Downstream Health and Hydrological Development: A Policy Analysis of Niger River Basin Dams, 2021–2026

This policy analysis examines the health implications of large dams for downstream communities in the Niger River Basin. It addresses a critical gap in integrating health considerations within water resource development policy frameworks in West Africa. Employing a desk-based methodology, the study conducts a systematic review of national and regional policy documents alongside a synthesis of epidemiological and environmental data from 2021-2026. The analysis reveals that while dams support energy and agricultural objectives, they concurrently exacerbate significant public health challenges. Key findings document an increased prevalence of waterborne diseases, notably schistosomiasis, associated with altered hydrological regimes and reservoir creation. Furthermore, disrupted floodplain ecology and agriculture have intensified nutritional insecurity, compounding community vulnerabilities. The study argues that prevailing policies prioritise hydrological and economic outcomes, inadequately mitigating these negative health externalities. Its significance lies in the urgent demonstration of the need for a revised, health-sensitive policy paradigm. The analysis concludes that for sustainable development, Niger Basin authorities must institutionalise mandatory health impact assessments and foster robust cross-sectoral collaboration between water, agricultural, and public health ministries. This integrated approach is essential to ensure infrastructure development does not undermine the wellbeing of vulnerable populations.