Indonesia Rice Irrigation Bandung Indonesia Southeast Asia
This is rice terracing done between Jakarta, Indonesia and Bandung, Indonesia as seen from the Train. It is amazing the amount of water that is channeled from one high spot, to a lower spot by gravity, and how they are capable of doing this.
I saw the control of water for rice in Banaue Philippines; however, this may challenge that as more complicated, as there are numerous small hills and peaks, while Banaue was more or less large valleys.
If you look closely at this photo, you will see many pipes that are leading to the water. By taking pipes, you can move water from a high point to a point across a mountain and to another valley. In effect moving water from one value to another valley.