How canals work - Revision history

Editor at 16:45, 17 September 2021

2021-09-17T16:45:39Z

← Older revision		Revision as of 16:45, 17 September 2021
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	* Movable bridge.		* Movable bridge.
	* Navigable aqueduct.		* Navigable aqueduct.
		+	* Pumping station.
	* River engineering.		* River engineering.
	* Water engineering.		* Water engineering.

Editor at 16:41, 29 July 2021

2021-07-29T16:41:37Z

← Older revision		Revision as of 16:41, 29 July 2021
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	* Aqueduct.		* Aqueduct.
	* John Rennie.		* John Rennie.
		+	* Movable bridge.
	* Navigable aqueduct.		* Navigable aqueduct.
	* River engineering.		* River engineering.

Editor at 17:37, 29 June 2021

2021-06-29T17:37:52Z

← Older revision		Revision as of 17:37, 29 June 2021
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	* Water engineering.		* Water engineering.
	* Water transfers and interconnections.		* Water transfers and interconnections.
		+	* Waterway.

	[[Category:DCN_Guidance]] [[Category:Definitions]] [[Category:Water]] [[Category:Construction_techniques]]		[[Category:DCN_Guidance]] [[Category:Definitions]] [[Category:Water]] [[Category:Construction_techniques]]

Editor at 11:42, 29 June 2021

2021-06-29T11:42:09Z

← Older revision		Revision as of 11:42, 29 June 2021
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	When horses, donkeys or other towing animals were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall or roof of the canal tunnel. Professional wall walkers could be hired to take the vessels on longer tunnels, but it was more common for the operator of the boat to handle the task with assistance from the crew.		When horses, donkeys or other towing animals were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall or roof of the canal tunnel. Professional wall walkers could be hired to take the vessels on longer tunnels, but it was more common for the operator of the boat to handle the task with assistance from the crew.
		+
		+	--[[User:Heidi_Schwartz\|Heidi Schwartz]]

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

	* Aqueduct.		* Aqueduct.
		+	* John Rennie.
	* Navigable aqueduct.		* Navigable aqueduct.
	* River engineering.		* River engineering.

Designing Buildings at 05:14, 22 September 2020

2020-09-22T05:14:01Z

← Older revision		Revision as of 05:14, 22 September 2020
Line 7:		Line 7:
	= Introduction =		= Introduction =

−	Canals are human-made channels ~~that have been~~ used ~~throughout history~~ for water conveyance (supply), or to service water transport vehicles. The oldest known canals were used for irrigation purposes~~. They were~~ built in approximately 4000 BC in the region of the Middle East that is now modern day Iraq and Iran.	+	Canals are human-made channels used for water conveyance (supply), or to service water transport vehicles. The oldest known canals were used for irrigation purposes, built in approximately 4000 BC in the region of the Middle East that is now modern day Iraq and Iran.

	= How canals are constructed =		= How canals are constructed =
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	= Canal locks in action =		= Canal locks in action =

−	~~When the vessel enters the~~ lock, the water ~~level will require adjustment~~. ~~The lock always fills from~~ the ~~upper canal~~ and ~~always drains to~~ the ~~lower canal~~.	+	A lock consists of a lock chamber which may be made from brick, stone or metal. This chamber holds the water. There are typically gates at each end of the lock chamber, and these gates control the flow of water.

−	~~A lock consists of~~ a ~~lock chamber which may be made from brick~~, ~~stone or metal. This chamber holds~~ the water. ~~There typically gates~~ at ~~each end of~~ the ~~lock chamber~~, ~~and these gates control~~ the ~~flow of water~~.	+	When a vessel is at a lower point, a gate is allowed to open, which permits water to enter the lock and fill it with water. Once the water level is at the higher height, the vessel can continue on its journey.

−	~~When~~ the vessel is at a ~~lower point, a gate is allowed~~ to ~~open, which permits water~~ to ~~enter~~ the lock ~~and fill it~~ with water. ~~Once~~ the water ~~level~~ is at the ~~proper height~~, the vessel ~~can continue on its journey~~.	+	The opposite action is used when the vessel is at a higher position and needs to proceed to a lower level. The vessel enters the lock with a high water level and then a gate opens - allowing the water to be released. When the water is at the adjusted lower level, the vessel is able to proceed.

−	The opposite action is used when the vessel is at a higher position and needs to proceed at a lower level. The vessel enters the lock with a high water level and then the gate opens - allowing the water to be released. When the water is at the adjusted lower level, the vessel is able to proceed.	+	In most instances, the main lock gates can only be opened when the water on both sides is at the same level. This means that the top lock only opens if the lock is full, and the bottom lock only opens when it is nearly empty.
−		+
−	In most instances, the ~~gate~~ can only be opened when the water on both sides is at the same level. This means that the top lock only opens if the lock is full, and the bottom lock only opens when it is nearly empty.	+

	= Legging it =		= Legging it =

−	Legging is an early method of navigating vessels through canal tunnels. This practice was sometimes used during the 18th and early 19th centuries.	+	Legging was an early method of navigating vessels through canal tunnels. This practice was sometimes used during the 18th and early 19th centuries.

	[[File:LeggingCanal.jpg\|link=File:LeggingCanal.jpg]]		[[File:LeggingCanal.jpg\|link=File:LeggingCanal.jpg]]

−	When horses, donkeys or other towing animals were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professional wall walkers could be hired to take the vessels on longer tunnels, but it was more common for the ~~owner~~ of the boat to handle the task (with assistance from the crew).	+	When horses, donkeys or other towing animals were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall or roof of the canal tunnel. Professional wall walkers could be hired to take the vessels on longer tunnels, but it was more common for the operator of the boat to handle the task with assistance from the crew.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

Editor at 20:57, 18 September 2020

2020-09-18T20:57:30Z

← Older revision		Revision as of 20:57, 18 September 2020
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	{\|		{\|
−	~~\|width="100%"~~\| [[File:CanalLock.jpg]]	+	\| [[File:CanalLock.jpg\|link=File:CanalLock.jpg]]
	\|-		\|-
	\| View up the flight of locks on the Caledonian Canal at Fort Augustus in Scotland. The canal drops to the level of Loch Ness at these locks.		\| View up the flight of locks on the Caledonian Canal at Fort Augustus in Scotland. The canal drops to the level of Loch Ness at these locks.
Line 27:		Line 27:
	= Canal locks in action =		= Canal locks in action =

−	~~Many canals use locks to manage~~ the ~~levels of~~ water~~. This is often in response to changes due to topography~~. The lock always fills from the upper canal and always drains to the lower canal.	+	When the vessel enters the lock, the water level will require adjustment. The lock always fills from the upper canal and always drains to the lower canal.

−	A lock consists of a lock chamber which may be made from brick, stone or metal. This holds the water.	+	A lock consists of a lock chamber which may be made from brick, stone or metal. This chamber holds the water. There typically gates at each end of the lock chamber, and these gates control the flow of water.
−		+
−	There typically gates at each end of the lock~~. THis allows the boats to travel through the lock~~ and ~~keep~~ the ~~water in.~~	+
−		+
−	~~The water~~ flow ~~in locks is typically controlled by paddles or gates. When the vessel enters the lock, the~~ water ~~level will require adjustment~~.	+

	When the vessel is at a lower point, a gate is allowed to open, which permits water to enter the lock and fill it with water. Once the water level is at the proper height, the vessel can continue on its journey.		When the vessel is at a lower point, a gate is allowed to open, which permits water to enter the lock and fill it with water. Once the water level is at the proper height, the vessel can continue on its journey.
Line 43:		Line 39:
	= Legging it =		= Legging it =

−	Legging is an early method of navigating vessels through canal tunnels. This practice was ~~commonly~~ used during the 18th and early 19th centuries.	+	Legging is an early method of navigating vessels through canal tunnels. This practice was sometimes used during the 18th and early 19th centuries.

	[[File:LeggingCanal.jpg\|link=File:LeggingCanal.jpg]]		[[File:LeggingCanal.jpg\|link=File:LeggingCanal.jpg]]

−	When donkeys or ~~horses~~ were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. ~~Professionals~~ could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).	+	When horses, donkeys or other towing animals were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professional wall walkers could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

Editor at 20:44, 18 September 2020

2020-09-18T20:44:36Z

← Older revision		Revision as of 20:44, 18 September 2020
Line 1:		Line 1:
		+	{\|
		+	\|width="100%"\| [[File:CanalLock.jpg]]
		+	\|-
		+	\| View up the flight of locks on the Caledonian Canal at Fort Augustus in Scotland. The canal drops to the level of Loch Ness at these locks.
		+	\|}
		+
	= Introduction =		= Introduction =

Line 39:		Line 45:
	Legging is an early method of navigating vessels through canal tunnels. This practice was commonly used during the 18th and early 19th centuries.		Legging is an early method of navigating vessels through canal tunnels. This practice was commonly used during the 18th and early 19th centuries.

−	[[File:LeggingCanal.jpg]]	+	[[File:LeggingCanal.jpg\|link=File:LeggingCanal.jpg]]

	When donkeys or horses were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professionals could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).		When donkeys or horses were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professionals could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).
Line 49:		Line 55:
	* River engineering.		* River engineering.
	* Water engineering.		* Water engineering.
		+	* Water transfers and interconnections.

	[[Category:DCN_Guidance]] [[Category:Definitions]] [[Category:Water]] [[Category:Construction_techniques]]		[[Category:DCN_Guidance]] [[Category:Definitions]] [[Category:Water]] [[Category:Construction_techniques]]

Editor at 20:39, 18 September 2020

2020-09-18T20:39:30Z

← Older revision		Revision as of 20:39, 18 September 2020
Line 37:		Line 37:
	= Legging it =		= Legging it =

−	Legging is an early method of navigating vessels through canal tunnels. It was commonly used during the 18th and early 19th centuries.	+	Legging is an early method of navigating vessels through canal tunnels. This practice was commonly used during the 18th and early 19th centuries.
		+
		+	[[File:LeggingCanal.jpg]]

	When donkeys or horses were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professionals could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).		When donkeys or horses were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professionals could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).

Editor: Created page with "= Introduction = Canals are human-made channels that have been used throughout history for water conveyance (supply), or to service water transport vehicles. The oldest known ca..."

2020-09-18T20:36:36Z

Created page with "= Introduction = Canals are human-made channels that have been used throughout history for water conveyance (supply), or to service water transport vehicles. The oldest known ca..."

New page

= Introduction =

Canals are human-made channels that have been used throughout history for water conveyance (supply), or to service water transport vehicles. The oldest known canals were used for irrigation purposes. They were built in approximately 4000 BC in the region of the Middle East that is now modern day Iraq and Iran.

= How canals are constructed =

Canals can be constructed in different ways:

* A new canal can be created by excavating the body of the canal and providing water from an external source, such as streams or reservoirs.
* Dredging a channel in the bottom of an existing lake which is then drained.
* A stream can be canalised to make its navigable path more predictable and easier to manoeuvre. This involves dredging, damming and modifying its path.

= What canals do =

Canals use engineered structures such as:

* Weirs and dams: To raise river water levels to usable depths.
* Looping descents: To create a longer and gentler channel around a stretch of rapids or falls.
* Locks: So that ships and barges can ascend and descend.

= Canal locks in action =

Many canals use locks to manage the levels of water. This is often in response to changes due to topography. The lock always fills from the upper canal and always drains to the lower canal.

A lock consists of a lock chamber which may be made from brick, stone or metal. This holds the water.

There typically gates at each end of the lock. THis allows the boats to travel through the lock and keep the water in.

The water flow in locks is typically controlled by paddles or gates. When the vessel enters the lock, the water level will require adjustment.

When the vessel is at a lower point, a gate is allowed to open, which permits water to enter the lock and fill it with water. Once the water level is at the proper height, the vessel can continue on its journey.

The opposite action is used when the vessel is at a higher position and needs to proceed at a lower level. The vessel enters the lock with a high water level and then the gate opens - allowing the water to be released. When the water is at the adjusted lower level, the vessel is able to proceed.

In most instances, the gate can only be opened when the water on both sides is at the same level. This means that the top lock only opens if the lock is full, and the bottom lock only opens when it is nearly empty.

= Legging it =

Legging is an early method of navigating vessels through canal tunnels. It was commonly used during the 18th and early 19th centuries.

When donkeys or horses were not able to follow a towpath through a tunnel, people would have to move the boat with their feet by “walking” along the wall of the canal tunnel. Professionals could be hired to take the vessels on longer tunnels, but it was more common for the owner of the boat to handle the task (with assistance from the crew).

= Related articles on Designing Buildings Wiki =

* Aqueduct.
* Navigable aqueduct.
* River engineering.
* Water engineering.

[[Category:DCN_Guidance]] [[Category:Definitions]] [[Category:Water]] [[Category:Construction_techniques]]