1D Weirs - Revision history

Pavlina Monhartova at 06:23, 18 November 2024

2024-11-18T06:23:41Z

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 =Introduction=
 A weir is a barrier across a designated flow path that is designed to alter flow characteristics. Most common weirs act as an obstruction, smaller but similar to a dam, that pools water behind it while allowing water to steadily flow over the top. Weirs within TUFLOW, like bridges, do not require data for length, Manning's n, divergence or bed slope so they are zero-length channels effectively.
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 Bath, UK (pht: Rohan King)
 Any further questions please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20weirs%20help support@tuflow.com]
 <br><br>

Pavlina Monhartova: /* Weir types that can be used within TUFLOW */

2024-11-18T06:22:57Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 16:22, 18 November 2024
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	==Weir types that can be used within TUFLOW==		==Weir types that can be used within TUFLOW==
	<br>
	;Broad-crested weir		;Broad-crested weir
	Broad Crested weirs are commonly used to measure the discharge of large rivers and canals.		Broad Crested weirs are commonly used to measure the discharge of large rivers and canals.
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	;Rectangular weir (sharp crested)		;Rectangular weir (sharp crested)
	Sharp crested weirs are used to measure discharge in small rivers and canals.		Sharp crested weirs are used to measure discharge in small rivers and canals.



	;Trapezoidal or Cippoletti weir		;Trapezoidal or Cippoletti weir
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	;Spillway		;Spillway

	<br><br><br><br><br><br><br>
	[[File:Weir_in_Bath_UK.jpg\|border\|400px]]		[[File:Weir_in_Bath_UK.jpg\|border\|400px]]
	<br>		<br>

ElizaCollison: /* Typical check files used */

2023-01-03T21:41:41Z

Typical check files used

← Older revision		Revision as of 07:41, 4 January 2023
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	Any further questions please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20weirs%20help support@tuflow.com]		Any further questions please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20weirs%20help support@tuflow.com]
	<br><br>		<br><br>
			{{Tips Navigation
	Back to [[TUFLOW_1D_Hydraulic_Structures \| 1D Hydraulic Structures]]
			\|uplink=[[ TUFLOW 1D Channels and Hydraulic Structures \| Back to 1D Channels and Hydraulic Structures]]
			}}

Rohan.king: /* Typical check files used */

2016-10-13T05:11:01Z

Typical check files used

← Older revision		Revision as of 15:11, 13 October 2016
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	<br>		<br>
	<br>		<br>
	Any further questions please email TUFLOW support: [mailto:support@tuflow.com support@tuflow.com]		Any further questions please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20weirs%20help support@tuflow.com]
	<br><br>		<br><br>
	Back to [[TUFLOW_1D_Hydraulic_Structures \| 1D Hydraulic Structures]]		Back to [[TUFLOW_1D_Hydraulic_Structures \| 1D Hydraulic Structures]]

Rohan.king: /* Weir types that can be used within TUFLOW */

2016-07-22T02:04:43Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 12:04, 22 July 2016
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	<br>		<br>
	;Broad-crested weir		;Broad-crested weir
	Broad Crested weirs are commonly used to measure the discharge of rivers.		Broad Crested weirs are commonly used to measure the discharge of large rivers and canals.

	[[File:Broad-crested weir.jpg\|thumb\|none\|400px\|https://i.ytimg.com/vi/SNYqKkjHacE/maxresdefault.jpg]]		[[File:Broad-crested weir.jpg\|thumb\|none\|400px\|https://i.ytimg.com/vi/SNYqKkjHacE/maxresdefault.jpg]]

Rohan.king: /* Weir types that can be used within TUFLOW */

2016-07-22T02:03:51Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 12:03, 22 July 2016
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	==Weir types that can be used within TUFLOW==		==Weir types that can be used within TUFLOW==
	*''under construction''
	<br>		<br>
	;Broad-crested weir		;Broad-crested weir
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	[[File:Broad-crested weir.jpg\|thumb\|none\|400px\|https://i.ytimg.com/vi/SNYqKkjHacE/maxresdefault.jpg]]		[[File:Broad-crested weir.jpg\|thumb\|none\|400px\|https://i.ytimg.com/vi/SNYqKkjHacE/maxresdefault.jpg]]

	<br>
	;Crump weir		;Crump weir
	The Crump Weir models a triangular profile weir with a 1:2 sloping front face and a 1:5 sloping back face. This type of weir are used as measuring structures within open channel.		The Crump Weir models a triangular profile weir with a 1:2 sloping front face and a 1:5 sloping back face. This type of weir are used as measuring structures within open channel.
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	[[File:Crump_weir - lamprey-barrier.jpg\|thumb\|none\|400px\|https://ecofactireland.files.wordpress.com/2014/04/lamprey-barrier.jpg]]		[[File:Crump_weir - lamprey-barrier.jpg\|thumb\|none\|400px\|https://ecofactireland.files.wordpress.com/2014/04/lamprey-barrier.jpg]]

