One-Dimensional Hydraulic Models - Revision history

Mpollei@gfnet.com at 20:57, 21 July 2023

2023-07-21T20:57:04Z

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	HEC-RAS is a program commonly used to generate one-dimensional hydraulic models ([https://www.hec.usace.army.mil/ Hydrologic Engineering Center, USACE])		HEC-RAS is a program commonly used to generate one-dimensional hydraulic models.
			(Image Source: [https://www.hec.usace.army.mil/ Hydrologic Engineering Center, USACE])
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Mpollei@gfnet.com at 21:54, 11 July 2023

2023-07-11T21:54:10Z

← Older revision		Revision as of 21:54, 11 July 2023
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946), FEMA~~, 2013~~]]		{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946), FEMA]]

	==Trainings==		==Trainings==

Grichards at 22:34, 21 February 2023

2023-02-21T22:34:52Z

← Older revision		Revision as of 22:34, 21 February 2023
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946), FEMA, 2013]]		{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946), FEMA, 2013]]

			==Trainings==
			{{Website Icon}} [[Technical Seminar: HEC-RAS]]

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Rmanwaring at 22:24, 19 December 2022

2022-12-19T22:24:47Z

← Older revision		Revision as of 22:24, 19 December 2022
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	“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream..." <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| ~~FEMA P-946~~ Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013]]</ref>		“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream..." <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946), FEMA, 2013]]</ref>

	"One dimensional models are best suited to geographic regions with moderate to steep slopes whereby floodwaters are contained within a relatively narrow [[floodplain]] and generally flow in the direction of a single stream line without major or frequent divergence of flow. Confined floodplains are found in most parts of the United States and can range from deep entrenched rivers located within mountain ranges to wide coastal plain rivers. Confined floodplains typically present the engineer with a one-dimensional problem for which the one-dimensional assumption of many hydraulic models can yield meaningful results."<ref name ="FEMA"/>		"One dimensional models are best suited to geographic regions with moderate to steep slopes whereby floodwaters are contained within a relatively narrow [[floodplain]] and generally flow in the direction of a single stream line without major or frequent divergence of flow. Confined floodplains are found in most parts of the United States and can range from deep entrenched rivers located within mountain ranges to wide coastal plain rivers. Confined floodplains typically present the engineer with a one-dimensional problem for which the one-dimensional assumption of many hydraulic models can yield meaningful results."<ref name ="FEMA"/>
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946)\|Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) ~~(Federal Emergency Management Agency)~~]]		{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946), FEMA, 2013]]

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Grichards at 23:22, 13 December 2022

2022-12-13T23:22:01Z

← Older revision		Revision as of 23:22, 13 December 2022
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	“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream...		“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream..." <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| FEMA P-946 Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013]]</ref>

	One dimensional models are best suited to geographic regions with moderate to steep slopes whereby floodwaters are contained within a relatively narrow floodplain and generally flow in the direction of a single stream line without major or frequent divergence of flow. Confined floodplains are found in most parts of the United States and can range from deep entrenched rivers located within mountain ranges to wide coastal plain rivers. Confined floodplains typically present the engineer with a one-dimensional problem for which the one-dimensional assumption of many hydraulic models can yield meaningful results.		"One dimensional models are best suited to geographic regions with moderate to steep slopes whereby floodwaters are contained within a relatively narrow [[floodplain]] and generally flow in the direction of a single stream line without major or frequent divergence of flow. Confined floodplains are found in most parts of the United States and can range from deep entrenched rivers located within mountain ranges to wide coastal plain rivers. Confined floodplains typically present the engineer with a one-dimensional problem for which the one-dimensional assumption of many hydraulic models can yield meaningful results."<ref name ="FEMA"/>

	“One-dimensional models only provide a depth and discharge at computational cross-sections along the river. Although this process may be appropriate for confined alluvial floodplains/channels, errors in the unsteady simulation may be introduced in unconfined flat areas.		“One-dimensional models only provide a depth and discharge at computational cross-sections along the river. Although this process may be appropriate for confined alluvial floodplains/channels, errors in the unsteady simulation may be introduced in unconfined flat areas."<ref name ="FEMA"/>

