Canal
man-made channel for water
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A canal is a waterway made by humans. For many centuries, canals have been built as a way of transporting heavy goods in barges or boats. Canals often connect lakes, rivers, or oceans. The Panama Canal is a famous canal that connects the Atlantic Ocean with the Pacific Ocean. Many canals are reinforced with clay or concrete on the sides and have locks.

A US warship in the Suez Canal
Other canals are used for irrigation or hydropower.
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Wikimedia Commons has media related to Canals.