Application of GIS and CARE-W systemson water distribution networks inSkärholmen in Stockholm
Abstract: Urban infrastructure management is becoming more and more important for cities around theworld. This paper presents a management and rehabilitation strategy for water distributionnetworks, which is to ensure that they are economically under a healthy condition over anextended period of time. The idea is to pay more attention on pro- active approaches thatuse predictive analysis to achieve long- term economic efficiency.One target in this project is to integrate Geographic Information System technology andComputer Aided Rehabilitation of Water Networks (CARE-W), a new developed toolkit inEurope. This thesis also aims to study and evaluate water distribution condition by using datafrom Stockholm Water Company in Sweden. Moreover the reliability of CARE-W toolkit istested. It concluded the experience including theory review, data preparation, and integrateprocess and achievement presentation.The test area is called Skärholmen pressure zone, consisting 4060 water mains and about1580 failures, which were recorded from year 1988 to 2005. In the experiment, datapreparation and analysis processes occupied above 80% of the project time. Three CARE-Wtools have been tested. They are Performance Indicator tool, Reliability Model and FailureModel. The Performance Indicator Tool and Reliability Model were run successfully, but theFailure Model failed in this project. However another approach from only GIS analysis hasbeen carried to achieve failure forecasting.In the final part, why some portions are in poorer positions compared to others are discussedbased on reality and results from the experience. Results are presented in graphs, GIS mapsand tables. These are mainly for decision makers to know the current situation of their assetand where they should put more energy on and how to make long term planning.
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