I dont know why they get 80% but maybe cause they are the end user or something,if someone could explain?
The thing about this Dam is supposed to be built for electricity generation , Egypt did not object on building the dam but rather on how much water the dam will hold behind .
The Dam effects on Egypt and Sudan will take time to come , at least 10 years , so Egyptians have time to negotiate and at the same time prepare for an air-strike on that dam .
Sudan has given Egypt an air-base only 40 km away from where that dam is located and Egyptian commandos trained there several times before .
This will not be a war, Just one air-strike if negotiations fail at the end and Ethiopia does not share borders with Egypt to retaliate anyway , the country military performance is a Joke , lately they had a war with a country called Eritrea with only a population of 5.4 million , and during a 9 month combact they lost over 5000 soldiers.
eritrea is even militarly weaker than ethiopia.
Actually this event is a big chance for Egypt to form a confederation with Sudan , Sudan is a country half the size of Europe and rich in soil and agricultural land , if this works out it will certainly change a lot of things for Egypt.