By providing information on surface and groundwater, the satellite data help in planning conjunctive use of surface and groundwater. Satellite data, as pointed out earlier, enable mapping of surface water bodies like minor, medium and major irrigation tanks/reservoirs; prospective groundwater zones, and canal and groundwater irrigated areas; and planning of new reservoirs/tanks. By suing such information, conjunctive use and management of surface and groundwater resources can be planned and implemented.