sentences:  Considering the basin area of the Nile, Sudan has the largest size (1.9 million km²) whereas, of the four major tributaries to the Nile, three originate from Ethiopia – the Blue Nile, Sobat and Atbara.The modern history of hydropolitics in the Nile basin is very complex and has had wide ramifications both for regional and global developments.The following table sort of demonstrates  the water availability in each country within the Nile basin, and researchers' estimates of decrease in water availability to these countries, due largely to an increase in the countries' populations.