It is a fact that water distribution systems in most European cities are reaching the end of their lifetime; pipe breaks and leaks have significant increased in the last few years, and there is no evident reason for the future trend to be inverted in the short-term horizon. The history of water networks rehabilitation leans on the so called reactive approach: first the failure occurs, then comes the intervention. Efforts are recently being undertaken in order to establish a rational framework for maintenance decisionmaking in water distribution systems, based on a new logic: a rehabilitation carried out before the problem takes place is to be preferred, thanks to its higher effectiveness and to the troubles it is able to prevent rather than cure (pro-active approach). Nevertheless, the experience demonstrated that availability of data is sometimes the first problem to be addressed and the application of advanced management approaches is sometimes unfeasible because of the lack of a long term monitoring strategy. Information about the asset and the surrounding environment are often available at the municipality archive, but not recorded in a way to be directly applied for maintenance actions planning. The aim of this study was to develop a simple but feasible model to assess the vulnerability of an Italian water distribution systems suitable with the level of data available: starting from a typical Italian case study, we defined what can be evaluated, analysed or calculated according to what can be obtained from the Utility in terms of data quality and quantity. The selected case study is the drinking water system of Reggio Emilia, located in the northern part of Italy, managed by ENIA SpA. Tonino Liserra, Rita Ugarelli, Vittorio Di Federico and Marco Maglionico in this paper, after an introduction on asset managements practice, state the definition of reliability variable and criticality index applied in order to run a simplify vulnerability model and presents the results achieved in Reggio Emilia up to this stage of development.

A GIS based approach to assess the vulnerability of water distribution systems

LISERRA, TONINO;UGARELLI, RITA MARIA;DI FEDERICO, VITTORIO;MAGLIONICO, MARCO
2008

Abstract

It is a fact that water distribution systems in most European cities are reaching the end of their lifetime; pipe breaks and leaks have significant increased in the last few years, and there is no evident reason for the future trend to be inverted in the short-term horizon. The history of water networks rehabilitation leans on the so called reactive approach: first the failure occurs, then comes the intervention. Efforts are recently being undertaken in order to establish a rational framework for maintenance decisionmaking in water distribution systems, based on a new logic: a rehabilitation carried out before the problem takes place is to be preferred, thanks to its higher effectiveness and to the troubles it is able to prevent rather than cure (pro-active approach). Nevertheless, the experience demonstrated that availability of data is sometimes the first problem to be addressed and the application of advanced management approaches is sometimes unfeasible because of the lack of a long term monitoring strategy. Information about the asset and the surrounding environment are often available at the municipality archive, but not recorded in a way to be directly applied for maintenance actions planning. The aim of this study was to develop a simple but feasible model to assess the vulnerability of an Italian water distribution systems suitable with the level of data available: starting from a typical Italian case study, we defined what can be evaluated, analysed or calculated according to what can be obtained from the Utility in terms of data quality and quantity. The selected case study is the drinking water system of Reggio Emilia, located in the northern part of Italy, managed by ENIA SpA. Tonino Liserra, Rita Ugarelli, Vittorio Di Federico and Marco Maglionico in this paper, after an introduction on asset managements practice, state the definition of reliability variable and criticality index applied in order to run a simplify vulnerability model and presents the results achieved in Reggio Emilia up to this stage of development.
T. Liserra; R. Ugarelli; V. Di Federico; M. Maglionico
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/65132
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