ABSTRACT
In a transboundary river basin where there is an existing all-inclusive water management/allocation agreement, impacts assessment to a new project/dam can be determined in an orderly manner using existing scientific modelling methods. In such a situation, the limiting factor could be the availability and quality of data to be used in the modelling, and capacity of models to reproduce the reality may come into the picture. A serious challenge, however, occurs where there is no all-inclusive water management/allocation agreement as in the case of the utilization of the Nile river. This paper describes efforts by Ethiopia, Egypt, and Sudan to reach a win-win solution in the utilization of the Eastern Nile river system in light of the undergoing construction of Grand Ethiopia Renaissance Dam (GERD) on the Blue Nile river, and proposes the use of a stated preference water resources modeling approach for Eastern Nile Water Resources Management in case of conflicting interests using RiverWare.

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