Community Perceptions and Social Acceptance of Hydropower Projects: A Review

Hydropower remains the world's largest renewable energy source and a cornerstone of low-carbon development and energy security. Yet, host communities' attitudes and acceptance are decisive to project success, often more so than technical efficiency or economic viability. This article presents a systematic review of the factors shaping community perceptions and social acceptance of hydropower projects, focusing on economic advantages, environmental effects, and sociocultural dynamics. Methodologically, this study adopts a structured narrative review design: peer-reviewed literature and institutional reports were identified through keyword searches of reputable sources. Sources were screened for relevance to community acceptance and organized thematically, and evidence was synthesized through a comparative, cross-case analysis of documented cases from Chile, China, India, Zambia, Cameroon, and Nigeria. The findings, drawn from these cases, show that: (i) economic incentives alone are insufficient to secure community acceptance, as demonstrated by the Chilan discrete choice experiment, which found that tariff discounts did not change community attitudes even in communities without prior dam experience; (ii) benefit-sharing and participation, institutionalised from the outset can produce measurable acceptance, as illustrated by Zambia's Ngonye Falls project which secured a Community Participation Agreement with traditional authorities, reduced physical relocation to 71 of 419 affected households, indexed compensation to inflation, and became Africa's first hydropower project to achieve Gold certification under the Hydropower Sustainability Standard; (iii) procedural exclusion generates durable conflict, as evidenced by Cameroon's Nachtigal dam, despite supplying 30% of national electricity, prompted ten affected communities to file complaints with the World Bank Inspection Panel and the African Development Bank’s Independent Review Mechanism over inadequate compensation of approximately US$4,460 per fisher, demolished sacred sites, and limited local subcontracting opportunities; (iv) sociocultural disruption from resettlement can outweigh material compensation as demonstrated by China's Ludila station, where 44% of productive land was lost and only about 16% replaced, while 90% of flooded irrigated land required substitution through the development of a new reservoir; and (v) demand-side evidence from Nigeria's Taraba State shows 96% of respondents ranked off-grid electricity as their top need and 94% expressed willingness to help maintain a community-based system, indicating that acceptance is latent where investment and political will are absent. The review concludes that acceptance is best treated as an integrated outcome of economic, environmental, and sociocultural variables rather than as three separate assessments. The practical implications are that developers and policymakers should mandate early, binding community participation agreements with grievance mechanisms; index compensation and guarantee ongoing livelihood restoration rather than one-off payments; embed environmental mitigation as a trust-building measure rather than a compliance box; and adopt the integrated Community Acceptance Index proposed here as a screening and monitoring tool for evidence-based decision-making by policymakers, developers, and host communities.