Ditch irrigator sprayer - GIF

[Moby Duck]

What a pity they haven't worked out how to make it turn at the end, and do the whole series of canals. I suspect putting curved banks at the end, and/or a curved guide on the front of the raft might let it run and turn into adjacent canals automatically. Perhaps even building the raft wit 45 or 60 degree pipe fittings at the front would be enough to make it turn.