Have you ever seen a water-wheel?
This method of getting water for irrigation has been used for hundreds of years in my home village, in the central of Vietnam. I was very delighted when I spotted this mini water-wheel during my visit back home.
When I was a child, I often went pass a big water-wheel on my way to visit my grandparents. But this water-wheel is much smaller, perhaps it is made by some individual farmer for his own field only. On this small riverlet, I saw quite a few of them working to move the water.
If you want to see how it works, click on the link for a video clip here.