Abstract: This invention relates to system for and method of moving sea water by utilizing tidal flow and ebb. This is achieved by the provision of at least one reservoir in the vicinity of the seashore and at least one tidewater channel connecting the reservoir and the seashore and also the provision of a plurality of floodgates on both reservoir and tidewater channel, the floodgates being adapted to be opened and shut in accordance with the tides of the sea for producing uni-directional current of tidewater through the tidewater channel.