Abstract
Sewer networks represent high value in water infrastructure assets and it is important to develop and operate them by specified sustainable management. This paper presents the results of a sustainability analysis on the wastewater transport system of Trondheim, Norway, for future planning (2014–2040) from a metabolism-based performance analysis by the Dynamic Metabolism Model (DMM). The aim of this work is to demonstrate a methodology for comparing different pathways toward a sustainable management of wastewater systems. For this purpose, four intervention strategies ‘infiltration and inflow reduction’, ‘increasing rehabilitation rate’, ‘extension of system regarding population growth’, ‘energy management’ along with different combinations of them have been analysed. The results of this study may give some support to decision-makers in wastewater departments. In practice, to achieve strategic level planning of sustainable sewer asset management, it is vital to assess different aspects of sustainability and manage them in a comprehensive system.
Highlights
Urban water systems (UWS) are related to different aspects of sustainability such as social, economic, and environmental dimensions, which are ‘triple bottom line’ of the sustainability concept
The aim of this work is to demonstrate a methodology for comparing different pathways toward sustainable management of wastewater transport systems, which represent a high value in water infrastructure assets
The wastewater transport system of the city of Trondheim is analysed from a sustainability point of view by the dynamic metabolism model (DMM)
Summary
Urban water systems (UWS) are related to different aspects of sustainability such as social, economic, and environmental dimensions, which are ‘triple bottom line’ of the sustainability concept. The sustainable management of the water infrastructure should be considered in strategic long-term planning of UWS, which leads to economic and environmental achievements for society. These infrastructures present a high asset value and future generations will inherit the consequences of today’s investments decisions (Marlow et al, 2013). This important issue in general has not been considered seriously until now and there are only few studies which have been carried out on social and environmental aspects of sustainability on UWS (Ludzia, Larsson and Aguayo, 2014)
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