as you know, egypt was and is a dry country, nile river was very important to the egyptians. Egyptian civilization also known as "the nile valley civilization" could never have existed without the nile river. the nile river was pretty important to the egyptians , as it was the main source of water to them. the most fertile parts of soil in egypt were on the banks of the nile river. so it made them easier to cultivate crops and they could harvest enough for them to eat.