	“When a flood wave enters an unconfined floodplain, one-dimensional routing is no longer a valid assumption. Geographic regions with flat to mild slopes, areas of depressed terrain, poorly defined flow paths, alluvial fans, and fluvial areas typically exhibit unconfined floodplains whereby floodwaters are not contained within a well-defined floodplain and generally flow in multiple directions, often with frequently diverging and converging flows. Unconfined floodplains are highly unpredictable and can exhibit both deep and shallow flooding with significant lateral differences in water surface elevations. Unconfined floodplains are found in areas ranging from ~~flay~~ swampy areas and coastal regions to mountain valleys.		“When a flood wave enters an unconfined floodplain, one-dimensional routing is no longer a valid assumption. Geographic regions with flat to mild slopes, areas of depressed terrain, poorly defined flow paths, alluvial fans, and fluvial areas typically exhibit unconfined floodplains whereby floodwaters are not contained within a well-defined floodplain and generally flow in multiple directions, often with frequently diverging and converging flows. Unconfined floodplains are highly unpredictable and can exhibit both deep and shallow flooding with significant lateral differences in water surface elevations. Unconfined floodplains are found in areas ranging from flat swampy areas and coastal regions to mountain valleys."<ref name ="FEMA"/>

	“In flat areas, the results of a dam break are likely to be largely influenced by the location of the breach because the flat terrain has the potential to allow dam break floodwaters to flow in many directions without being confined to a river valley.		“In flat areas, the results of a dam break are likely to be largely influenced by the location of the breach because the flat terrain has the potential to allow dam break floodwaters to flow in many directions without being confined to a river valley."<ref name ="FEMA"/>

	“Areas below a dam may exhibit both confined and unconfined floodplains. An example of this would be a dam located along a mountain river that flows out into a large valley via an alluvial fan. The mountain river may exhibit a steep, deeply entrenched confined floodplain until it reaches the alluvial fan upon which the slope of the river decreases suddenly and becomes a very unpredictable unconfined floodplain as it diverges and spreads out across a wide alluvial fan and continues into a wide fluvial floodplain”. <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| FEMA P-946 Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013]]</~~ref~~>		“Areas below a dam may exhibit both confined and unconfined floodplains. An example of this would be a dam located along a mountain river that flows out into a large valley via an alluvial fan. The mountain river may exhibit a steep, deeply entrenched confined floodplain until it reaches the alluvial fan upon which the slope of the river decreases suddenly and becomes a very unpredictable unconfined floodplain as it diverges and spreads out across a wide alluvial fan and continues into a wide fluvial floodplain”."<ref name ="FEMA"/>

	==Best Practices Resources==		==Best Practices Resources==

Grichards at 02:20, 18 November 2022

2022-11-18T02:20:41Z

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	__NOTOC__		__NOTOC__
			[[Category:Hydraulics]]
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Grichards at 05:15, 17 September 2022

2022-09-17T05:15:47Z

← Older revision		Revision as of 05:15, 17 September 2022
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	“Areas below a dam may exhibit both confined and unconfined floodplains. An example of this would be a dam located along a mountain river that flows out into a large valley via an alluvial fan. The mountain river may exhibit a steep, deeply entrenched confined floodplain until it reaches the alluvial fan upon which the slope of the river decreases suddenly and becomes a very unpredictable unconfined floodplain as it diverges and spreads out across a wide alluvial fan and continues into a wide fluvial floodplain”. <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| FEMA P-946 Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013]]</ref>		“Areas below a dam may exhibit both confined and unconfined floodplains. An example of this would be a dam located along a mountain river that flows out into a large valley via an alluvial fan. The mountain river may exhibit a steep, deeply entrenched confined floodplain until it reaches the alluvial fan upon which the slope of the river decreases suddenly and becomes a very unpredictable unconfined floodplain as it diverges and spreads out across a wide alluvial fan and continues into a wide fluvial floodplain”. <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) \| FEMA P-946 Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013]]</ref>

	~~==Examples==~~
	~~{{Website Icon}}~~
	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946)]]		{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946)\|Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) (Federal Emergency Management Agency)]]
	~~==Trainings==~~
	~~{{Video Icon}}~~

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Cort at 20:27, 13 September 2022

2022-09-13T20:27:31Z

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	HEC-RAS is a program commonly used to generate one-dimensional hydraulic models (Hydrologic Engineering Center - USACE)		HEC-RAS is a program commonly used to generate one-dimensional hydraulic models ([https://www.hec.usace.army.mil/ Hydrologic Engineering Center, USACE])
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Cort at 14:38, 13 September 2022

2022-09-13T14:38:05Z

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			HEC-RAS is a program commonly used to generate one-dimensional hydraulic models (Hydrologic Engineering Center - USACE)
			}}

	“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream...		“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream...

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	{{Website Icon}}		{{Website Icon}}
	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}}		{{Document Icon}} [[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946)]]
	==Trainings==		==Trainings==
	{{Video Icon}}		{{Video Icon}}

Cort: Created page with "NOTOC ---- “One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave m..."

2022-09-12T20:21:19Z

Created page with "__NOTOC__ ----  “One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave m..."

New page

__NOTOC__
----

“One-dimensional models solve either fully dynamic or simplified forms of conservative or non-conservative forms of one-dimensional, cross-section-averaged shallow water equations. One-dimensional models provide reliable results for many situations; however, one-dimensional models in unconfined floodplains do not accurately represent the breach flood wave moving downstream...

One dimensional models are best suited to geographic regions with moderate to steep slopes whereby floodwaters are contained within a relatively narrow floodplain and generally flow in the direction of a single stream line without major or frequent divergence of flow. Confined floodplains are found in most parts of the United States and can range from deep entrenched rivers located within mountain ranges to wide coastal plain rivers. Confined floodplains typically present the engineer with a one-dimensional problem for which the one-dimensional assumption of many hydraulic models can yield meaningful results.

“One-dimensional models only provide a depth and discharge at computational cross-sections along the river. Although this process may be appropriate for confined alluvial floodplains/channels, errors in the unsteady simulation may be introduced in unconfined flat areas.

“When a flood wave enters an unconfined floodplain, one-dimensional routing is no longer a valid assumption. Geographic regions with flat to mild slopes, areas of depressed terrain, poorly defined flow paths, alluvial fans, and fluvial areas typically exhibit unconfined floodplains whereby floodwaters are not contained within a well-defined floodplain and generally flow in multiple directions, often with frequently diverging and converging flows. Unconfined floodplains are highly unpredictable and can exhibit both deep and shallow flooding with significant lateral differences in water surface elevations. Unconfined floodplains are found in areas ranging from flay swampy areas and coastal regions to mountain valleys.

“In flat areas, the results of a dam break are likely to be largely influenced by the location of the breach because the flat terrain has the potential to allow dam break floodwaters to flow in many directions without being confined to a river valley.

“Areas below a dam may exhibit both confined and unconfined floodplains. An example of this would be a dam located along a mountain river that flows out into a large valley via an alluvial fan. The mountain river may exhibit a steep, deeply entrenched confined floodplain until it reaches the alluvial fan upon which the slope of the river decreases suddenly and becomes a very unpredictable unconfined floodplain as it diverges and spreads out across a wide alluvial fan and continues into a wide fluvial floodplain”. <ref name ="FEMA">[[Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946) | FEMA P-946 Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures, FEMA, 2013]]</ref>

==Examples==
{{Website Icon}}
==Best Practices Resources==
{{Document Icon}}
==Trainings==
{{Video Icon}}


{{Citations}}


{{revhistinf}}