The 2 main rivers are known as the Tigris river, and the Euphrates river.
Mesopotamia is located in asia and the modern day contry Irac.
A problem arose as the population grew, we didn't have enough space.
we moved to Sumer to have more land for the bigger population.
Once again another problem arose, we couldn't control the water supply. we found 2 solutions to help us fix the problems, one of them being levees and the other being canals to help the water flow.
The irrigation canals always needed to be cleaned, we got people to help this problem by cleaning all of the slit out and making sure the water ballences were level.
The villages became dependent on one another to keep it clean, so they knew they coulden't cause trouble.
Back in my times the cities mainly fought over the water supply because the people up stream were keeping all the water to themselves.
All these advancements helped Sumer to rise into a better region. Through all of the tough times they made it through it and created a solution to solve all the problems.