Using many-objective trade-off analysis to help dams promote economic development, protect the poor and enhance ecological health

•Many-objective optimisation is linked to a water resources management simulator.•Ten performance metrics are optimised representing diverse stakeholder benefits.•Trade-offs are revealed between economic, social and ecological benefits.•Impacts of selected Pareto-optimal reservoir release policies a...

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Vydáno v:	Environmental science & policy Ročník 38; s. 72 - 86
Hlavní autoři:	Hurford, Anthony P., Huskova, Ivana, Harou, Julien J.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Amsterdam Elsevier Ltd 01.04.2014 Elsevier
Témata:	algorithms Animal, plant and microbial ecology Applied ecology basins Biological and medical sciences Brazil case studies Conservation, protection and management of environment and wildlife economic development environmental health farmers Fundamental and applied biological sciences. Psychology irrigation issues and policy Jaguaribe basin in north-east Brazil livelihood Livelihood benefits Multi-criteria optimisation Multi-reservoir system management politics Visualising trade-offs water allocation water power Water resource security water supply South America Brazil America Multi-criteria optimisation Water resource security Visualising trade-offs Multi-reservoir system management Livelihood benefits Jaguaribe basin in north-east Brazil Multicriteria analysis Environmental policy Livelihood Reservoir Economic development Optimization Dam Environment impact Profit Water resources Environment quality
ISSN:	1462-9011, 1873-6416
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Popis
Shrnutí:	•Many-objective optimisation is linked to a water resources management simulator.•Ten performance metrics are optimised representing diverse stakeholder benefits.•Trade-offs are revealed between economic, social and ecological benefits.•Impacts of selected Pareto-optimal reservoir release policies are contrasted.•Visual analytic plots help balance livelihood vs. traditional reservoir benefits. Allocating water to different uses implies trading off the benefits perceived by different sectors. This paper demonstrates how visualising the trade-offs implied by the best performing water management options helps balance water use benefits and find sustainable solutions. The approach consists of linking a water resources model that can simulate many management policies and track diverse measures of system performance, to a many-objective evolutionary optimisation algorithm. This generates the set of Pareto-optimal management alternatives for several simultaneous objectives. The relative performance of these efficient management alternatives is then visualised as trade-off curves or surfaces using visual analytic plots. Visually assessing trade-offs between benefits helps select policies that achieve a decision-maker-selected balance between different metrics of system performance. We apply this approach to a multi-reservoir water resource system in Brazil's semi-arid Jaguaribe basin where current water allocation procedures favour sectors with greater political power and technical knowledge. The case study identifies promising reservoir operating policies by exploring trade-offs between economic, ecological and livelihood benefits as well as traditional hydropower generation, irrigation and water supply. Results show optimised policies can increase allocations to downstream uses while increasing median land availability for the poorest farmers by 25%.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1462-9011 1873-6416
DOI:	10.1016/j.envsci.2013.10.003