Terrain Data - Revision history

Mpollei@gfnet.com at 19:05, 11 July 2023

2023-07-11T19:05:52Z

← Older revision		Revision as of 19:05, 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]]

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Rmanwaring at 21:04, 19 December 2022

2022-12-19T21:04:22Z

← Older revision		Revision as of 21:04, 19 December 2022
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	“Before performing an inundation study, available terrain sources should be carefully evaluated to identify the best-available data by considering numerous factors, including date, accuracy, and spatial extent of data to name a few. For instance, the selection of the level of detail and accuracy of the terrain data to be used for a dam breach study should consider the level of detail of the hydrologic and hydraulic modeling used for the study. A tier 1 simple and basic study, described in section 6.3 of this guidance document, covering a rural area does not warrant the same level of detailed terrain data as tier 2 intermediate or tier 3 advanced studies for heavily populated areas. Section 9 provides further discussion on terrain data and cross-section accuracy for use in dam breach studies.		“Before performing an inundation study, available terrain sources should be carefully evaluated to identify the best-available data by considering numerous factors, including date, accuracy, and spatial extent of data to name a few. For instance, the selection of the level of detail and accuracy of the terrain data to be used for a dam breach study should consider the level of detail of the hydrologic and hydraulic modeling used for the study. A tier 1 simple and basic study, described in section 6.3 of this guidance document, covering a rural area does not warrant the same level of detailed terrain data as tier 2 intermediate or tier 3 advanced studies for heavily populated areas. Section 9 provides further discussion on terrain data and cross-section accuracy for use in dam breach studies.

	“To achieve a suitable level of accuracy, it may be necessary to combine multiple terrain datasets to ensure that either the best available or an acceptable accuracy terrain data source is utilized throughout the spatial extent of the inundation. When combining terrain datasets, edge matching must be carefully reviewed to ensure that no artificial walls or drops are inadvertently created during the merge. Combined datasets must also use consistent horizontal and vertical datum and units” <ref name ="FEMA P-946">[[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>.		“To achieve a suitable level of accuracy, it may be necessary to combine multiple terrain datasets to ensure that either the best available or an acceptable accuracy terrain data source is utilized throughout the spatial extent of the inundation. When combining terrain datasets, edge matching must be carefully reviewed to ensure that no artificial walls or drops are inadvertently created during the merge. Combined datasets must also use consistent horizontal and vertical datum and units” <ref name ="FEMA P-946">[[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>.

	==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 05:10, 18 November 2022

2022-11-18T05:10:20Z

← Older revision		Revision as of 05:10, 18 November 2022
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	__NOTOC__		__NOTOC__
			[[Category:Dam Breach Inundation Analysis]]
	----		----
	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	“The USDOI in its report Inundation Mapping/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more detailed definition of drainage paths, which creates a need for more accurate terrain data.		“The USDOI in its report [[Inundation Mapping]]/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more detailed definition of drainage paths, which creates a need for more accurate terrain data.

	“Before performing an inundation study, available terrain sources should be carefully evaluated to identify the best-available data by considering numerous factors, including date, accuracy, and spatial extent of data to name a few. For instance, the selection of the level of detail and accuracy of the terrain data to be used for a dam breach study should consider the level of detail of the hydrologic and hydraulic modeling used for the study. A tier 1 simple and basic study, described in section 6.3 of this guidance document, covering a rural area does not warrant the same level of detailed terrain data as tier 2 intermediate or tier 3 advanced studies for heavily populated areas. Section 9 provides further discussion on terrain data and cross-section accuracy for use in dam breach studies.		“Before performing an inundation study, available terrain sources should be carefully evaluated to identify the best-available data by considering numerous factors, including date, accuracy, and spatial extent of data to name a few. For instance, the selection of the level of detail and accuracy of the terrain data to be used for a dam breach study should consider the level of detail of the hydrologic and hydraulic modeling used for the study. A tier 1 simple and basic study, described in section 6.3 of this guidance document, covering a rural area does not warrant the same level of detailed terrain data as tier 2 intermediate or tier 3 advanced studies for heavily populated areas. Section 9 provides further discussion on terrain data and cross-section accuracy for use in dam breach studies.

Grichards at 04:22, 17 September 2022

2022-09-17T04:22:11Z

← Older revision		Revision as of 04:22, 17 September 2022
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	“To achieve a suitable level of accuracy, it may be necessary to combine multiple terrain datasets to ensure that either the best available or an acceptable accuracy terrain data source is utilized throughout the spatial extent of the inundation. When combining terrain datasets, edge matching must be carefully reviewed to ensure that no artificial walls or drops are inadvertently created during the merge. Combined datasets must also use consistent horizontal and vertical datum and units” <ref name ="FEMA P-946">[[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>.		“To achieve a suitable level of accuracy, it may be necessary to combine multiple terrain datasets to ensure that either the best available or an acceptable accuracy terrain data source is utilized throughout the spatial extent of the inundation. When combining terrain datasets, edge matching must be carefully reviewed to ensure that no artificial walls or drops are inadvertently created during the merge. Combined datasets must also use consistent horizontal and vertical datum and units” <ref name ="FEMA P-946">[[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 19:48, 15 September 2022

2022-09-15T19:48:18Z

← Older revision		Revision as of 19:48, 15 September 2022
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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 at 19:26, 12 September 2022

2022-09-12T19:26:01Z

← Older revision		Revision as of 19:26, 12 September 2022
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	~~[Page Summary]~~

	“The USDOI in its report Inundation Mapping/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more detailed definition of drainage paths, which creates a need for more accurate terrain data.		“The USDOI in its report Inundation Mapping/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more detailed definition of drainage paths, which creates a need for more accurate terrain data.

Pcampana: Created page with "NOTOC ---- [Page Summary] “The USDOI in its report Inundation Mapping/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more d..."

2022-09-11T15:20:35Z

Created page with "__NOTOC__ ----  [Page Summary] “The USDOI in its report Inundation Mapping/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more d..."

New page

__NOTOC__
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[Page Summary]

“The USDOI in its report Inundation Mapping/Modeling Subproject Report, Implementation Phase 1: Launch Risk Reduction, dated March 2011, recommends that as a general rule, larger dam breach flows, in terms of peak breach discharge and volume, do not require as detailed terrain data as would smaller flows. Smaller flood flow requires a more detailed definition of drainage paths, which creates a need for more accurate terrain data.

“Before performing an inundation study, available terrain sources should be carefully evaluated to identify the best-available data by considering numerous factors, including date, accuracy, and spatial extent of data to name a few. For instance, the selection of the level of detail and accuracy of the terrain data to be used for a dam breach study should consider the level of detail of the hydrologic and hydraulic modeling used for the study. A tier 1 simple and basic study, described in section 6.3 of this guidance document, covering a rural area does not warrant the same level of detailed terrain data as tier 2 intermediate or tier 3 advanced studies for heavily populated areas. Section 9 provides further discussion on terrain data and cross-section accuracy for use in dam breach studies.

“To achieve a suitable level of accuracy, it may be necessary to combine multiple terrain datasets to ensure that either the best available or an acceptable accuracy terrain data source is utilized throughout the spatial extent of the inundation. When combining terrain datasets, edge matching must be carefully reviewed to ensure that no artificial walls or drops are inadvertently created during the merge. Combined datasets must also use consistent horizontal and vertical datum and units” <ref name ="FEMA P-946">[[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}}