An aqueduct is a man-made channel that lets the water flow into the big cites. We use running water daily, and for an example, your shower will have running water when you turn it on or when you are using your faucet to wash your hands or to clean the dishes. The Romans didn’t invent the aqueduct, but they perfected the design of the aqueduct. Here is an image of how a Roman aqueduct works:
The water would be collected from a lake or river and taken down a tube to the inspection shafts, and then it would go through to the settling tank. From there, the water would go over a bridge, and then the water would be led into the distribution tank and then into different places in the city. I like the bridges for the water because they let the river go through, and they can hold water at the top.