The main objective of this document is to describe activities related to Component 5 of the Cubango-Okavango River Basin Water Audit. This Water Audit is part of the project "Coping with water scarcity – the role of agriculture: Developing National Water Audits in Africa" (GCP/INT/072/ITA), and is carried out in co-operation with OKACOM (Permanent Okavango River Basin Water Commission). In particular, this document focuses on the update of a WEAP application for the basin, including review of an existing application, proposed updates, and discussion of results.