Volume 4 (Annex 4: Climatic Analysis and River Flows) of the Project Preparation Report of November 2007, used to prepare the Project Implementation Plan for a fast track Integrated Watershed Management Project (IWMP) for Gimera, Ribb and Gema catchments of Ethiopia, in December 2007. The IWMP is an integral part of the Tana Beles Integrated Water Resources Development Program in Ethiopia, supported by the World Bank. The four volumes are: Volume 1 (Annex 1: Stakeholder Assessment); Volume 2 (Annex 2: Institutional Assessment); Volume 3 (Annex 3: Land and Water Assessment); and Volume 4 (Annex 4: Climatic Analysis and River Flows).