Polycentric Governance and Optimizing the Water-Energy-Food Nexus for Environmental Sustainability in the Semi-Arid Region of Nigeria: A Household and Institutional Assessment of Katsina State, Nigeria

The Water-Energy-Food (WEF) Nexus has emerged as a central analytical and policy framework for managing interdependent resource systems in water-scarce environments. This study examines the optimization of the WEF Nexus for environmental sustainability in the semi-arid Sudano-Sahelian belt of Katsina State, Northern Nigeria, where climate variability, rapid population growth, land degradation, and weak cross-sectoral coordination intensify pressure on water, energy, and food systems. Adopting a mixed-methods, cross-sectional design, the study combines a structured household questionnaire administered to 384 respondents, determined using Cochran’s sample size formula, with key informant interviews (KIIs) involving officials of relevant Ministries, Departments and Agencies (MDAs), local government functionaries, and community/traditional leaders across six purposively selected Local Government Areas (LGAs). A four-layer conceptual framework integrating Hoff’s WEF Nexus model, Ostrom’s Institutional Analysis and Development (IAD) framework, and polycentric governance theory guides the analysis of contextual drivers, nexus interactions, institutional arrangements, and optimization strategies. Quantitative data are analysed descriptively and inferentially using SPSS (including correlation and regression), while qualitative data undergo thematic analysis in NVivo, with findings triangulated across both strands. The study is expected to reveal significant trade-offs and synergies among the three sectors, fragmented institutional coordination among MDAs, low uptake of integrated resource-efficient technologies, and a strong association between polycentric governance capacity and nexus optimization outcomes. The paper concludes with a set of governance-oriented recommendations and contributes a replicable, context-specific analytical framework applicable to other semi-arid regions of the Sudano-Sahelian zone and comparable dryland settings in sub-Saharan Africa.

Keywords: Water-Energy-Food Nexus; environmental sustainability; semi-arid Nigeria; polycentric governance; institutional coordination; Sudano-Sahelian region.