Case study:Ravensbourne/Pool confluence weir bypass channel - Revision history

Alexrrc at 11:01, 5 June 2017

2017-06-05T11:01:57Z

← Older revision		Revision as of 11:01, 5 June 2017
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	}}		}}
	{{Measures		{{Measures
	\|Planform / Channel pattern=Bypass ~~cahnnel improvement~~		\|Planform / Channel pattern=Bypass channel,
	}}		}}
	{{Hydromorphological_quality_elements_header}}		{{Hydromorphological_quality_elements_header}}

2015-10-27T12:31:24Z

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 {{Site
-|Name=
+|WFD water body code=GB106039023270
+|WFD water body name=Ravensbourne (Catford to Deptford)
+|Heavily modified water body=No
+|Protected species present=No
-|WFD water body code=
+|Invasive species present=No
 }}
 {{Project background

2014-04-25T11:36:35Z

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 {{Measures
-|Bank and bed modifications measure=
+|Planform / Channel pattern=Bypass cahnnel improvement
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 {{Hydromorphological_quality_elements_header}}

2014-04-25T11:36:23Z

← Older revision		Revision as of 11:36, 25 April 2014
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	{{Motivations		{{Motivations
	\|~~Hydromorphological quality elements~~=		\|Specific mitigation=Barriers to fish migration
			\|Biological quality elements=Fish


	\|Biological quality elements=

	~~\|Physico-chemical quality elements=~~

	~~\|Specific mitigation=~~

	~~\|Other motivation=~~

	}}		}}
	{{Measures		{{Measures

2014-04-10T13:41:18Z

← Older revision		Revision as of 13:41, 10 April 2014
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	\|Multi-site=No		\|Multi-site=No
	\|Project summary=The existing bypass channel does not function. Requires a redesign to push more flow through it and to make it more attractive to fish. This structure just upstream of the confluence of the Ravensbourne with the Pool River. It is a sloping-back weir with a head loss of about 437 mm. Some eel passage is likely to be possible at low flows, however it is likely to be a significant barrier to fish passage.		\|Project summary=The existing bypass channel does not function. Requires a redesign to push more flow through it and to make it more attractive to fish. This structure just upstream of the confluence of the Ravensbourne with the Pool River. It is a sloping-back weir with a head loss of about 437 mm. Some eel passage is likely to be possible at low flows, however it is likely to be a significant barrier to fish passage.
			\|Lessons learn=August 2012 update - Confluence bypass channel is not complete, due to the presence of Japanese Knotweed the project could not be totally completed, a deflector was put in and the channel dug but it is not working. In base of visit in August: the channel is dry.
	}}		}}
	{{Image_gallery}}		{{Image_gallery}}

2014-04-10T11:41:29Z

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	{{Toggle_content_start}}		{{Toggle_content_start}}
	{{~~Case_study_subcatchment~~		{{Case study subcatchment
	\|Subcatchment=		\|Subcatchment=Ravensbourne (Catford to Deptford)







	}}		}}
	{{Site		{{Site

2014-04-10T10:43:21Z

← Older revision		Revision as of 10:43, 10 April 2014
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	\|Works completed=2012/01/01		\|Works completed=2012/01/01
	\|Total cost category=10 - 50 k€		\|Total cost category=10 - 50 k€
			\|Funding sources=Defra WFD funded
	}}		}}
	{{Motivations		{{Motivations

2014-04-10T10:16:58Z

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-{{Project_background
+{{Project background
-|Reach length directly affected=
+|Reach length directly affected=10 m
 |Project started=2012/01/01
 |Works completed=2012/01/01
-m
+|Total cost category=10 - 50 k€
 }}
 {{Motivations

2014-04-09T16:06:50Z

2014-04-09T12:43:26Z

← Older revision		Revision as of 12:43, 9 April 2014
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	\|Main contact surname=Gray		\|Main contact surname=Gray
	\|Contact organisation=Environment Agency		\|Contact organisation=Environment Agency
			\|Contact organisation url=www.gov.uk/government/organisations/environment-agency
	\|Multi-site=No		\|Multi-site=No
	\|Project summary=The existing bypass channel does not function. Requires a redesign to push more flow through it and to make it more attractive to fish. This structure just upstream of the confluence of the Ravensbourne with the Pool River. It is a sloping-back weir with a head loss of about 437 mm. Some eel passage is likely to be possible at low flows, however it is likely to be a significant barrier to fish passage.		\|Project summary=The existing bypass channel does not function. Requires a redesign to push more flow through it and to make it more attractive to fish. This structure just upstream of the confluence of the Ravensbourne with the Pool River. It is a sloping-back weir with a head loss of about 437 mm. Some eel passage is likely to be possible at low flows, however it is likely to be a significant barrier to fish passage.