The issue is: there are treaties that split water rights between countries, but flooding beyond 100% of capacity at any given point isn't counted. Egypt has be

The issue is: there are treaties that split water rights between countries, but flooding beyond 100% of capacity at any given point isn't counted. Egypt has been taking advantage of this, allowing the "overflow" from their dam/lake nassar to be syphoned off into the desert, to the extent of trying to develop an entirely new drainage valley into farmland. It is a mega project. Any upriver country that is able to divert the "overflow" water before it gets too Egypt can keep it. So it's basically an argument over who gets to keep the surplus in the water balance of the river. >[1]Use of Nile resources is governed by the Nile Basin Initiative; but the Toshka project does not breach the agreement as water is diverted from Lake Nasser only after heavy water flows upstream have raised lake levels above 178 metres (584 ft) (see above). [1]https://en.wikipedia.org/wiki/Nile_Basin_Initiative https://en.wikipedia.org/wiki/Nile_Basin_Initiative [2]https://en.wikipedia.org/wiki/New_Valley_Project https://en.wikipedia.org/wiki/New_Valley_Project [3]https://en.wikipedia.org/wiki/Toshka_Lakes https://en.wikipedia.org/wiki/Toshka_Lakes