Case study:Seven Hatches - Revision history

Ascarr at 10:20, 23 August 2017

2017-08-23T10:20:53Z

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	{{Project overview		{{Project overview
	\|Status=Complete		\|Status=Complete
	\|Project web site url=~~http://~~webarchive.nationalarchives.gov.uk/20110303155229/http://www.streamlife.org.uk/actions/river_restoration/		\|Project web site url=webarchive.nationalarchives.gov.uk/20110303155229/http://www.streamlife.org.uk/actions/river_restoration/
	\|Themes=Fisheries, Habitat and biodiversity		\|Themes=Fisheries, Habitat and biodiversity
	\|Country=England		\|Country=England

Alexrrc at 11:00, 4 August 2017

2017-08-04T11:00:18Z

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	\|Contact organisation=Natural England		\|Contact organisation=Natural England
	\|Contact organisation url=www.naturalengland.org.uk/		\|Contact organisation url=www.naturalengland.org.uk/
	\|Partner organisations=Environment Agency, Wiltshire Wildlife Trust, Hampshire & Isle of Wight Wildlife Trust, Wessex Water, River Restoration Centre,		\|Partner organisations=Environment Agency, Wiltshire Wildlife Trust, Hampshire & Isle of Wight Wildlife Trust, Wessex Water, River Restoration Centre,
	\|Multi-site=No		\|Multi-site=No
	\|Project picture=Seven hatches.jpg		\|Project picture=Seven hatches.jpg
	\|Project summary=~~==summary==~~		\|Project summary=The River Wylye was historically dredged at Seven hatches and is over sized compared to flow. In the top part of the site, large hatches used to control flow between channels results in slow flows. Below the hatches major dredging combined with the presence of various structures downstream means the channel has no slope, little or no flow speed in summer and heavy siltation. The object of the work is to modify the channel to a more appropriate width, shape and slope, and to re-introduce woody debris resulting in increased and varied low speed and sediment movement. The works were understaken with the parterns listed above and the local stakeholders where the local landowners, tenant farmers and the fishing clubs that owned the fishing rights.
	The River Wylye was historically dredged at Seven hatches and is over sized compared to flow. In the top part of the site, large hatches used to control flow between channels results in slow flows. Below the hatches major dredging combined with the presence of various structures downstream means the channel has no slope, little or no flow speed in summer and heavy siltation. The object of the work is to modify the channel to a more appropriate width, shape and slope, and to re-introduce woody debris resulting in increased and varied low speed and sediment movement. The works were understaken with the parterns listed above and the local stakeholders where the local landowners, tenant farmers and the fishing clubs that owned the fishing rights.

	The work was completed in November 2007 and involved:		The work was completed in November 2007 and involved:
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	During the planning phase, the public was informed via public meetings and press releases in the newspapers and magazines. The stakeholders had to accept the concept design in the project bid and during the project there was constant contact with the stakeholders. Concerns or criticisms were investigated and the project changed when the criticisms were verified. At the end of the project a conference was held for all stakeholders and general public to show them the end results of the project in their area.		During the planning phase, the public was informed via public meetings and press releases in the newspapers and magazines. The stakeholders had to accept the concept design in the project bid and during the project there was constant contact with the stakeholders. Concerns or criticisms were investigated and the project changed when the criticisms were verified. At the end of the project a conference was held for all stakeholders and general public to show them the end results of the project in their area.



	\|Monitoring surveys and results===Success Criteria==		\|Monitoring surveys and results===Success Criteria==

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	Separate from the LIFE project in Seven Hatches some invertebrate monitoring was conducted before and after the measures, but the results of this survey was not reported in the project reports.		Separate from the LIFE project in Seven Hatches some invertebrate monitoring was conducted before and after the measures, but the results of this survey was not reported in the project reports.


	\|Lessons learn===Expectations and Response==		\|Lessons learn===Expectations and Response==

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	The impact of the measures on socio-economic aspects like flood protection are not monitored and therefore unknown. The Hampshire Avon Catchment Flood Management Plan published in 2009 indicates that the area of Seven Hatches is on the border between the Salisbury area with policy 5, Areas of moderate to high flood risk where we can generally take further action to reduce flood risk, and the Upper Avon, Wylye sub area with policy 6, Areas of low to moderate flood risk where we will take action with others to store water or manage run-off in locations that provide overall flood risk reduction or environmental benefits. There are therefore still problems with flood protection that have to be addressed.		The impact of the measures on socio-economic aspects like flood protection are not monitored and therefore unknown. The Hampshire Avon Catchment Flood Management Plan published in 2009 indicates that the area of Seven Hatches is on the border between the Salisbury area with policy 5, Areas of moderate to high flood risk where we can generally take further action to reduce flood risk, and the Upper Avon, Wylye sub area with policy 6, Areas of low to moderate flood risk where we will take action with others to store water or manage run-off in locations that provide overall flood risk reduction or environmental benefits. There are therefore still problems with flood protection that have to be addressed.





