Case study:Biologisk återställning i Rolfsåns vattensystem: Difference between revisions
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{{ | {{Case study status | ||
|Approval status= | |Approval status=Approved | ||
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{{Location | {{Location | ||
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|Main contact forename=Andreas | |Main contact forename=Andreas | ||
|Main contact surname=Bäckstrand | |Main contact surname=Bäckstrand | ||
|Main contact id=Arolam | |||
|Contact organisation=County Administrative Board of Västra Götaland | |Contact organisation=County Administrative Board of Västra Götaland | ||
|Contact organisation url=projektwebbar.lansstyrelsen.se/ROLFSAN/SV/Pages/default.aspx | |Contact organisation url=projektwebbar.lansstyrelsen.se/ROLFSAN/SV/Pages/default.aspx | ||
|Multi-site=Yes | |Multi-site=Yes | ||
|Project picture=Myrekulla380A.jpg | |||
|Picture description=http://projektwebbar.lansstyrelsen.se/rolfsan/Sv/folj-atgardsarbetet/rolfsan/Pages/rolfsan.aspx | |||
|Project summary=The River Rolfsån in South West Sweden had large populations of salmon, trout and european eel in the 1800s. After expansion of hydropower, cleansing of rivers and intensive fishing in the last hundred years there has been sharp decrease on the amount of migrating fish stocks. The river has been classified as extremely valuable by its natural characteristics. National Board of Fisheries classed the population particularly worth of protection. The Atlantic Salmon in Rolfså is unique, Fish are large and there has not been mixing between farmed salmon. The River was restored for sea migrating brown trout and eel, Atlantic salmon and river pearl mussel in co-operation with two administrative boards, four municipalities, the Swedish Agency for Marine and Water Management and land owners and fishing associations. The project started in 2006 and there has been two nature like bypass channels, one pool fishway and one downstream fishway built. Also one hydroelectric powerplant dam and two weirs has been removed and some streams has been restored as habitat for migrating fish. | |Project summary=The River Rolfsån in South West Sweden had large populations of salmon, trout and european eel in the 1800s. After expansion of hydropower, cleansing of rivers and intensive fishing in the last hundred years there has been sharp decrease on the amount of migrating fish stocks. The river has been classified as extremely valuable by its natural characteristics. National Board of Fisheries classed the population particularly worth of protection. The Atlantic Salmon in Rolfså is unique, Fish are large and there has not been mixing between farmed salmon. The River was restored for sea migrating brown trout and eel, Atlantic salmon and river pearl mussel in co-operation with two administrative boards, four municipalities, the Swedish Agency for Marine and Water Management and land owners and fishing associations. The project started in 2006 and there has been two nature like bypass channels, one pool fishway and one downstream fishway built. Also one hydroelectric powerplant dam and two weirs has been removed and some streams has been restored as habitat for migrating fish. | ||
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The project was managed and mostly financed by the Länsstyrelse/Västra Götaland (regional environmental authority). The rest of the financing has been organized by the national environmental institute, Naturvårdsvärket, who is responsible for targeting the money collected from the hydro power companies to the watercourses which have been deteriorated by hydro power production. | The project was managed and mostly financed by the Länsstyrelse/Västra Götaland (regional environmental authority). The rest of the financing has been organized by the national environmental institute, Naturvårdsvärket, who is responsible for targeting the money collected from the hydro power companies to the watercourses which have been deteriorated by hydro power production. | ||
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{{Case_study_subcatchment | {{Case_study_subcatchment | ||
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|WFD water body code=SE640778- 130948 | |WFD water body code=SE640778- 130948 | ||
|WFD water body name=Rolfsån River | |WFD water body name=Rolfsån River | ||
|Pre-project morphology=There were several dams | |Pre-project morphology=There were several dams, which cut the migration of fish | ||
|Reference morphology=To take off old dams and build fisways next to | |Reference morphology=To take off old dams and build fisways next to existing power plants | ||
|Heavily modified water body=No | |Heavily modified water body=No | ||
|Site designation=EU - Special Area of Conservation | |Site designation=EU - Special Area of Conservation | ||
