Fishways for eels and lampreys - Revision history

Bendikhansen: Text replacement - "category:Measures" to "category:Solutions"

2020-10-26T10:02:01Z

Text replacement - "category:Measures" to "category:Solutions"

Bendikhansen: /* Relevant literature */

2020-09-30T19:45:19Z

Relevant literature

Bendikhansen at 12:09, 6 April 2020

2020-04-06T12:09:35Z

Bendikhansen at 14:24, 5 April 2020

2020-04-05T14:24:36Z

Bendikhansen at 12:43, 12 March 2020

2020-03-12T12:43:06Z

Bendikhansen: Text replacement - "=Useful MTDs=" to "=Relevant MTDs and test cases="

2020-01-21T14:21:54Z

Text replacement - "=Useful MTDs=" to "=Relevant MTDs and test cases="

Bendikhansen at 14:09, 20 January 2020

2020-01-20T14:09:12Z

Bendikhansen: /* Classification table */

2019-10-28T10:34:40Z

Classification table

Bendikhansen: /* Classification table */

2019-10-17T08:26:02Z

Classification table

Show changes

Bendikhansen at 12:47, 10 October 2019

2019-10-10T12:47:04Z

← Older revision		Revision as of 10:02, 26 October 2020
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	*Environment Agency, UK. 2017. Elver and Eel Passes. A Guide to the Design and Implementation of Passage Solutions at Weirs, Tidal Gates and Sluices. Updated version 10/2017.https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/297338/geho0411btqc-e-e.pdf.		*Environment Agency, UK. 2017. Elver and Eel Passes. A Guide to the Design and Implementation of Passage Solutions at Weirs, Tidal Gates and Sluices. Updated version 10/2017.https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/297338/geho0411btqc-e-e.pdf.

−	[[category:Upstream fish migration measures]][[category:~~Measures~~]]	+	[[category:Upstream fish migration measures]][[category:Solutions]]

← Older revision		Revision as of 19:45, 30 September 2020
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	=Relevant literature=		=Relevant literature=
		+	*Armstrong, G., Aprahamian, M., Fewings, G., Gough, P., Reader, N. and Varallo, P. (2010). Environment agency fish pass manual. Environment Agency, Bristol, UK.
		+	*DWA - Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall. 2014. Merkblatt M-509: Fischaufstiegsanlagen und fischpassierbare Bauwerke ‒Gestaltung, Bemessung, Qualitätssicherung. Hennef, 334 pp.
		+	*Environment Agency, UK. 2011. Screening at intakes and outfalls: measures to protect eel. s.l. : (www.environment-agency.gov.uk)., 2011. p. 129.
		+	*Environment Agency, UK. 2017. Elver and Eel Passes. A Guide to the Design and Implementation of Passage Solutions at Weirs, Tidal Gates and Sluices. Updated version 10/2017.https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/297338/geho0411btqc-e-e.pdf.

	[[category:Upstream fish migration measures]][[category:Measures]]		[[category:Upstream fish migration measures]][[category:Measures]]

← Older revision		Revision as of 12:09, 6 April 2020
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		+	[[file:icon_upstream.png\|right\|150px\|link=[[Upstream fish migration]]]]
	=Introduction=		=Introduction=
	[[file:eels_pass_france.png\|thumb\|250px\|Figure 1: Eel pass at a hydropower plant in France. Here, migrant glass eels are led to a ramp filled with "artificial turf" and water.]]		[[file:eels_pass_france.png\|thumb\|250px\|Figure 1: Eel pass at a hydropower plant in France. Here, migrant glass eels are led to a ramp filled with "artificial turf" and water.]]

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 =Introduction=
-[[file:eels_pass_france.png|thumb|500px|Figure 1: Eel pass at a hydropower plant in France. Here, migrant glass eels are led to a ramp filled with "artificial turf" and water.]]
+[[file:eels_pass_france.png|thumb|250px|Figure 1: Eel pass at a hydropower plant in France. Here, migrant glass eels are led to a ramp filled with "artificial turf" and water.]]
 Depending on the life stage and the passage design, eel and lamprey can use the migration solutions mentioned above, apart from traditional pool-type fishways without vertical slots. Eel and lamprey can pass natural-type ramps and bypasses in the same way as they do in similar river reaches in nature. It is then important that the passages also have a natural-type layout of the banks, with vegetation, and a rough, varied substrate, and no slippery walls. Yellow eels and silver eels can swim upstream along the bottom of vertical slot fishways, if there is continuous rough bottom substrate. In pool type fishways without such slots, Lamprey and eels can still migrate if there are bottom cuts or orifices and lamprey even climb across surface notches. These should have a brush structure on at least one side, so that smaller yellow eels can crawl through. However, the youngest stages, (<8 cm, glass eel and small yellow eel) require another type of passage, since their behavior differs from older eels. Glass needle migrate near the surface and can only cause low water speeds. However, they can pass obstacles by ebbing themselves through substrates and terrain, even outside the river, as long as the bank surface is moist and rough enough, for example, on moss-clad rocks. In order to imitate such conditions, specially designed eel passes have been developed. These consist of a channel with brushes, artificial turf or other structures with continuous voids that are kept moist (Armstrong et al. 2010, Environment Agency 2011 and DWA 2014). More details for the design of eel passages can be found in (Environment Agency 2011 and 2017).

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 =Classification table=
 {{Fishways for eels and lampreys}}
 [[category:Upstream fish migration measures]][[category:Measures]]

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 Lamprey and eel fishways are typically in use only parts of the year and requires that their operation is started and stopped at certain dates. Injuries on such fishways from physical wear must be monitored and repaired in order to secure regular fish migration. Maintenance work normally require hand-tools more than heavy equipment. Depending of the site, removal of sediment, branches, logs and floating debris in pools and fishway entrance is common.  Monitoring systems require regular inspection, depending on product and system.
-=Useful MTDs=
+=Relevant MTDs and test cases=
 {{Suitable MTDs for Fishways for eels and lampreys}}