My best answer is if their food supply was their they stayed around and created the jobs of farmers, bakers, etc. that formed a society.
To irrigate there farms
Mesopotamia is the land between the Tigris and Euphrates Rivers. Sumerians learned to control the Tigris and Euphrates Rivers by constructing levees and irrigation canals.
They created levees to hold back river floods, and built channels to irrigate the fields when river levels were low. They may have employed water scoops to fill elevated ditches.
The primary contributor was the NILE RIVER which provided sufficient water and minerals to irrigate crops and feed a large population.
it was easy to irrigate it but the farmers had to control the flooding by digging canals
The Egyptians depended on the annual flooding of the Nile to cover their fields with black silt and to irrigate their crops.
The Maya built a system of canals, reservoirs, and raised fields to control flooding and properly irrigate their crops in extremely wet regions. They used terracing to create flat areas for cultivation and managed water flow using gravity, ditches, and dams. This careful water management allowed them to grow a variety of crops and sustain their population.
the prefix for irrigate is
In a dry area they provided the water to irrigate, and so provided the food surplus on which a civilisation can evolve.
I had to irrigate the fields today.
The verb of irrigation is irrigate. As in "to irrigate something".
The way flooding and rich soil contribute to the fertility of the land was that Mesopotamia citizens received a little bit of rain. That's when irrigation started. To irrigate their lands, they dug out canals, human-made water ways. This is what gave rise to farming.
Ancient Egyptians needed the floods to irrigate crops. Egyptians would measure the water with a nilometer so people upstream would be aware of how much water was coming.
Irrigate is already a verb because it is an action.Other verbs are irrigates, irrigating and irrigated, depending on tense.For example, here are some sentences:"We will irrigate the crops today"."They irrigate the fields"."We need to do some irrigating"."They irrigated the farmland"
The Japanese learned to irrigate from the Dutch people of the Dutch enclave of Dejima. Japan learned how to irrigate during 1641.