This Technical Report deals with automatic irrigation Systems based on hydraulic devices using only the from the water in the irrigation System : it gives main definitions and a classification of these Systems. run by hydraulic control, it energy that tan be obtained This Technical Report applies to automatic control Systems, in which the control of water application is achieved by means of water quantity measurement. Semi-automatic control Systems are used with irrigation Systems under pressure and are capable of controlling the delivery of a preset quantity for one irrigation cycle. Esch subsequent irrigation cycle requires a further manual Operation to preset the required water quantities.