Research School for Socio-Economic and
Natural Sciences of the Environment
Research School for Socio-Economic and
Natural Sciences of the Environment

Reem Fikri Mohamed Osman Digna

Date: 26 May 2020
Time: 15:00 - 16:45
Location: Online

Due to the covid-19 pandemic the defence will be organised fully digitally and will not be open to the public. A video will be made available online after the defence.

Dissertation title: 

On optimizing operation of multiple reservoirs system in the Eastern Nile Basin considering water and sediment fluxes

Integrated Water Systems and Governance, IHE Delft
Promotors: Professor Stefan Uhlenbrook & Professor Pieter van der Zaag
Co-promotor: Dr. Yasir A. Mohamed


The Eastern Nile riparian countries Egypt, Ethiopia and Sudan are currently developing several reservoir projects to contribute to the needs for energy and food production in the region. The Nile Basin, particularly the Eastern Nile Sub-basin, is considered one of a few international river systems with potential conflicts between riparian countries. In the absence of formal mechanisms for collaboration, the transboundary nature of this basin makes sound water resources development challenging. The large seasonal and inter-annual variability of the river flow exacerbates those challenges. A further complication is the high sediment load in the Eastern Nile rivers during the high flow season.
This study contributes to fill relevant knowledge gaps through a better understanding of the methods needed for a complex system of multipurpose reservoirs, considering both water quantity and sediment load. The study quantifies the impacts of water resources development in the Eastern Nile basin and identifies system management options at both regional and country level. Developing a collaborative and unified perspective of the countries towards new projects can be beneficial for all. New operation rules are proposed for improving operation of the current system when new infrastructures are developed and operated either unilaterally or, ideally, cooperatively.