So the Sumerians invented the first revelation consists of flood protection bunds, canals and reservoirs. This method allows the crop to be successful.
Sumer thus invented the system of having the first consists of flood protection embankments. Water transfer Canal and reservoir This method allows the cultivation.
the inhabitants of the exceeding one hundred thousand Baht or to both study and therefore invented the congregation gave for the first time contains a Flood protection dykes and irrigation reservoir this method allows the cultivation.