About 7000 years
Complex irrigation networks have watered the valley and supported farming for 7,000 years.
Mesopotamia was in the Tigris Euphrates river valley because ancient civilizations needed water. The Tigris and Euphrates rivers provided that necessity to the people in that area.
indus river valley, tigris river valley
Danube River Valley
Tigris, Euphrates River Valley's and Los Angeles
tigris and euphrates river valley
The Tigris-Euphrates Valley, the Indus Valley, and the Yangtze Valley.
Mesopotamia
Both civilizations were very structured. However, the Tigris and Euphrates were much less predictable than the Nile was and flooding was not as able to be as planned for in the Tigris-Euphrates Valley as it was in the Nile River.
Tigris valley
Tigris-Euphrates
What was known as the Tigris Valley corresponds to what is modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran.