1D Manholes - Revision history

Emilie Nielsen: /* Manhole Storage */

2026-03-02T02:43:20Z

Manhole Storage

← Older revision		Revision as of 12:43, 2 March 2026
Line 77:		Line 77:
	<br>		<br>

	For more information on storage nodes refer to the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ \| TUFLOW Manual]</u>. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please contact [mailto:support@tuflow.com support@tuflow.com].		For more information on storage nodes refer to the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u>. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please contact [mailto:support@tuflow.com support@tuflow.com].
	<br><br>		<br><br>
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Emilie Nielsen: /* Manhole Losses */

2026-03-02T02:43:01Z

Manhole Losses

← Older revision		Revision as of 12:43, 2 March 2026
Line 16:		Line 16:

	=Manhole Losses=		=Manhole Losses=
	When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in ~~section 5.12.5.4 of~~ the [https://~~downloads~~.tuflow.com/~~_archive~~/~~TUFLOW~~/~~Releases~~/~~2018-03/TUFLOW%20Manual.2018-03.pdf~~ TUFLOW ~~user manual~~] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:		When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in the [https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:
	<br>		<br>
	<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.		<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.

Emilie Nielsen: /* Manhole Storage */

2026-03-02T02:41:53Z

Manhole Storage

← Older revision		Revision as of 12:41, 2 March 2026
Line 76:		Line 76:
	[[File:Storage_chamber_csv.JPG\|border\|400px]]		[[File:Storage_chamber_csv.JPG\|border\|400px]]
	<br>		<br>

	For more information on storage nodes ~~see~~ ~~Section 5.11.4 ''Manholes'' within~~ the [https://~~downloads~~.tuflow.com/~~TUFLOW~~/~~Releases~~/~~Latest~~/~~TUFLOW%20Manual.pdf~~\| TUFLOW ~~Classic/HPC User~~ Manual ~~2025.0~~]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please ~~email TUFLOW support:~~ [mailto:support@tuflow.com~~?Subject=TUFLOW%201D%20manholes%20help~~ support@tuflow.com]		For more information on storage nodes refer to the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ \| TUFLOW Manual]</u>. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please contact [mailto:support@tuflow.com support@tuflow.com].
	<br><br>		<br><br>
	{{Tips Navigation		{{Tips Navigation

Anne.Kolega: updated link

2026-02-24T04:23:06Z

updated link

← Older revision		Revision as of 14:23, 24 February 2026
Line 76:		Line 76:
	[[File:Storage_chamber_csv.JPG\|border\|400px]]		[[File:Storage_chamber_csv.JPG\|border\|400px]]
	<br>		<br>
	For more information on storage nodes see Section 5.11.4 ''~~Storage Nodes (User Defined NA Tables)~~'' within the [https://downloads.tuflow.com/TUFLOW/Releases/Latest/TUFLOW%20Manual.pdf\| TUFLOW ~~user~~ ~~manual~~]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]		For more information on storage nodes see Section 5.11.4 ''Manholes'' within the [https://downloads.tuflow.com/TUFLOW/Releases/Latest/TUFLOW%20Manual.pdf\| TUFLOW Classic/HPC User Manual 2025.0]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]
	<br><br>		<br><br>
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Abigail.lillo: /* Manhole Storage */

2024-03-01T06:45:06Z

Manhole Storage

← Older revision		Revision as of 16:45, 1 March 2024
Line 76:		Line 76:
	[[File:Storage_chamber_csv.JPG\|border\|400px]]		[[File:Storage_chamber_csv.JPG\|border\|400px]]
	<br>		<br>
	For more information on storage nodes see Section 5.11.4 ''Storage Nodes (User Defined NA Tables)'' within the [https://~~www~~.tuflow.com~~/Download~~/TUFLOW/Releases/~~2018-03~~/TUFLOW%20Manual~~.2018-03~~.pdf\| TUFLOW user manual]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]		For more information on storage nodes see Section 5.11.4 ''Storage Nodes (User Defined NA Tables)'' within the [https://downloads.tuflow.com/TUFLOW/Releases/Latest/TUFLOW%20Manual.pdf\| TUFLOW user manual]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]
	<br><br>		<br><br>
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Abigail.lillo at 23:25, 15 October 2023

