How did Sumerians use the rivers to help them?

The Sumerians utilized the Tigris and Euphrates rivers primarily for agriculture, leveraging the fertile alluvial soil deposited during seasonal floods to cultivate crops like barley and wheat. They developed sophisticated irrigation systems, including canals and dikes, to control water flow and ensure a reliable water supply for their fields. Additionally, the rivers facilitated trade and transportation, allowing Sumerians to exchange goods with neighboring regions and enhance their economy. Overall, the rivers were essential to the sustainability and growth of Sumerian civilization.