A model to integrate and assess water-energy-food nexus performance: South Africa case study

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dc.creatorNhamo, Luxon
dc.creatorMabhaudhi, Tafadzwanashe
dc.creatorMpandeli, S.
dc.date2019-09-01
dc.date2020-01-27T09:29:18Z
dc.date2020-01-27T09:29:18Z
dc.date.accessioned2026-06-27T18:31:35Z
dc.descriptionThe main limiting factor impeding the operationalisation of the WEF nexus has been lack of metrics and tools to translate the concept into a fully-fledged operational framework to support policy and decision-making. This study developed a WEF nexus model by (i) defining WEF nexus sustainability indicators, and (ii) calculating composite indices for those indicators to establish numerical relationships among WEF nexus resources using South Africa as a case study. The composite indices show WEF nexus performance as well as monitoring and evaluation of WEF resources management. The indicators were integrated through the Analytic Hierarchy Process (AHP) in a multicriteria decision-making (MCDM). The established quantitative relationships indicate resource utilisation, management and performance through a spider graph to illustrate WEF nexus performance, providing a general overview of the level of interactions, interrelationships and inter-connectedness of resources. The shape of the spider graph is determined by the level of the interdependencies and interactions among the WEF nexus sectors, whose management is viewed either as sustainable or unsustainable depending on the classification of the developed integrated index. The spider graph for South Africa showed an over-emphasis on food self-sufficiency and water productivity at the expense of other sectors. The deformed shape of the spider graph is a demonstration of the sectoral or “silo” approach in resource management. The calculated integrated WEF nexus index of 0.203 for South Africa classified the country under the low sustainability category. The developed model is a decision support tool that provides evidence for interventions in priority areas. The model demonstrates the capabilities of the WEF nexus to evaluate synergies and trade-offs in a systematic and integrated way to increases efficiency and productivity in resource management for sustainable development.
dc.identifierhttps://hdl.handle.net/10568/106718
dc.identifier.urihttp://hdl.handle.net/123456789/158459
dc.languageen
dc.rightsLimited Access
dc.sourceNhamo, Luxon; Mabhaudhi, T.; Mpandeli, S. 2019. A model to integrate and assess water-energy-food nexus performance: South Africa case study. Paper presented at the 3rd World Irrigation Forum (WIF3) on Development for Water, Food and Nutrition Security in a Competitive Environment, Bali, Indonesia, 1-7 September 2019. 10p.
dc.subjectwater resources
dc.subjectenergy resources
dc.subjectfood security
dc.subjectnexus
dc.subjectmodels
dc.subjectwater availability
dc.subjectwater productivity
dc.subjectagricultural productivity
dc.subjectclimate change adaptation
dc.subjectresilience
dc.subjectliving standards
dc.subjectsustainability
dc.subjectindicators
dc.subjectcase studies
dc.titleA model to integrate and assess water-energy-food nexus performance: South Africa case study
dc.typeConference Paper

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Instituto Internacional para el Manejo del Agua (IWMI)