The river known for the annual flooding that enriches its banks is the Nile River. Flowing through northeastern Africa, it is historically regarded as the lifeblood of Egypt and Sudan, where its seasonal inundation deposits nutrient-rich silt along its banks. This phenomenon occurs primarily due to the rainy seasons in East Africa, which contribute to the river's flow. The annual floods played a crucial role in ancient Egyptian agriculture, allowing for the cultivation of crops and sustaining the population along its banks.