Why did farmers need to develop a system to control the water supply

Farmers needed to control the water supply because too much water or too little water would kill the crops (too much would flood the fields and too little would lead to a drought)

Hope this helps

Why did farmers need to develop a system to control the water supply. Farmers developed a system to control the water supply because they can't just waste their water. Water is a very valuable resource that needs to be conserved.
Probably won't help, but i hope you got an idea… <3