On 2014-07-05 14:50, Peter Wendorff wrote :
Hi,
so you would call the Mittellandkanal, connecting Elbe and Weser in
Germany a lake?

I agree with Bulwersator. A canal does not necessarily have a flow
direction. It may be built for water transport (then it might have one),
it may be built inclining - indicating a "natural" flow. It may even
have alternating flow when water is taken out on either side depending
on weather or something like that.

But it's definitly not a lake just because there's no flow direction.

regards
Peter
Lakes usually flow, and I would guess more than canals that are not water ducts.
They're mostly a river meeting a hole, filling it and overflowing at the other end.
And if you think of the Lac Léman and the river Rhone, that may be quite a flow.

Unless it parallels a river, a canal like the Mittellandkanal  is usually for navigation between two rivers or other canals of two different basins.  In that case, it is prevented to flow with locks but it still flows a bit, naturally.  Normally, some middle point of it is higher than each end, else, the water would have flown without digging a canal and the canal would be of the river diverting kind.  And the water flows from that middle point in both directions towards the two basins. The slight flow is fed in from some rivers.
So, typical canals are bi-one-way if I may say.

Cheers,

André.

Am 22.06.2014 12:58, schrieb Martin Koppenhoefer:

Am 22/giu/2014 um 11:35 schrieb bulwersator <bulwersa...@zoho.com>:

Canal is just man-made channel for water and existence of ones without flow is possible.
I encountered some (between lakes).

when there is no flow it is a lake itself ;-)


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