Possible Clues:

• Bucket wheel used for irrigation
• Waterwheel
• Water-raising device
• Set up a metal device helping irrigation
• Looking back at Ronald with one at a waterwheel
• Water wheel
• Irrigation apparatus used to raise water
• Endless chain of buckets raising water from a stream
• Put oar in clumsily, raising water from the stream
• Seaweed needs a supplier of water