	<br>
	;Ogee-crested weir		;Ogee-crested weir
	An ogee-crested weir is a special type of weir, generally used as a spillway of a dam as shown in figure. The crest of an ogee weir slightly rises up from the inside edge (i.e., a slight hump on top of the weir) and falls in a parabolic form over the edge of the weir.		An ogee-crested weir is a special type of weir, generally used as a spillway of a dam as shown in figure. The crest of an ogee weir slightly rises up from the inside edge (i.e., a slight hump on top of the weir) and falls in a parabolic form over the edge of the weir.
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	[[File:Ogee-crested weir.jpg\|thumb\|none\|400px\|http://www.ancold.org.au/wp-content/uploads/2014/08/Figure-2Harvey-Dam-Ogee-crest-over-flowing-for-the-first-time.jpg]]		[[File:Ogee-crested weir.jpg\|thumb\|none\|400px\|http://www.ancold.org.au/wp-content/uploads/2014/08/Figure-2Harvey-Dam-Ogee-crest-over-flowing-for-the-first-time.jpg]]

	<br>
	;Rectangular weir (sharp crested)		;Rectangular weir (sharp crested)
	Sharp crested weirs are used to measure discharge in small rivers and canals.		Sharp crested weirs are used to measure discharge in small rivers and canals.



	<br>
	;Trapezoidal or Cippoletti weir		;Trapezoidal or Cippoletti weir
	The "Cippoletti" weir is a trapezoidal shaped weir. The purpose of the slope, on the sides, is to obtain an increased discharge through the triangular portions of the weir, which otherwise would have been decreased due to end contractions in the case of rectangular weirs.		The "Cippoletti" weir is a trapezoidal shaped weir. The purpose of the slope, on the sides, is to obtain an increased discharge through the triangular portions of the weir, which otherwise would have been decreased due to end contractions in the case of rectangular weirs.
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	[[File:V-notch weir.jpg\|thumb\|none\|400px\|http://wintertracadie.ca/wp-content/uploads/2013/12/V-notch-weir-to-measure-spring-flow.jpg]]		[[File:V-notch weir.jpg\|thumb\|none\|400px\|http://wintertracadie.ca/wp-content/uploads/2013/12/V-notch-weir-to-measure-spring-flow.jpg]]

	<br>
	;Spillway		;Spillway

Rohan.king: /* Weir types that can be used within TUFLOW */

2016-07-22T02:02:33Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 12:02, 22 July 2016
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	<br>		<br>
	;Rectangular weir (sharp crested)		;Rectangular weir (sharp crested)
			Sharp crested weirs are used to measure discharge in small rivers and canals.


	<br>		<br>

Rohan.king: /* Weir types that can be used within TUFLOW */

2016-07-22T01:59:48Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 11:59, 22 July 2016
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	;V-notch weir		;V-notch weir
			V-notch weirs are typically installed in open channels to determine discharge. The basic principle is that discharge is directly related to the water depth above the bottom of the V. The V-notch design causes small changes in discharge to have a large change in depth allowing more accurate head measurement than with a rectangular weir.

	[[File:V-notch weir.jpg\|thumb\|none\|400px\|http://wintertracadie.ca/wp-content/uploads/2013/12/V-notch-weir-to-measure-spring-flow.jpg]]		[[File:V-notch weir.jpg\|thumb\|none\|400px\|http://wintertracadie.ca/wp-content/uploads/2013/12/V-notch-weir-to-measure-spring-flow.jpg]]

Rohan.king: /* Weir types that can be used within TUFLOW */

2016-07-22T01:47:32Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 11:47, 22 July 2016
Line 28:		Line 28:

	<br>		<br>
	;Rectangular weir		;Rectangular weir (sharp crested)

	<br>		<br>

Rohan.king: /* Weir types that can be used within TUFLOW */

2016-07-22T01:41:19Z

Weir types that can be used within TUFLOW

← Older revision		Revision as of 11:41, 22 July 2016
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	<br>		<br>
	;Ogee-crested weir		;Ogee-crested weir
	An ogee-crested weir is a special type of weir, generally used as a spillway of a dam as shown in figure. The crest of an ogee weir slightly rises up from the inside edge (i.e., a slight hump on top of the weir) and ~~after reaching the maximum rise of 0.115 H (where H is the height of the water above the inside edge)~~ falls in a parabolic form over the edge of the weir.		An ogee-crested weir is a special type of weir, generally used as a spillway of a dam as shown in figure. The crest of an ogee weir slightly rises up from the inside edge (i.e., a slight hump on top of the weir) and falls in a parabolic form over the edge of the weir.

	[[File:Ogee-crested weir.jpg\|thumb\|none\|400px\|http://www.ancold.org.au/wp-content/uploads/2014/08/Figure-2Harvey-Dam-Ogee-crest-over-flowing-for-the-first-time.jpg]]		[[File:Ogee-crested weir.jpg\|thumb\|none\|400px\|http://www.ancold.org.au/wp-content/uploads/2014/08/Figure-2Harvey-Dam-Ogee-crest-over-flowing-for-the-first-time.jpg]]
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	;V-notch weir		;V-notch weir

	[[File:V-notch weir.jpg\|none\|400px\|http://wintertracadie.ca/wp-content/uploads/2013/12/V-notch-weir-to-measure-spring-flow.jpg]]		[[File:V-notch weir.jpg\|thumb\|none\|400px\|http://wintertracadie.ca/wp-content/uploads/2013/12/V-notch-weir-to-measure-spring-flow.jpg]]

	<br>		<br>