Also called the "Heavenly Wheel," this towering device usually stands along the riverbank. Around its rim are …
Also called the "Heavenly Wheel," this towering device usually stands along the riverbank. Around its rim are many rows of bamboo tubes, with some designs having up to forty-two of them. The water current drives the main wheel. Each tube dips, fills, ascends, and tips its burden into a wooden trough, sending water coursing into the fields beyond.