Irrigation
The different levels of The Hanging Gardens of Babylon were very high up, and it barely ever rained in Babylon, so how were the plants irrigated? The Babylonians created a water pump that transported water from the Euphrates River up to the Hanging Gardens. They created the pump by attaching buckets to a chain. The chain was connected to two big wheels at the top and bottom. These would allow the chain to come back up after it went to the bottom to retrieve the water. Slaves powered the chain by pulling it so that it would continue to move. As the chain moved, the buckets would go into the river and fill with water. They tipped over at the top of the pump so that the high gardens could be reached and irrigated. The water traveled down channels so that all of the plants could be watered. This picture indicates what the irrigation system might have looked like.