WORLD CIVILIZATION

Detailed explanation-1: -This practice allowed them to control the rise and fall of the river to best suit their agricultural needs. A crisscross network of earthen walls was formed in a field of crops that the river would flood. When the floods came, the water would be trapped in the basins formed by the walls.

Detailed explanation-2: -To get the most out of the Nile’s waters, ancient Egyptian farmers developed a system called basin irrigation. They constructed networks of earthen banks to form basins, and dug channels to direct floodwater water into the basins, where it would sit for a month until the soil was saturated and ready for planting.