In message , at 09:41:57 on Tue, 6 Aug 2019,
Gareth's was W7 now W10 Downstairs Computer
remarked:

Canals weren't designed to carry a significant flow of water.

With the exception of the LLangollen Canal which is a source of
drinking water for Manchester.

Then technically it is an aqueduct...

The Pontcysyllte Aqueduct is famous on that canal.

That's a different meaning of the word "Aqueduct", being the waterways
version of a viaduct.

It doesn't imply the water itself is part of a wider scheme to supply
water over a long distance (although sometimes, by coincidence, the two
will co-exist).
--
Roland Perry