Vegetative Cover - Revision history

Grichards@gfnet.com at 21:29, 28 March 2024

2024-03-28T21:29:24Z

← Older revision		Revision as of 21:29, 28 March 2024
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	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->

	"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective [[benefits]]. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of [[Overtopping Protection\|overtopping protection]], but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015), FEMA, 2014]]</ref>		"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective benefits. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of [[Overtopping Protection\|overtopping protection]], but maintenance costs can be higher. An advantage of vegetative [[Overtopping Protection\|overtopping protection]] systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015), FEMA, 2014]]</ref>

	"Vegetation provides protection to an embankment in two ways:		"Vegetation provides protection to an embankment in two ways:

Rmanwaring at 00:22, 14 December 2022

2022-12-14T00:22:30Z

← Older revision		Revision as of 00:22, 14 December 2022
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	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->

	"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective [[benefits]]. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of overtopping protection, but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015), FEMA, 2014]]</ref>		"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective [[benefits]]. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of [[Overtopping Protection\|overtopping protection]], but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015), FEMA, 2014]]</ref>

	"Vegetation provides protection to an embankment in two ways:		"Vegetation provides protection to an embankment in two ways:
	#Protection of the soil surface by reduction of velocities and shear stresses at the embankment boundary as a result of the coverage provided by stems and leaves that lay down in the flow and blanket the surface.		#Protection of the soil surface by reduction of velocities and shear stresses at the embankment boundary as a result of the coverage provided by stems and leaves that lay down in the flow and blanket the surface.
	#Reinforcement of the underlying soil due to the presence of plant roots.		#Reinforcement of the underlying soil due to the presence of plant roots." <ref name="FEMA1015" />


	"The reinforcement aspect may be further improved by the use of turf reinforcement mats that can improve root mass continuity following full vegetation establishment." <ref name="FEMA1015" />		"The reinforcement aspect may be further improved by the use of [[Turf Reinforcement Mats\|turf reinforcement mats]] that can improve root mass continuity following full vegetation establishment." <ref name="FEMA1015" />

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Rmanwaring at 00:21, 14 December 2022

2022-12-14T00:21:33Z

← Older revision		Revision as of 00:21, 14 December 2022
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	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->

	"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective benefits. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of overtopping protection, but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015) ~~(Federal Emergency Management Agency~~, 2014)]]</ref>		"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective [[benefits]]. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of overtopping protection, but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015), FEMA, 2014]]</ref>

	"Vegetation provides protection to an embankment in two ways:		"Vegetation provides protection to an embankment in two ways:

Grichards at 20:45, 2 December 2022

2022-12-02T20:45:08Z

← Older revision		Revision as of 20:45, 2 December 2022
Line 6:		Line 6:
	<!-- Introductory paragraph or topic page summary -->		<!-- Introductory paragraph or topic page summary -->

	"Vegetative cover maintained on the downstream faces of embankment dams provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an overtopping protection method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective benefits. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of overtopping protection, but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015) (Federal Emergency Management Agency, 2014)]]</ref>		"Vegetative cover maintained on the downstream faces of [[Embankment Dams\|embankment dams]] provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an [[Overtopping Protection\|overtopping protection]] method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective benefits. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of overtopping protection, but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)\| Technical Manual: Overtopping Protection for Dams (FEMA P-1015) (Federal Emergency Management Agency, 2014)]]</ref>

	"Vegetation provides protection to an embankment in two ways:		"Vegetation provides protection to an embankment in two ways:
	#Protection of the soil surface by reduction of velocities and shear stresses at the embankment boundary as a result of the coverage provided by stems and leaves that lay down in the flow and blanket the surface.		#Protection of the soil surface by reduction of velocities and shear stresses at the embankment boundary as a result of the coverage provided by stems and leaves that lay down in the flow and blanket the surface.
	#Reinforcement of the underlying soil due to the presence of plant roots.		#Reinforcement of the underlying soil due to the presence of plant roots.


	"The reinforcement aspect may be further improved by the use of turf reinforcement mats that can improve root mass continuity following full vegetation establishment." <ref name="FEMA1015" />		"The reinforcement aspect may be further improved by the use of turf reinforcement mats that can improve root mass continuity following full vegetation establishment." <ref name="FEMA1015" />

Grichards: Created page with "NOTOC Category:Overtopping Protection ---- "Vegetative cover maintained on the downstream faces of embankment dams provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can..."

2022-12-02T20:44:39Z

Created page with "__NOTOC__  Category:Overtopping Protection ----  "Vegetative cover maintained on the downstream faces of embankment dams provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can..."

New page

__NOTOC__

[[Category:Overtopping Protection]]
----



"Vegetative cover maintained on the downstream faces of embankment dams provides some protection against normal weathering effects and rill development due to rainfall. During small overtopping flows of short duration, vegetation can also provide protection against the initiation of concentrated erosion that can otherwise lead to headcut development and dam breach, and may allow for the planned use of the embankment to convey a portion of a flood hydrograph. For larger flow rates and/or for longer overtopping durations, vegetation alone may not fully protect against failure, but vegetation may delay breaching sufficiently to permit evacuation of downstream areas. Vegetative cover is most viable as an overtopping protection method for small dams in humid climates that receive sufficient moisture to establish relatively dense, uniform turf grasses. Good maintenance of the grass cover is essential to achieve significant protective benefits. Grass needs to be cut relatively short on the downstream face of an embankment dam (between 2 and 6 inches) to facilitate visual [[inspections]] and to promote uniformity of growth. Vegetative cover is generally not suitable for very steep embankments because of the difficulty of mowing and other maintenance required to achieve a uniform cover. Installation costs for vegetation are often lower than for other forms of overtopping protection, but maintenance costs can be higher. An advantage of vegetative overtopping protection systems, where applicable for use, is the potential for unlimited sustainability via annual growth and renewal, if proper maintenance can be achieved." <ref name="FEMA1015">[[Technical Manual: Overtopping Protection for Dams (FEMA P-1015)| Technical Manual: Overtopping Protection for Dams (FEMA P-1015) (Federal Emergency Management Agency, 2014)]]</ref>

"Vegetation provides protection to an embankment in two ways:
#Protection of the soil surface by reduction of velocities and shear stresses at the embankment boundary as a result of the coverage provided by stems and leaves that lay down in the flow and blanket the surface.
#Reinforcement of the underlying soil due to the presence of plant roots.

"The reinforcement aspect may be further improved by the use of turf reinforcement mats that can improve root mass continuity following full vegetation establishment." <ref name="FEMA1015" />


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