[forty two] From prehistoric instances, Egyptians probably employed the power of the yearly flooding of your Nile to irrigate their lands, gradually Finding out to control Considerably of it by purposely constructed irrigation channels and "catch" basins.[forty three] The ancient Sumerians in Mesopotamia used a posh program of canals and https://teknologi-kedokteran-its45981.iamthewiki.com/9052658/everything_about_teknologi_pembuatan