Abstract
The selection of stormwater Best Management Practices (BMPs) for mitigating the effects of urbanization on the hydrological cycle could be a complex process due to conflicting stakeholder views, and varying levels of performance of BMPs across a range of criteria (runoff reduction, erosion control, etc.). Part 1 of this article proposed a methodology based on the application of multi-criteria decision aid (MCDA) methods, which was tested here on a residential stormwater network in the Montreal area. The case study considered green roofs, rain gardens, rain barrels and pervious pavement over a range of economic, social, and water quality and quantity criteria by applying 4 MCDA methods under three different stakeholder views. The results indicated Elimination et Choix Traduisant la Réalité (ELECTRE) III to be the most appropriate method for the methodology, presenting flexibility concerning threshold values, criteria weights, and showing shared top choices across stakeholders (rain gardens, and rain gardens in combination with pervious pavement). The methodology shows potential for more formal applications and research opportunities. Future work may lie in the inclusion of multiple objective optimization, better stakeholder engagement, estimation of economic benefits, water quality modeling, long-term hydrological simulations, and estimating real BMP pollutant removal rates.
Highlights
This is Part 2 of the paper on the methodology for selecting Best Management Practices (BMPs) based on multi-criteria decision aid (MCDA) methods integrating multiple stakeholder views.To demonstrate the methodology’s potential, Part 2 presents a case study application following the steps described in detailed in Part 1 [1] along with the corresponding results and discussion
It can be seen that, according to the citizen’s point of view, all methods except MTOPSIS ranked the combination of rain gardens and pervious pavement in first place
From the engineers’ perspective, all methods pointed towards the solution of rain gardens
Summary
This is Part 2 of the paper on the methodology for selecting Best Management Practices (BMPs) based on multi-criteria decision aid (MCDA) methods integrating multiple stakeholder views. To demonstrate the methodology’s potential, Part 2 presents a case study application following the steps described in detailed in Part 1 [1] along with the corresponding results and discussion. Rather than focusing on the results, which could be highly case-specific, this work mainly draws attention to how the proposed methodology could be applied and interpreted
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