Reach Routing - Revision history

Mpollei@gfnet.com at 04:43, 21 July 2023

2023-07-21T04:43:34Z

← Older revision		Revision as of 04:43, 21 July 2023
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units \| National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units, NRCS~~, 2015~~]]		{{Document Icon}} [[National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units \| National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units, NRCS]]
	{{Document Icon}} [[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS~~, 2014~~]]		{{Document Icon}} [[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS]]
	{{Document Icon}} [[Flood Hydrology Manual \| Flood Hydrology Manual, USBR~~, 1989~~]]		{{Document Icon}} [[Flood Hydrology Manual \| Flood Hydrology Manual, USBR]]

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Rmanwaring at 20:15, 19 December 2022

2022-12-19T20:15:15Z

← Older revision		Revision as of 20:15, 19 December 2022
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units \| National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units ~~(Natural Resources Conservation Service)~~]]		{{Document Icon}} [[National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units \| National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units, NRCS, 2015]]
	{{Document Icon}} [[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing ~~(Natural Resources Conservation Service)~~]]		{{Document Icon}} [[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS, 2014]]
	{{Document Icon}} [[Flood Hydrology Manual \| Flood Hydrology Manual ~~(Bureau of Reclamation)~~]]		{{Document Icon}} [[Flood Hydrology Manual \| Flood Hydrology Manual, USBR, 1989]]

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Grichards at 03:36, 13 December 2022

2022-12-13T03:36:51Z

← Older revision		Revision as of 03:36, 13 December 2022
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	----		----
	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->
			Reach routing is the process of hydraulically routing runoff hydrographs from subwatersheds through various downstream subwatersheds to the watershed outlet or other point of interest.

	“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only [[floodplain]] length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS, 2014]]</ref>		“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only [[floodplain]] length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS, 2014]]</ref>

Grichards at 02:51, 13 December 2022

2022-12-13T02:51:26Z

← Older revision		Revision as of 02:51, 13 December 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 -->
	__NOTOC__		__NOTOC__
			[[Category:Rainfall Runoff Modeling]]
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	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->
	“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only floodplain length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS, 2014]]</ref>		“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only [[floodplain]] length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS, 2014]]</ref>

	“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17"/>		“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17"/>

Rmanwaring at 19:39, 21 October 2022

2022-10-21T19:39:23Z

← Older revision		Revision as of 19:39, 21 October 2022
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	----		----
	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->
	“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only floodplain length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[~~Hydrology~~ National Engineering Handbook: Chapter 17- Flood Routing \| ~~Hydrology~~ National Engineering Handbook: Chapter 17- Flood Routing, NRCS, 2014]]</ref>		“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only floodplain length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing, NRCS, 2014]]</ref>

	“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17"/>		“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17"/>

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[~~Hydrology~~ National Engineering Handbook: Chapter 6- Stream Reaches and Hydrologic Units\|National Engineering Handbook: Chapter 6- Stream Reaches and Hydrologic Units (Natural Resources Conservation Service)]]		{{Document Icon}} [[National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units \| National Engineering Handbook: Chapter 6 - Stream Reaches and Hydrologic Units (Natural Resources Conservation Service)]]
	{{Document Icon}} [[~~Hydrology~~ National Engineering Handbook: Chapter 17- Flood Routing\|National Engineering Handbook: Chapter 17- Flood Routing (Natural Resources Conservation Service)]]		{{Document Icon}} [[National Engineering Handbook: Chapter 17 - Flood Routing \| National Engineering Handbook: Chapter 17 - Flood Routing (Natural Resources Conservation Service)]]
	{{Document Icon}} [[Flood Hydrology Manual\|Flood Hydrology Manual (Bureau of Reclamation)]]		{{Document Icon}} [[Flood Hydrology Manual \| Flood Hydrology Manual (Bureau of Reclamation)]]

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Grichards at 01:09, 17 September 2022

2022-09-17T01:09:31Z

← Older revision		Revision as of 01:09, 17 September 2022
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	“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only floodplain length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[Hydrology National Engineering Handbook: Chapter 17- Flood Routing \| Hydrology National Engineering Handbook: Chapter 17- Flood Routing, NRCS, 2014]]</ref>		“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only floodplain length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[Hydrology National Engineering Handbook: Chapter 17- Flood Routing \| Hydrology National Engineering Handbook: Chapter 17- Flood Routing, NRCS, 2014]]</ref>

	“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17">		“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17"/>

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

Grichards: Created page with " NOTOC ---- “Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the eng..."

2022-09-17T01:08:54Z

Created page with " __NOTOC__ ----  “Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the eng..."

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“Two important judgements are needed by the engineer when developing data for channel reach routing. One is the selection of a representative cross section. This cross section should represent an average flow velocity through the reach. If there are several cross sections available for selection, the engineer should select the section most typical of the reach conditions. The second important judgement is the selection of a reach length. To properly represent reach storage characteristics, the reach length should be an average length of the routing reach. HEC-RAS allows for left overbank, right overbank, and channel reach lengths. WinTR-20 allows for only floodplain length and channel length. WinTR-55 is limited to only a single channel length”.<ref name="NEH210-630-17">[[Hydrology National Engineering Handbook: Chapter 17- Flood Routing | Hydrology National Engineering Handbook: Chapter 17- Flood Routing, NRCS, 2014]]</ref>

“Storage in a reach is often underestimated because backwater storage in tributaries is usually not considered in developing water surface profiles using HEC-RAS. If this type of storage is significant, it should be estimated. The simplest way to account for this would be to increase the floodplain length. A more complex analysis would involve adjusting HEC-RAS cross sections to include an ineffective flow area for tributary backwater”. <ref name="NEH210-630-17">

==Best Practices Resources==
{{Document Icon}} [[Hydrology National Engineering Handbook: Chapter 6- Stream Reaches and Hydrologic Units|National Engineering Handbook: Chapter 6- Stream Reaches and Hydrologic Units (Natural Resources Conservation Service)]]
{{Document Icon}} [[Hydrology National Engineering Handbook: Chapter 17- Flood Routing|National Engineering Handbook: Chapter 17- Flood Routing (Natural Resources Conservation Service)]]
{{Document Icon}} [[Flood Hydrology Manual|Flood Hydrology Manual (Bureau of Reclamation)]]


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