	}}		}}
	{{Image gallery}}		{{Image gallery}}

Alexrrc at 12:49, 1 June 2017

2017-06-01T12:49:12Z

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	{{Motivations}}		{{Motivations}}
	{{Measures		{{Measures
	\|Bank and bed modifications measure=~~Recreate gravel~~ bar ~~and riffles~~, ~~Introducing sediment~~,		\|Bank and bed modifications measure=Introducing sediment, Gravel bar, Riffle creation,
	\|Floodplain / River corridor=Develop riparian forest, Protect/restore riparian zone,		\|Floodplain / River corridor=Develop riparian forest, Protect/restore riparian zone,
	\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,		\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,

Alexrrc at 11:56, 1 June 2017

2017-06-01T11:56:12Z

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	{{Measures		{{Measures
	\|Bank and bed modifications measure=Recreate gravel bar and riffles, Introducing sediment,		\|Bank and bed modifications measure=Recreate gravel bar and riffles, Introducing sediment,
	\|Floodplain / River corridor=Develop riparian forest, ~~Revegetate~~ riparian ~~zones~~,		\|Floodplain / River corridor=Develop riparian forest, Protect/restore riparian zone,
	\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,		\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,
	}}		}}

Alexrrc at 11:16, 1 June 2017

2017-06-01T11:16:04Z

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	{{Motivations}}		{{Motivations}}
	{{Measures		{{Measures
	\|Bank and bed modifications measure=~~add sediment,~~ Recreate gravel bar and riffles		\|Bank and bed modifications measure=Recreate gravel bar and riffles, Introducing sediment,
	\|Floodplain / River corridor=Develop riparian forest, Revegetate riparian zones,		\|Floodplain / River corridor=Develop riparian forest, Revegetate riparian zones,
	\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,		\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,

Alexrrc at 08:01, 31 May 2017

2017-05-31T08:01:52Z

← Older revision		Revision as of 08:01, 31 May 2017
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	{{Measures		{{Measures
	\|Bank and bed modifications measure=add sediment, Recreate gravel bar and riffles		\|Bank and bed modifications measure=add sediment, Recreate gravel bar and riffles
	\|Floodplain / River corridor=Develop riparian forest, Revegetate riparian zones,		\|Floodplain / River corridor=Develop riparian forest, Revegetate riparian zones,
	\|Planform / Channel pattern=Channel narrowing, ~~Introducting~~ large woody debris,		\|Planform / Channel pattern=Channel narrowing, Introducing large woody debris,
	}}		}}
	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}

NickRRC at 13:56, 11 October 2013

2013-10-11T13:56:28Z

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	{{Case study status		{{Case study status
	\|Approval status=~~Draft~~		\|Approval status=Approved
	}}		}}
	{{Location		{{Location

Ascarr at 13:54, 10 October 2013

2013-10-10T13:54:14Z

← Older revision		Revision as of 13:54, 10 October 2013
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	{{Project background}}		{{Project background}}
	{{Motivations}}		{{Motivations}}
	{{Measures}}		{{Measures
			\|Bank and bed modifications measure=add sediment, Recreate gravel bar and riffles
			\|Floodplain / River corridor=Develop riparian forest, Revegetate riparian zones,
			\|Planform / Channel pattern=Channel narrowing, Introducting large woody debris,
			}}
	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}
	{{End table}}		{{End table}}

Ascarr at 13:51, 10 October 2013

2013-10-10T13:51:46Z

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	}}		}}
	{{Site		{{Site
			\|WFD water body code=GB108043022510
	\|WFD water body name=River Wylye		\|WFD water body name=River Wylye
	\|Heavily modified water body=No		\|Heavily modified water body=No

Ascarr at 13:50, 10 October 2013

2013-10-10T13:50:46Z

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	{{Toggle button}}		{{Toggle button}}
	{{Toggle content start}}		{{Toggle content start}}
	{{Case study subcatchment}}		{{Case study subcatchment
			\|Subcatchment=WYLYE (Lower)
			}}
	{{Site		{{Site
	\|WFD water body name=River Wylye		\|WFD water body name=River Wylye