général du Bas-Rhin (CG67) a réalisé un inventaire exhaustif de l'ensemble des réseaux d'assainissement du département (hors Communauté Urbaine de Strasbourg CUS), à la...
Werey, C., Campardon, M., Vilette, J.P., Mellac Beck, I.
/ En 1999, l'Assemblée des Départements de France (ADF) a décidé de réaliser des inventaires des réseaux d'eau potable dans 7 départements pilotes pour explorer la faisabilité d'un inventaire...
Cherqui, F., Werey, C., Ibrahim, M., Le Gauffre, P.
Asset management is an increasing concern for wastewater utilities and companies. Indicators are developed for supporting the definition of investigation and rehabilitation programs. These indicators...
Les outils de la gestion patrimoniale des réseaux d'alimentation en eau potable (2008)
/ La mise en place d'une planification du renouvellement des réseaux d'eau potable pose les questions du rythme de renouvellement et de la hiérarchisation des travaux. Le Cemagref travaille sur ces...
A Multi-Objective Optimisation Approach for Water Pipes Renewal Planning (2008)
Water utilities ensure the delivery of water to consumers through a pressured network composed of several hydraulic components: reservoirs, pipes, valves, and pumps. A right maintenance policy that...
Réduction des fuites dans les réseaux AEP : année 2008 (2008)
Brémond, B., Campardon, M., Renaud, E., Werey, C.
/ Le Cemagref s'est engagé sur la base de la fiche 28 bis de la convention générale entre l'ONEMA et le Cemagref à effectuer en 2008 : - Une démarche de définition des actions à mener dans le...
Water pipes renewal using multi-objective optimization approach (2008)
Nafi, A., Werey, C., Llerena, P.
Water utilities ensure delivery of water to consumers through pressured network consists of several hydraulic components: tanks, reservoirs, pipes, valves and pumps. According to technical and...
Sewer asset management tool: dealing with experts' opinions (2008)
Werey, C., Cherqui, F., Ibrahim, M., Le Gauffre, P.
Asset management requires the development of performance indicators (PIs) and decision procedures. Within the French RERAU methodology each rehabilitation criterion is assigned a grade out of four...
Decision support model for water. Pipes renewal programming (2007)
Water utilities ensure the delivery of water with the help of networks consisting in long life asset. An integrated asset management policy must be done to improve the performance of assets and...
Ibrahim, M., Le Gauffre, P., Cherqui, F., Werey, C
This paper addresses methodological problems regarding the use of visual inspections for assigning an asset to a condition grade. The study deals with sewer networks; however some results may be...
Sewer asset management: from visual inspection survey to dysfunction indicators (2007)
Ibrahim, M., Cherqui, F., Le Gauffre, P., Werey, C.
Asset management is an increasing concern for wastewater utilities and companies. Criteria are developed for supporting the definition of investigation and rehabilitation programs. Dysfunction...
Werey, C., Torterotot, J.P., Sousa E Silva, D., Barbier, R., Konig, A., Pereira, A., ...
Rehabilitation of sewer networks has to serve various objectives, both in terms of present general performance, and in terms of long term sustainability. Part of these stakes are external to the...
/ Cette communication fait le point sur les chiffres clés d'évaluation des besoins en France.
/ Cette communication fait le point sur les départements pilotes des inventaires lancés en 2000 et des suivants : Calvados, Savoie, Meuse et présente plus précisemment la démarche du Bas-Rhin.
Nafi, A., Werey, C., Llerena, P.
/ L'approche développée cherche à proposer un outil d'aide à la décision pour le gestionnaire du service de l'eau, permettant d'assurer une gestion durable du réseau d'alimentation en eau...
Scheduling water networks renewal using hybrid optimization model (2006)
Nafi, A., Werey, C., Llerena, P.
Through a bibliography review of works treating of renewal and rehabilitation of water distribution network, we identified a set of variables and factors that should be taken into account along the...
Scheduling of water distribution systems using A multiobjective approach (2006)
Nafi, A., Werey, C., Llerena, P.
Water utilities ensure the delivery of water to population with the help of networks and plants, which allow transport and treatment of water from the source to the end users. We focus on the...
Specific Model for rehabilitation scheduling of water distribution systems (2006)
Nafi, A., Werey, C., Llerena, P.
The aim of our work is to propose a decision tool trough an optimization model considering damages prediction on pipes taking into account technical, economical and financial constraints. The model...
Renaud, E., Werey, C., Burkhardt, D., Boisson, O.
/ De nombreuses collectivités départementales sont confrontées à la question de leur intervention dans le financement du renouvellement des réseaux d'eau potable. Cette préoccupation a...
Werey, C., Mellac Beck, I., Villette, J.P.
In 1999, the association of French Departments decided to make pilot-inventory operations on the water networks in 8 Departments in order to explore the feasibility at this scale. The objective was...
