Rita Maria Ugarelli

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As Oslo Vann og Avløpsetaten (VAV, meaning Water and Sewage Department) looks into the future, it is faced with a quandary-to replace old pipelines or to continue maintaining them. The primary goal is to improve the level of service. The secondary goals are to rejuvenate the system and stem the decline in capital value. In 1991-2006, the Operation and(More)
As urban sewer infrastructures age, it becomes increasingly important to make effective decisions to maintain the structural condition of the sewers at an acceptable level. To support the decision-making process, the utility manager can apply sewer deterioration models. However, the quality of the decision support from such models is dependent on the(More)
A decision support system (DSS) tool for the assessment of intervention strategies in an urban water system (UWS) with an integral simulation model called "WaterMet" is presented. Lists of intervention options and Performance Indicators (PI) are exposed by the DSS for the user to define intervention strategies and metrics for their comparison. The(More)
Oslo Vann og Avløpsetaten (Oslo VAV)-the water/wastewater utility in the Norwegian capital city of Oslo-is assessing future strategies for selection of most reliable materials for wastewater networks, taking into account not only material technical performance but also material performance, regarding operational condition of the system.The research project(More)
Infiltration and inflow (I/I) of non­sewer water into the urban sewer system is a critical problem in the long­term for sustainable urban water management and water infrastructural asset management, which has serious environmental, social and economic impacts on cities and sewer systems. I/I of unwanted storm­water, groundwa­ ter and other extraneous(More)
Sewer and wastewater systems suffer from insufficient capacity, construction flaws and pipe deterioration. Consequences are structural failures, local floods, surface erosion and pollution of receiving waters bodies. European cities spend in the order of five billion Euro per year for wastewater network rehabilitation. This amount is estimated to increase(More)
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