It's practically a project of the Egyptian military who will mostly own the land. They will grow cash crops for export to gain a source of income. This will also drain the ancient and non-renewable Nubian Sandstone Aquifer. This is water that has been trapped for thousands of years. It is the world's largest fossil water system and is of immense scientific value. Not to mention the historic Nile Delta wetlands that w…
Here’s the source of the problem https://en.wikipedia.org/wiki/Grand_Ethiopian_Renaissance_Da...
The problems are that the Nile is a modest River and that Egypt has a population problem in a resources-strapped region, coupled with extremely unsustainable government policies (a topic in itself is an amalgum of compounding issues).