Canal
From The Art and Popular Culture Encyclopedia
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| - | '''Canals''' or '''artificial waterways''' are [[waterway]]s or [[river engineering|engineered]] [[channel (geography)|channel]]s built for [[drainage]] management (e.g. [[flood control]] and [[irrigation]]) or for conveyancing [[water transport]] [[watercraft|vehicle]]s (e.g. [[water taxi]]). They carry free, calm surface flow under [[atmospheric pressure]], and can be thought of as artificial [[river]]s. | + | '''Canals''' or '''artificial waterways''' are [[waterway]]s or [[river engineering|engineered]] [[channel (geography)|channel]]s built for [[drainage]] management or for conveyancing [[water transport]] [[watercraft|vehicle]]s. They carry free, calm surface flow under [[atmospheric pressure]], and can be thought of as artificial [[river]]s. |
| In most cases, a canal has a series of [[dam]]s and [[lock (water transport)|locks]] that create [[reservoir]]s of low speed current flow. These reservoirs are referred to as ''slack water levels'', often just called ''levels''. A canal can be called a '''navigation canal''' when it parallels a natural river and shares part of the latter's [[discharge (hydrology)|discharge]]s and [[drainage basin]], and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its [[valley]]. | In most cases, a canal has a series of [[dam]]s and [[lock (water transport)|locks]] that create [[reservoir]]s of low speed current flow. These reservoirs are referred to as ''slack water levels'', often just called ''levels''. A canal can be called a '''navigation canal''' when it parallels a natural river and shares part of the latter's [[discharge (hydrology)|discharge]]s and [[drainage basin]], and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its [[valley]]. | ||
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"When Domenico Fontana accepted the appointment of architect to the Viceroy Juan de Zúñiga, 1st Duke of Peñaranda his crew, while building a canal, confirmed the location of the ancient city of Pompeii."--Sholem Stein |
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Canals or artificial waterways are waterways or engineered channels built for drainage management or for conveyancing water transport vehicles. They carry free, calm surface flow under atmospheric pressure, and can be thought of as artificial rivers.
In most cases, a canal has a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as slack water levels, often just called levels. A canal can be called a navigation canal when it parallels a natural river and shares part of the latter's discharges and drainage basin, and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its valley.
A canal can cut across a drainage divide atop a ridge, generally requiring an external water source above the highest elevation. The best-known example of such a canal is the Panama Canal.
Many canals have been built at elevations, above valleys and other waterways. Canals with sources of water at a higher level can deliver water to a destination such as a city where water is needed. The Roman Empire's aqueducts were such water supply canals.
The term was once used to describe linear features seen on the surface of Mars, Martian canals, an optical illusion.
See also
- Beaver, a non-human animal also known for canal building
- Canal elevator
- Calle canal
- Canal & River Trust
- Canal tunnel
- Environment Agency
- Horse-drawn boat
- Irrigation district
- Lists of canals
- List of navigation authorities in the United Kingdom
- List of waterways
- List of waterway societies in the United Kingdom
- Mooring
- Navigation authority
- Roman canals – (Torksey)
- Volumetric flow rate
- Water bridge
- Waterscape
- Water transportation
- Waterway restoration
- Waterways in the United Kingdom
- Weigh lock