Werey, C., Dorchies, D., Mellac Beck, I.
The Council of Bas-Rhin county in the east of France is developing an active policy of computing data on water management and water related utilities (including networks). Following a first inventory...
Rehabilitation of sewer networks : addressing socio-economic impacts in the CARE-S project (2006)
Werey , C., Torterotot, J.P., Sousa E Silva , D., König, A., Pereira, A., Montginoul, M.
Rehabilitation of sewer networks has to serve various objectives, both in terms of present general performance, and in terms of long term sustainability. Part of these stakes are external to the...
/ Etude de faisabilité sur les données 67 des dysfoctionnement estimés à partir des inspections video de la méthodologie RERAU 5/6.
Situation des réseaux en France : les besoins, les attentes (2006)
/ Les synthèses récentes réalisées par l'IFEN et l'OIEau donnent une vue générale du patrimoine français des réseaux de distribution d'eau potable et d'assainissement ainsi que de leurs...
Gestion patrimoniale des réseaux d'eaux usées : l'approche du Département du Bas-Rhin (2005)
/ Le département du Bas-Rhin a lancé en 2003 un inventaire départemental des réseaux d'assainissement suite à celui réalisé en 2000 sur les réseaux d'eau potable comme l'un des 8...
Werey, C., Torterotot, J.P., De Sousa, G., Konig, A., Peirera, A., Montginoul, M.
Knowledge and assessment of social and economic external costs can be useful for assisting decision-making in sewer network rehabilitation. External impacts of both failures and rehabilitation works...
Brémond, B., König, A., Le Gat, Y., Saegrov, S., Torterotot, J.P., Werey, C.
Started in October 2002 and funded by the European Commission for 3 years, the CareS project (Computer Aided REhabilitation of Sewer networks) aims at providing entities involved in sewer system...
Werey, C., Lample, M., Breysse, D., Schoefs, F., Vasconcelos, E., Le Gauffre, P.
/ Les gestionnaires de réseaux sont de plus en plus préoccupés par l'état de leurs réseaux du fait du vieillissement de l'infrastructure, de l'évolution des contraintes environnementales et...
Water pipe maintenance: repairing or renewing (2004)
The fourth of the French water distribution network is estimated as being more than 60 years old. Therefore, many rehabilitation or renewal works seem to be necessary in the next future to keep this...
Sewer rehabilitation with the right technology (2004)
Baur, R., Kropp, I., Werey, C., Montero, C.
The right sewer rehabilitation technology, in economic as well as in technical terms, is chosen from a defined catalogue of technologies fulfilling the requirements under specific local conditions....
/ le département du Bas-Rhin a réalisé en 2000 un inventaire exhaustif de ses réseaux d'eau potable et en 2003 de ses réseaux d'assainissement. Cette communication présente les différentes...
Rehabilitation of water networks: analysis of the decision making processes (2004)
Torterotot, J.P., Rebelo, M., Werey, C., Craveiro, J.
The European Project CARE-W (Computer Aided Rehabilitation of Water Networks), which is supported by the European Commission, has created and tested a prototype of decision support system (DSS) for...
Réhabilitation des réseaux d'eau potable : les processus de decision et le projet Care-W (2003)
Torterotot, J.P., Werey, C., Rebelo, M., Craveiro, J.
European Project CARE-W (Computer Aided Rehabilitation of Water Networks), which is supported by the European Commission, gathers 10 research and development organisations as well as 13 water utility...
Werey, C., Lample, M., Breysse, D., Schoefs, F., Vasconcelos, E., Le Gauffre, P.
In France, sewers represent 250 000 km and half of them are more than 40 years old. In big cities the sewers are often large diameter civil engineering works where in the recent networks especially...
Renouvellement des réseaux d'eau potable : analyse des coûts (2003)
Werey, C., Janel, J.L., Weber, E.
Water utilities managers give more and more attention to the question of pipes renewal. Decision tools are necessary to allow pluri-annual planning of the renewal budgets but also to build out annual...
Baur, R., Herz, R., Kropp, I., Tuhovcak, L., Sulcova, V., Villanueva, A., ...
The right sewer rehabilitation technology, in economic as well as in technical terms, is chosen from a defined catalogue of technologies fulfilling the requirements under specific local conditions....
Water pipes maintenance: repairing or renewing? (2003)
/ Théorie de la valeur d'option appliquée à la problématique du renouvellemnt des réseaux d'eau potable.
Eisenbeis, P., Le Gauffre, P., Werey, C., Torterotot, J.P., Le Gat, Y.
The European project CARE-W (Computer Aided Rehabilitation of Water networks) aims to elaborate and test a suite of models and tools. Their objectives is to assist water services in establishing and...
L'enregistrement des défaillances pour améliorer la connaissance des réseaux d'eau potable (2002)
Eisenbeis, P., Werey, C., Laplaud, C.
