Report detailing the findings of the Baseline Study in the Baro-Akobo-Sobat (BAS) sub-basin, as part of the BAS Multi-Purpose Water Resource Development Study. It identifies baseline information (biophysical, biological, and socio-economic environment, water resources and water balance model), the potential to develop multipurpose projects, key issues, challenges, causes and impacts as well as a vision and strategic options in the context of the development of the sub-basin.