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Locks are needed when the waterway flows down/up hill. Instead of going over a waterfall, you 'lower' the vessel using a series of locks.
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Why are locks needed on some canals but not not others?
because of the elevation
The St Lawrence Waterway has many locks what do locks do why are they needed on some canals but not on others'?
Locks on canals are used as a means of effectively going up or down hill. Water will always find its own level, therefore letting water flow into a system of locks allows gradients to be navigated by the vessels using the waterway. The number of locks will depend on how flat or otherwise the land needed to be passed through!
What were the disadvantages of canals?
People needed to dig up a lot of ground to make them. Some were made obsolete by the railroad soon after they were constructed. Canals need a lot of water in order for the boats to sail on them. In the winter the water can turn to ice. In the summer, the water can dry up. Boats that are bigger than the locks of the canal can't use them.
What are some of Canada's transportation corridors?
A few are Rivers, coastal waters, sometimes combined with canals and locks, provide convenient travel routes!
What are some Assyrian invintions?
Plow, writing, wheel and canals and many others.
What is polypulpopathy?
In the same tooth, some root canals are necrotic while the others are vital.
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what are canals
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The Shannon and the Royal Canal. There are many others as Ireland has many rivers and some canals.
What are some famous canals in Malta?
No canals or rivers in Malta
What are some famous canals in Cyprus?
There aren't any canals
What kind of canals are there?
They are some canals that are different then the other ones in the world
