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Sustainability Assessment of Asset Management Decisions for Wastewater Infrastructure Systems—Development of a System Dynamic Model

1
Center for Advancement of Trenchless Technology (CATT), University of Waterloo, 200 University Avenue, Waterloo, ON N2L 3G1, Canada
2
Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue, Waterloo, ON N2L 3G1, Canada
3
Department of Earth and Environmental Sciences, University of Waterloo, 200 University Avenue, Waterloo, ON N2L 3G1, Canada
*
Author to whom correspondence should be addressed.
Systems 2019, 7(2), 26; https://doi.org/10.3390/systems7020026
Received: 2 March 2019 / Revised: 26 April 2019 / Accepted: 9 May 2019 / Published: 13 May 2019
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Abstract

This paper presents the development of a novel system dynamics (SD) model for better understanding the interrelation and feedback mechanism between the wastewater collection (WWC) and wastewater treatment plant (WWTP) systems. Causal loop diagrams (CLDs) are developed and discussed to depict and understand feedback and inter-connections between physical, financial, and consumer sectors. The developed SD model is then extended to include the greenhouse gas (GHG) emissions, as a proxy for the environmental sector and for an environmental sustainability assessment of strategic decisions related to asset management planning of wastewater infrastructure system. It also adds new policy levers, such as population growth and urban densification in the social sector, and minimum fee-hike rates in the finance sector to enhance the representation of real-world conditions in the asset management planning. This new SD model will enable decision-makers to assess the sustainability impacts of their strategic decisions on wastewater systems, find synergistic cost-saving opportunities, and improve the sustainability performance of their asset management plans. View Full-Text
Keywords: system dynamics; sustainability assessment; wastewater collection pipe-network; asset management system dynamics; sustainability assessment; wastewater collection pipe-network; asset management
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Mohammadifardi, H.; Knight, M.A.; Unger, A.A. Sustainability Assessment of Asset Management Decisions for Wastewater Infrastructure Systems—Development of a System Dynamic Model. Systems 2019, 7, 26.

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