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The Guardian - UK

Canals – where does the water come from? Do they ever flood?

Canal Boat / Narrow Boat in late summer with Bales in Background — How do canals work? Photograph: Alamy Stock Photo

Canals - where does the water come from? How is it delivered? How is the water level maintained? Do they ever flood, being stagnant with no inflow or outflow? And what happens with all the weeds/debris and assorted muck?

Peter Holt, King’s Lynn, Norfolk

• Post your answers – and new questions – below or email them to nq@theguardian.com

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