|Protected species present=No | |Protected species present=No | ||
|Invasive species present=No | |Invasive species present=No | ||
|Species=Sea trout (Salmo trutta), European eel (Anguilla anguilla), minnow, Brown trout (Salmo trutta), Atlantic salmon (Salmo salar), | |||
|Dominant substrate=Gravel,Sand,Cobble | |Dominant substrate=Gravel,Sand,Cobble | ||
|River corridor land use=Woodland | |River corridor land use=Woodland | ||
|Average bankfull channel width category=10 - 50 m | |||
|Mean discharge category=1 - 10 m³/s | |||
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{{Project background | {{Project background | ||
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{{Measures | {{Measures | ||
|Bank and bed modifications measure= | |Bank and bed modifications measure=Dam removal, Creation of fish passes, | ||
|Planform / Channel pattern=Dam removal, Creation of fish passes | |||
|Planform / Channel pattern= | |||
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{{Additional_Documents}} | {{Additional_Documents}} | ||
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Latest revision as of 08:58, 2 June 2017
Location: 57° 29' 20.85" N, 12° 7' 12.51" E
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Project overview
| Status | Complete |
|---|---|
| Project web site | http://projektwebbar.lansstyrelsen.se/rolfsan/Sv/Pages/default.aspx |
| Themes | Fisheries, Habitat and biodiversity, Hydropower |
| Country | Sweden |
| Main contact forename | Andreas |
| Main contact surname | Bäckstrand |
| Main contact user ID | User:Arolam |
| Contact organisation | County Administrative Board of Västra Götaland |
| Contact organisation web site | http://projektwebbar.lansstyrelsen.se/ROLFSAN/SV/Pages/default.aspx |
| Partner organisations | |
| This is a parent project encompassing the following projects |
Apelnäs fishway at River Rolfså, Bosgården nature-like fishway at River Rolfså, Dam removal at Grönkullen, River Rolfsån, Restorations of River Nolån-Hulta dam removal, ´Restorations of River Nolån-Bypass channel in Hulta Hydro power plant, ´Restorations of River Nolån-Fishway in Forsa hydro power plant, Ålgårda nature-like bypass channel at River Rolfsån |
Project summary
Edit project overview to modify the project summary.
The River Rolfsån in South West Sweden had large populations of salmon, trout and european eel in the 1800s. After expansion of hydropower, cleansing of rivers and intensive fishing in the last hundred years there has been sharp decrease on the amount of migrating fish stocks. The river has been classified as extremely valuable by its natural characteristics. National Board of Fisheries classed the population particularly worth of protection. The Atlantic Salmon in Rolfså is unique, Fish are large and there has not been mixing between farmed salmon. The River was restored for sea migrating brown trout and eel, Atlantic salmon and river pearl mussel in co-operation with two administrative boards, four municipalities, the Swedish Agency for Marine and Water Management and land owners and fishing associations. The project started in 2006 and there has been two nature like bypass channels, one pool fishway and one downstream fishway built. Also one hydroelectric powerplant dam and two weirs has been removed and some streams has been restored as habitat for migrating fish.
All and allreproductive area for salmon and sea migrating broun trout has expanded from 35 000 square meters to 250 000 square meters.
The project was managed and mostly financed by the Länsstyrelse/Västra Götaland (regional environmental authority). The rest of the financing has been organized by the national environmental institute, Naturvårdsvärket, who is responsible for targeting the money collected from the hydro power companies to the watercourses which have been deteriorated by hydro power production.
Monitoring surveys and results
This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.
Lessons learnt
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Catchment and subcatchmentSelect a catchment/subcatchment
Catchment
Subcatchment
Other case studies in this subcatchment: Apelnäs fishway at River Rolfså, Bosgården nature-like fishway at River Rolfså, Dam removal at Grönkullen, River Rolfsån, Restorations of River Nolån-Hulta dam removal, ´Restorations of River Nolån-Bypass channel in Hulta Hydro power plant, ´Restorations of River Nolån-Fishway in Forsa hydro power plant, Ålgårda nature-like bypass channel at River Rolfsån
Site
Project background
Cost for project phases
Reasons for river restoration
Measures
MonitoringHydromorphological quality elements
Biological quality elements
Physico-chemical quality elements
Any other monitoring, e.g. social, economic
Monitoring documents
Additional documents and videos
Additional links and references
Supplementary InformationEdit Supplementary Information
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