integrated evaluation of hybrid water supply systems using a promethee–gaia approach

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ID: 204608
2018
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Abstract
There are pressures on existing centralized water infrastructures in urban centers which justify the search for alternatives. An increasingly important alternative is to shift from centralized to hybrid systems, often in response to climate variability and demographic changes. In a hybrid system, water is supplied and discharged through a mix of centralized and decentralized systems. There is usually no single objective that justifies the choice of hybrid water systems, but they typically are justified based on the consideration of a number of different criteria in order to evaluate the overall quality of service provision. The most important criteria include meeting water demand, as well as reducing demand for fresh water and instead using local alternative water supplies. Integration of multiple objectives to evaluate the hybrid water supply systems can be accomplished by multi-criteria decision aid techniques. This paper evaluates a number of hybrid water supply scenarios using a case study based on the Northern Growth Area of Melbourne, Australia. It uses the Preference Ranking Organization METHod for Enrichment Evaluations (PROMETHEE) and Geometrical Analysis for Interactive Decision Aid (GAIA), one of the multi-criteria decision-making methods through D-Sight software, to rank the hybrid water supply scenarios, and this ranking is validated by means of sensitivity analysis. The centralized system combined with stormwater harvesting and the centralized system combined with treated wastewater and rainwater tanks yielded the first and second most preferred scenarios, while the centralized water supply system combined with treated wastewater yielded the worst hybrid water supply option.
Existem pressões sobre as infraestruturas hídricas centralizadas existentes nos centros urbanos que justificam a busca por alternativas. Uma alternativa cada vez mais importante consiste na transição de sistemas centralizados para sistemas híbridos, frequentemente em resposta à variabilidade climática e às mudanças demográficas. Em um sistema híbrido, a água é fornecida e descarregada por meio de uma combinação de sistemas centralizados e descentralizados. Geralmente, não há um único objetivo que justifique a escolha de sistemas híbridos de água, mas eles costumam ser fundamentados na consideração de diversos critérios com a finalidade de avaliar a qualidade global da prestação do serviço. Os critérios mais importantes incluem o atendimento à demanda por água, bem como a redução do consumo de água doce mediante o uso de fontes alternativas locais de abastecimento de água. A integração de múltiplos objetivos para avaliar os sistemas híbridos de abastecimento de água pode ser realizada por meio de técnicas de apoio à decisão multicritério. Este artigo avalia diversos cenários de abastecimento híbrido de água a partir de um estudo de caso baseado na Northern Growth Area de Melbourne, Austrália. Utilizam-se o Preference Ranking Organization METHod for Enrichment Evaluations (PROMETHEE) e a Geometrical Analysis for Interactive Decision Aid (GAIA), métodos de tomada de decisão multicritério aplicados por meio do software D-Sight, para ordenar os cenários de abastecimento híbrido de água, sendo essa ordenação validada por meio de análise de sensibilidade. O sistema centralizado combinado com o aproveitamento de águas pluviais e o sistema centralizado combinado com águas residuais tratadas e reservatórios de água da chuva resultaram no primeiro e no segundo cenários mais preferíveis, respectivamente, enquanto o sistema centralizado de abastecimento de água combinado com águas residuais tratadas configurou a pior opção de abastecimento híbrido de água.
Reference Key
sapkota2018waterintegrated Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Mukta Sapkota;Meenakshi Arora;Hector Malano;Ashok Sharma;Magnus Moglia
Journal Journal of food biochemistry
Year 2018
DOI
10.3390/w10050610
URL
http://www.mdpi.com/2073-4441/10/5/610
Keywords
multi-criteria decision analysis promethee

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