Canal

Canals and navigations are human-made channels for water. In the vernacular both are referred to as 'canals'. The main difference between them is that a navigation parallels a river and shares its drainage basin, while a canal cuts across a drainage divide.

Types of artificial waterways

A navigation is a series of channels that run roughly parallel to the valley and stream bed of an unimproved river. A navigation always shares the drainage basin of the river. A vessel uses the calm parts of the river itself as well as improvements, traversing the same changes in height.

A true canal is a channel that cuts across a drainage divide, making a navigable channel connecting two different drainage basins.

Most commercially important canals of the first half of the 19th-century were a little of each, using rivers in long stretches, and divide crossing canals in others. This is true for many canals still in use.

Structures used in artificial waterways

Both navigations and canals use engineered structures to improve navigation:

Latest News for: Discovery canal

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Three letters, one number, a knife and a stone bridge: How a graffitied equation changed ...

Phys Dot Org 16 Oct 2024
On October 16, 1843, the Irish mathematician William Rowan Hamilton had an epiphany during a walk alongside Dublin's Royal Canal. He was so excited he took out his penknife and carved his discovery right then and there on Broome Bridge ... He hoped that one day—"never mind when"—he might be thanked for his discovery, but this was not vanity ... Citation....
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NIAGARA DISCOVERIES: DeWitt Clinton's trip through Niagara County continues

Niagara Gazette 13 Oct 2024
Last week Niagara Discoveries ended with DeWitt Clinton and the Erie Canal Commissioners returning to Lewiston from their visit to Queenston on the Canadian side ... ....
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Scientists in France recreate the head of ancient 9-foot-long bug

Journal Gazette 12 Oct 2024
And with each new fossil discovery and dinosaur movie release, our intrigue with these prehistoric predators only grows ... Discoveries are happening in real time, too ... The Chesapeake and Delaware Canal is a major discovery site of dinosaur remains. The Cretaceous-period fossils became unearthed during the canal's construction....

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