- published: 25 Apr 2016
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Canals are man-made channels for water. There are two types of canal:
Canals are created in one of three ways, or a combination of the three, depending on available water and available path:
Smaller transportation canals can carry barges or narrowboats, while ship canals allow seagoing ships to travel to an inland port (e.g., Manchester Ship Canal), or from one sea or ocean to another (e.g., Caledonian Canal, Panama Canal).
At their simplest, canals consist of a trench filled with water. Depending on the stratum the canal passes through, it may be necessary to line the cut with some form of watertight material such as clay or concrete. When this is done with clay it is known as puddling.
Canals need to be level, and, while small irregularities in the lie of the land can be dealt with through cuttings and embankments, for larger deviations, other approaches have been adopted. The most common is the pound lock, which consists of a chamber within which the water level can be raised or lowered connecting either two pieces of canal at a different level or the canal with a river or the sea. When there is a hill to be climbed, flights of many locks in short succession may be used.
My Friends Tigger and Pooh Theme Song
My Friends Tigger and Pooh
Were always there for each other
Youll see just how fun it can be
With so much in the world to discover
And if I need help on the way
Buster might save the day
Or Piglet, Lumpy or Roo
Eeyore has a paw to lend
Rabbit has an ear to bend
Now all were missing is you
Hooray its a honey-ful day
So lets laugh and lets play here together
With My Friends Tigger and Pooh
My Friends Tigger and Pooh
My Friends Tigger and Pooh