2023-10-15T23:25:14Z

← Older revision		Revision as of 09:25, 16 October 2023
Line 76:		Line 76:
	[[File:Storage_chamber_csv.JPG\|border\|400px]]		[[File:Storage_chamber_csv.JPG\|border\|400px]]
	<br>		<br>
	For more information on storage nodes see Section 5.10.3 ''Storage Nodes (User Defined NA Tables)'' within the [https://www.tuflow.com/Download/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]		For more information on storage nodes see Section 5.11.4 ''Storage Nodes (User Defined NA Tables)'' within the [https://www.tuflow.com/Download/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]
	<br><br>		<br><br>
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ElizaCollison at 21:42, 3 January 2023

2023-01-03T21:42:39Z

← Older revision		Revision as of 07:42, 4 January 2023
Line 77:		Line 77:
	<br>		<br>
	For more information on storage nodes see Section 5.10.3 ''Storage Nodes (User Defined NA Tables)'' within the [https://www.tuflow.com/Download/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]		For more information on storage nodes see Section 5.10.3 ''Storage Nodes (User Defined NA Tables)'' within the [https://www.tuflow.com/Download/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual]. If you have any further questions about manholes or any other aspect of TUFLOW functionality, please email TUFLOW support: [mailto:support@tuflow.com?Subject=TUFLOW%201D%20manholes%20help support@tuflow.com]
	<br>		<br><br>
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	Back to [[TUFLOW_1D_Hydraulic_Structures \| 1D Hydraulic Structures]]
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Tuflowduncan: /* Manhole Losses */

2021-12-22T10:15:26Z

Manhole Losses

← Older revision		Revision as of 20:15, 22 December 2021
Line 16:		Line 16:

	=Manhole Losses=		=Manhole Losses=
	When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in section 5.12.5.4 of the [https://downloads.tuflow.com/_archive/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf \| TUFLOW user manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:		When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in section 5.12.5.4 of the [https://downloads.tuflow.com/_archive/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf TUFLOW user manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:
	<br>		<br>
	<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.		<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.

Tuflowduncan: /* Manhole Losses */

2021-12-22T10:15:06Z

Manhole Losses

← Older revision		Revision as of 20:15, 22 December 2021
Line 16:		Line 16:

	=Manhole Losses=		=Manhole Losses=
	When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in section 5.12.5.4 of the [https://downloads.tuflow.com/_archive/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:		When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in section 5.12.5.4 of the [https://downloads.tuflow.com/_archive/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf \| TUFLOW user manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:
	<br>		<br>
	<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.		<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.

Tuflowduncan: /* Manhole Losses */

2021-12-22T10:14:26Z

Manhole Losses

← Older revision		Revision as of 20:14, 22 December 2021
Line 16:		Line 16:

	=Manhole Losses=		=Manhole Losses=
	When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in section 5.12.5.4 of the [https://~~www~~.tuflow.com/~~Download~~/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:		When modelling conduit pipe flows, the head losses that the flow in pipe are subject to are made up of major losses (or friction losses) and minor losses (or local losses). Major losses are caused by forces between the flow and wetted perimeter of the conduit. Minor losses are caused by disruption to the flow due to bends, cross-sectional changes, fittings such as manholes and steps in the bed profile. Major losses are represented through the specification of a friction coefficient. The representation of minor losses, particularly for gravity networks, is at manholes and requires separate treatment. The default TUFLOW/Estry manhole loss approach uses the Engelund method explained in section 5.12.5.4 of the [https://downloads.tuflow.com/_archive/TUFLOW/Releases/2018-03/TUFLOW%20Manual.2018-03.pdf\| TUFLOW user manual] although it is also possible to use a more simplified fixed manhole headloss approach too using the global <font color="blue"><tt>Manhole Default Loss Approach</tt></font> command or specifying within the '1d_mH_*' layer in the Loss_Approach attribute. The Engelund approach provides an automatic method for determining the loss coefficients as presented below. Of note is that the coefficients are recalculated every timestep, and therefore vary depending on the flow distribution between inlet and outlet conduits and the depth of water within the manhole. The losses represented are as follows:
	<br>		<br>
	<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.		<li>'''K<sub>entry</sub>''' covers the expansion of flow within the manhole at the outlet of an inlet conduit. The coefficient is applied as the exit loss of the inlet conduit.