FOOD SECURITY AND CLIMATE CHANGE IN THE NILE BASIN: THE IMPLICATIONS OF TRANSBOUNDARY WATER USE EXTERNALITY
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Date
2026
Authors
Tewodros Negash Kahsay
Journal Title
Journal ISSN
Volume Title
Publisher
AERC
Abstract
The impact of climate change on food security in the Nile basin is evaluated using a multi-country, multi-sector computable general equilibrium model. The analysis employs the GTAP 10 database and the GTAP-W model that differentiates between rainfed and irrigated agriculture. The economy-wide impact of climate change in 2050 is evaluated for the B1 global emissions scenario from two global circulation models (CSIRO and MIROC). The study applies two scales of analysis – riparian and basin-scale analysis. The results reveal that climate change induces adverse effects on the state of food security in the basin through its impact on the ‘food availability’ and ‘access to food’ dimensions of food security. The results unequivocally disclose that the basin-scale analysis that underpins basin-wide cooperative and efficient management of the water and other resources of the Nile basin, with water use externalities internalized provides a significant opportunity to better absorb climate shocks compared to the riparian-scale analysis.