The river considered the lifeblood of the Nile Delta is the Nile River. Flowing through several countries, including Uganda, Sudan, and Egypt, it is one of the longest rivers in the world. The Nile Delta is formed where the river meets the Mediterranean Sea, creating a fertile region essential for agriculture and supporting a large population. The river has been vital to the civilizations of ancient and modern Egypt, providing water, food, and a means of transportation throughout history.