Complete or partial migration barrier removal - Revision history

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

2020-10-26T10:00:41Z

2020-09-30T19:29:13Z

During planning

2020-06-01T17:24:22Z

Relevant Literature

2020-04-06T12:09:08Z

2020-04-05T14:25:01Z

2020-03-12T12:40:33Z

2020-03-11T10:46:30Z

During planning

2020-01-21T14:21:27Z

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

2020-01-20T14:09:01Z

2019-10-28T10:30:48Z

Classification table

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 =Relevant Literature=
 *Fjeldstad, H-P, Barlaup, B.T., Stickler, M, Gabrielsen, S.-E. and Alfredsen, K. 2012. Removal of weirs and the influence on physical habitat for salmonids in a Norwegian river. River Research and Applications; 28, pp. 753-763,  https://doi.org/10.1002/rra.1529
-[[category:Upstream fish migration measures]][[category:Measures]]
+[[category:Upstream fish migration measures]][[category:Solutions]]

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 ==During planning==
-Planning of fish barrier removal will start with mapping and surveying of the barrier itself and the river reach upstream and downstream of the barrier. This includes measurements of water covered area, water edges and river slope and the bathymetry of the area. Geographic data should be handled in GIS software for further planning and analyses. The construction planning should be supported with simple hydraulic modelling or calculations, such as the models River2D, HEC-RAS 2D, OpenFoam or Telemac 2D and 3D. The physical adjustments should then be planned according to the hydraulic calculations, assuring a stable bottom substrate and hydraulic conditions suitable for fish migrations.
+Planning of fish barrier removal will start with mapping and surveying of the barrier itself and the river reach upstream and downstream of the barrier. This includes measurements of water covered area, water edges and river slope and the bathymetry of the area. Geographic data should be handled in GIS software for further planning and analyses. The construction planning should be supported with simple hydraulic modelling or calculations, such as the models [[River2D]], [[HEC-RAS]] 2D, [[OpenFOAM]] or [[TELEMAC]] 2D and 3D. The physical adjustments should then be planned according to the hydraulic calculations, assuring a stable bottom substrate and hydraulic conditions suitable for fish migrations.
 ==During implementation==

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 =Relevant Literature=
+*Fjeldstad, H-P, Barlaup, B.T., Stickler, M, Gabrielsen, S.-E. and Alfredsen, K. 2012. Removal of weirs and the influence on physical habitat for salmonids in a Norwegian river. River Research and Applications; 28, pp. 753-763,  https://doi.org/10.1002/rra.1529
 [[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:barrier_removal_norway.png\|thumb\|250px\|Figure 1: Removal of concrete weir in Norway by use of explosives and excavator.]]		[[file:barrier_removal_norway.png\|thumb\|250px\|Figure 1: Removal of concrete weir in Norway by use of explosives and excavator.]]

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 =Introduction=
-[[file:barrier_removal_norway.png|thumb|500px|Figure 1: Removal of concrete weir in Norway by use of explosives and excavator.]]
+[[file:barrier_removal_norway.png|thumb|250px|Figure 1: Removal of concrete weir in Norway by use of explosives and excavator.]]
 If connectivity is to be restored, it should initially be considered whether the migration barrier can be removed. It is often the best and most long-term solution if the goal is to recreate connectivity. Here, the solution focuses on rivers regulated for hydropower production where dams will basically be maintained, but also in other regulated rivers there are possibilities for removing obstacles. Only in the Alpine region of Europe, a large number of dams have been built for river bed stabilization, and many of these have been replaced by block ramps, complete or partial removed. In addition, smaller weirs have been removed in residual flow reaches or minimum flow reaches with great success (Fjeldstad et al. 2012).

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 =Classification table=
 {{Complete or partial migration barrier removal}}
 [[category:Upstream fish migration measures]][[category:Measures]]

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 Physical habitat measures in regulated rivers must often be maintained to ensure that functions related to flow and sediments are restored, such as flood events and connectivity of the sediments. The frequency of the maintenance will be very site-specific.
-=Useful MTDs=
+=Relevant MTDs and test cases=
 {{Suitable MTDs for Complete or partial migration barrier removal}}