It didn't they came and stole all our jobs.
irrigation
after he introduced irrigation to the Yellow River valley.
The first river valley civilization was Mesopotamia, located in Asia. Asia has had the most river valley civilizations.
Irrigation.
Danube River Valley
Irrigation.
Tigris, Euphrates River Valley's and Los Angeles
Complex irrigation systems.
yellow river valley
This is called irrigation - specifically it is "surface irrigation".
Democracy
Egypt and the Indus Valley region (modern-day Pakistan) were also suitable sites for new civilizations like Mesopotamia. Both regions offered arable land and sources for irrigation, such as the Nile River in Egypt and the Indus River in the Indus Valley. The fertile soil and reliable water sources allowed these civilizations to flourish and develop advanced agricultural systems.