The ancient Mesopotamians maintained the uncontrolled water supply of the Tigris and Euphrates rivers by creating irrigation systems, levees, and canals.
As stated in the text titled History Alive!: The Ancient World. Palo Alto, CA: Teachers' Curriculum Institute, 2011. Print. , “One of the biggest problems was the uncontrolled water supply of the Tigris and Euphrates rivers. During the spring, rain and melted snow from the mountains flowed down the rivers causing them to flood the land. The farmers never knew exactly when the rivers would flood and sometimes their crops would wash away.”.
The text also stated “...Sumerians