With a dam the Egyptians didn't need to worry about the effects of a drought. Of course, that'll solve every body's problems. I mean, not only will it throw off the farmers seasons, it'll also make it so that they have to work all year long. If they do that, then who's gonna build the pyramids for the pharaohs? Come on people, plan ahead!! Also, with the regulation of water output, crops could be grown year round. Again, it throws off schedules and who's still gonna be building those pyramids? Hydroelectric power provides much needed energy for the growing country. Ohhh, fancy words, why doesn't everybody go out and get themselves some hydroelectricity. Also navigation is improved. Whoopdeddoo! Why do they need better navigation, they already know how to navigate on the Nile, why mess them up with a dam? Again, plan ahead people!!!! Gosh.