Water pipe ages and failure rates force water services to consider carefully, the issue of renewal of their water network. A thorough diagnosis of current and predicted network condition is required...
Decision aid for water network rehabilitation (2002)
Le Gauffre, P., Baur, R., Laffrechine, K., Di Federico, V., Eisenbeis, P., Konig, A., ...
The work presented in this paper is carried out within the European project CARE-W (Computer Aided REhabilitation of Water networks. Contract N° EVK1-CT-2000-00053 5th FP), which deals with the...
Le Gauffre, P., Baur, R., Laffrechine, K., Torterotot, J.P., Werey, C., Eisenbeis, P.
Rehabilitation objectives of drinking water webs can be described by 2 points of view: internal (rehabilitation costs and direct profits measured); external (improvement of water performance of...
Le Gauffre, P., Laffrechine, K., Baur, R., Di Federico, V., Eisenbeis, P., Konig, A., ...
This report has been written in the framework of the European project called CARE-W, and especially in the modulus that was devoted to annual rehabilitation programmes for drinking water networks. It...
Optimal maintenance, rehabilitation, replacement scheduling (2002)
The fourth of the French water distribution network is estimated as being more than 60 years old. Therefore, many rehabilitation or renewal works seem to be necessary in the next future to keep this...
Renouvellement des réseaux d'eau potable : l'analyse des coûts (2002)
Werey, C., Janel, J.L., Weber, E.
/ Un quart du réseau français de distribution d'eau potable est estimé avoir plus de 60 ans. Le maintien en état de ces infrastructures laisse présager de nombreux travaux de réhabilitation ou...
Water pipes inventory at a county level: the case of the Bas-Rhin (2002)
Werey, C., Janel, J.L., Gandon, G., Mellac Beck, I., Villette, J.P.
France, inland, is divided in 96 administrative counties called Départements managed by a county council. Département of Bas-Rhin counts 1,026 million inhabitants on 4 755 km2. The county council...
Modélisation des pratiques de gestion patrimoniale des réseaux d'assainissement non visitable (2001)
Breysse, D., Le Gauffre, P., Werey, C., Lample, M., Laffrechine, K.
This work belongs to the national project RERAU, rehabilitation of urban sewer networks and especially to a workshop on non man entry sewers' asset management.An inquiry has been hold with a certain...
Politiques de renouvellement des réseaux d'eau potable (2000)
Renewal decisions have been considered as real investment decisions for a long time. Industrial Economy and Operational Research provide decision tools therefor. The question of the water network...
Maintenance des conduites d'eau potable : réparation ou renouvellement (2000)
In France, most of the renewal decision are taken with regard to the failure rate and in relation with road works. There is no long term planning. The paper presents an optimisation model helping the...
Ageing water mains: evaluating the optimal date of renewal (2000)
In France, most of the renewal decision are taken with regard to the failure rate and in relation with road works. There is no long term planning.The paper presents an optimisation model helping the...
Water mains maintenance: repairing or renewing? (2000)
In France, most of the renewal decision are taken with regard to the failure rate and in relation with road works. There is no long term planning.The paper presents an optimisation model helping the...
RENCANA: a decision tool for water pipes renewal (2000)
In France, most of the renewal decision are taken with regard to the failure rate and in relation with road works. There is no long term planning.The paper presents an optimisation model helping the...
Water pipes maintenance: to repair or renew (1999)
In France, most of the renewal decision are taken with regard to the failure rate and in relation with road works. There is no long term planning. The paper presents an optimisation model helping the...
Optimisation of the water mains renewal date (1999)
In France, most of the renewal decision are taken with regard to the failure rate and in relation with road works. There is no long term planning. The paper presents an optimisation model helping the...
Optimisation des échéances de renouvellement des réseaux d'eau potable (1998)
The water networks mean age leads to think that many investments will have to be done for renewal. Up to now, the management of renewal is essentially curative relying on the number of failures....
Ageing water mains: evaluating the optimal date of renewal (1997)
In France, the most renewal decisions are essentially curative one : the replaced pipes are those which break the most offently. Unfortunately due to the ageing process, this annual rate of renewal...
Optimisation des échéances de renouvellement des réseaux d'eau potable (1997)
The water networks mean age leads to think that many investments will have to be done for renewal. Up to now, the management of renewal is essentially curative relying on the number of failures....
How to face the water investment boom, a response through solidarity (1995)
The new rules in water management have as principal object in view, the improving of water quality. Potability norms and evacuation levels have therefore become harder. Thus many investments have to...
Alimentation en eau potable : optimisation des échéances de renouvellement (1994)
Alexandre, O., Werey, C., Elnaboulsi, J.
Water mains renewal often occures with net reorganizing, but in the next years, real renewal works will have to be undertaken because of the ageing and the damages in the networks. New tools will be...