Contents preface (VII) introduction 1—37

3.10. METHODS OF IRRIGATION
Any irrigation system would consist of the following four subsystems (2):
(i) The water supply subsystem which may include diversion from rivers or surface ponds or pumped flow of ground water.
(ii) The water delivery subsystem which will include canals, branches, and hydraulic structures on these.
(iii) The water use subsystems, which can be one of the four main types, namely, (a) surface irrigation, (b) subsurface irrigation, (c) sprinkler irrigation, and (d) trickle irrigation.
(iv) The water removal system i.e., the drainage system.
In this section, the water use subsystems have been described.