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UNESCO-IHE Institute for Water Education, Delft (2014)

Optimal operation of the Blue Nile System in Sudan before and after the Grand Ethiopian Renaissance Dam

Eltoum Hamad, S.O.

Titre : Optimal operation of the Blue Nile System in Sudan before and after the Grand Ethiopian Renaissance Dam

Auteur : Eltoum Hamad, S.O.

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2014

Résumé partiel
The Ethiopian Government began constructing a huge hydroelectric dam on the Blue Nile (Abbay) in 2011 and named it The Grand Ethiopian Renaissance Dam (GERD). This dam is expected to affect the downstream countries (Sudan and Egypt) which are mostly dependent on the Blue Nile, representingaround 68% of the River Nile flow. In this situation there is a clear need to assess these downstream impacts.Sudan Government has also finished the heightening of Roseires Dam by ten meters in 2012. This increased its live storage from around 2 km3to around 6 km3. The filling criteria and the way to maximize the benefit from the extra 4 km3of storage are yet to be finalized. Moreover, the dam’s operation needs to be revisited after GERD becomes operational.Against this background, a simulation and optimization model for a multi-purpose cascade of reservoirs hasbeen developed. The intention was to provide an optimal operation of the Blue Nile System in Sudan for both current situation (before GERD becomes operational) and the future situation (after GERD becomes operational) under three scenarios (dry, average and wet years). Two objectives were considered in the development of this optimal operation : maximizing hydropower generation and maximizing the new irrigation area that becomes potentially available after the heightening of Roseires.For the current situation, the model was also used to develop criteria for filling the heightened Roseires Dam and operate Roseires and Sennar Reservoirs to fulfil the irrigation demands for the existing and newly proposed irrigation projects and the hydropower generation of both dams. This situation was also analyzed for three scenarios (dry, average and wet years).The future situation included the operation of GERD. The water release that comes from the operation ofGERD will serve as the inflow to the Blue Nile System in Sudan, which was simulated and optimized to maximize the new irrigation area and the hydropower generation.

Sujets  : dams hydropower reservoir systems Blue Nile River Sudan Ethiopia

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