Artificial channels are man-made waterways used to transport water from one place to another. An AQUEDUCT is an artificial channel that carries water over a long distance, usually over a bridge or through a tunnel. A SLUICE is a type of artificial channel that is used to control the flow of water, often for irrigation purposes. A CANAL is a man-made waterway that is used to connect two bodies of water or to provide a navigable route between two places. A FLUME is an artificial channel that is used to transport water over a short distance, usually with a steep gradient. All of these terms refer to artificial channels, which are man-made waterways used to transport water from one place to another.