The Nile Treaties prevent upstream countries from using the waters of the Nile without the consent of those downstream. This results in an Egyptian bias.
Instead of allocating the Nile waters based on a fixed, perpetual water supply Ethiopia, Sudan, and Egypt must consider changes in weather patterns, among other factors.
It's important for the Nile nations to make Ethiopia's planned dam work for all.
Many countries in eastern and southern Africa rely on hydropower for electricity generation and there are plans for several more dams.
The leaders of Ethiopia, Egypt and Sudan have shown some commitment to sharing the waters of the Nile. But hard negotiations on the Grand Ethiopian Renaissance Dam are only beginning.