In 2016, Independent Development Evaluation at the African Development Bank embarked on a rigorous evaluation of the Bank’s assistance to the water sector in Africa. It targeted Bank interventions in Water Supply and Sanitation (WSS), in both rural and urban contexts, and Agricultural Water Management (AWM) from 2005 to 2016, focusing on the assistance the Bank provided in the form of infrastructure, knowledge and analytical work. The evaluation was in response to a request by the Bank’s Board of Directors for information on the results of the Bank’s support for WSS (UA 3.7 billion) and AWM (UA 2.2 billion) during the evaluation period. It aimed to inform the Bank’s strategies and operational approach to water sector assistance by taking stock of the results of the Bank’s assistance and drawing lessons for future work.
A reconstructed Theory of Change approach was used, combined with the standard evaluation criteria (relevance, effectiveness, efficiency and sustainability). The evaluation obtained data from multiple sources of evidence including: (i) a document, policy and literature review; (ii) a review of the Bank’s water portfolio; (iii) 41 Project Evaluation Reports comprising 16 rural WSS, 15 urban WSS and 9 AWM projects, and a Water Sector Adjustment program across 23 countries; and (iv) 10 country case studies. Additional data was drawn from interviews with about 200 individuals as well as stakeholder meetings conducted during project site visits. A software for analysis of qualitative data and matrix tables were used in synthesizing the evidence.
The Bank’s water sector interventions were found to be relevant, and they delivered substantial outputs, although output levels remained below expectations. Achievement of outcomes was found to be moderate (particularly in the area of sanitation), leading to overall effectiveness being rated as unsatisfactory. Efficiency was likewise found unsatisfactory, and the results achieved are unlikely to be sustained. Based on the results achieved, how the Bank managed performance and the factors that influence that performance, the following recommendations were made to the Bank:
The sector evaluation is supported by three project cluster evaluations, of Rural Water Supply and Sanitation, Urban Water Supply and Sanitation, and Agricultural Water Management.