Case study:Apelnäs fishway at River Rolfså: Difference between revisions
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|Name of parent multi-site project=Case_study:Biologisk återställning i Rolfsåns vattensystem | |Name of parent multi-site project=Case_study:Biologisk återställning i Rolfsåns vattensystem | ||
|Multi-site=No | |Multi-site=No | ||
|Project summary=The Apelnäs powerplant was built in 1940. In 1995 a denil fishway was built and adapted for a minimum amount of water 300 L/s. A fish counter was placed at the upper end of the fishway. It was noticed that fish only migrated downstream, not upstream. The reason was that the fish could not find the fishway and there was still too little amount of water. A pool type fishway was decided to build because it was not possible to build a bypass channel because of steep steepness and rock-bedded bottom. The realisation of the new fishway was 2009. After the finish of the pool-type fishway, the water flow was increased from 300 to 600 L/s for two months annually. In addition, the power plant will every September and October be turned off entirely for 10 hours on one day a week. This will provide an attraction flow for migrating trout during its spawning time. | |Project summary=The Apelnäs powerplant was built in 1940. In 1995 a denil fishway was built and adapted for a minimum amount of water 300 L/s. A fish counter was placed at the upper end of the fishway. It was noticed that fish only migrated downstream, not upstream. The reason was that the fish could not find the fishway and there was still too little amount of water. A pool-type fishway (on left-hand side in the picture) was decided to build because it was not possible to build a bypass channel because of steep steepness and rock-bedded bottom. The realisation of the new fishway was 2009. After the finish of the pool-type fishway, the water flow was increased from 300 to 600 L/s for two months annually. In addition, the power plant will every September and October be turned off entirely for 10 hours on one day a week. This will provide an attraction flow for migrating trout during its spawning time. | ||
To consider the eel, the top of the fishway walls were made slope and a little amount of water was entered to there. The idea was to have moss growing there, since it is excellent climbing material for eels. Also some 50 mm holes were made to the walll of the fishway to help the migrating eels to swim through them. | To consider the eel, the top of the fishway walls were made slope and a little amount of water was entered to there. The idea was to have moss growing there, since it is excellent climbing material for eels. Also some 50 mm holes were made to the walll of the fishway to help the migrating eels to swim through them. | ||
Revision as of 10:14, 24 April 2013
This case study is pending approval by a RiverWiki administrator.
Project overview
| Status | Complete |
|---|---|
| Project web site | http://projektwebbar.lansstyrelsen.se/rolfsan/Sv/folj-atgardsarbetet/Pages/Storan_apelnas_kraftverk.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 | Länsstyrelsen västra Götalands län |
| Contact organisation web site | http://http://projektwebbar.lansstyrelsen.se/rolfsan/Sv/kontakt/Pages/kontakta-oss.aspx |
| Partner organisations | |
| Parent multi-site project | |
| This is a parent project encompassing the following projects |
No |
Project summary
The Apelnäs powerplant was built in 1940. In 1995 a denil fishway was built and adapted for a minimum amount of water 300 L/s. A fish counter was placed at the upper end of the fishway. It was noticed that fish only migrated downstream, not upstream. The reason was that the fish could not find the fishway and there was still too little amount of water. A pool-type fishway (on left-hand side in the picture) was decided to build because it was not possible to build a bypass channel because of steep steepness and rock-bedded bottom. The realisation of the new fishway was 2009. After the finish of the pool-type fishway, the water flow was increased from 300 to 600 L/s for two months annually. In addition, the power plant will every September and October be turned off entirely for 10 hours on one day a week. This will provide an attraction flow for migrating trout during its spawning time.
To consider the eel, the top of the fishway walls were made slope and a little amount of water was entered to there. The idea was to have moss growing there, since it is excellent climbing material for eels. Also some 50 mm holes were made to the walll of the fishway to help the migrating eels to swim through them.
Monitoring surveys and results
Lessons learnt
Catchment and subcatchment
Edit the catchment and subcatchment details
(affects all case studies in this subcatchment)
Catchment
| River basin district | Skagerrak and Kattegat River basin |
|---|---|
| River basin | Rolfsån River Basin |
Subcatchment
| River name | River Rolfsån |
|---|---|
| Area category | |
| Area (km2) | |
| Maximum altitude category | |
| Maximum altitude (m) | |
| Dominant geology | Organic (i.e. Peat) |
| Ecoregion | Fenno-Scandian Shield |
| Dominant land cover | Woodland, Intensive agriculture (arable) |
| Waterbody ID |
Other case studies in this subcatchment: Biologisk återställning i Rolfsåns vattensystem, 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
| Name | Apelnäs hydropowerplant at river Storån |
|---|---|
| WFD water body codes | |
| WFD (national) typology | |
| WFD water body name | River Storån |
| Pre-project morphology | Artificial bed |
| Reference morphology | Pool fishway |
| Desired post project morphology | |
| Heavily modified water body | Yes |
| National/international site designation | |
| Local/regional site designations | |
| Protected species present | No |
| Invasive species present | No |
| Species of interest | |
| Dominant hydrology | Artificially regulated |
| Dominant substrate | Bedrock |
| River corridor land use | Woodland, Intensive agriculture (arable) |
| Average bankfull channel width category | |
| Average bankfull channel width (m) | |
| Average bankfull channel depth category | |
| Average bankfull channel depth (m) | |
| Mean discharge category | |
| Mean annual discharge (m3/s) | |
| Average channel gradient category | |
| Average channel gradient | |
| Average unit stream power (W/m2) |
Project background
| Reach length directly affected (m) | |
|---|---|
| Project started | 2008 |
| Works started | |
| Works completed | |
| Project completed | |
| Total cost category | 100 - 500 k€ |
| Total cost (k€) | 138138 k€ <br />138,000 € <br /> |
| Benefit to cost ratio | |
| Funding sources |
Cost for project phases
| Phase | cost category | cost exact (k€) | Lead organisation | Contact forename | Contact surname |
|---|---|---|---|---|---|
| Investigation and design | |||||
| Stakeholder engagement and communication | |||||
| Works and works supervision | |||||
| Post-project management and maintenance | |||||
| Monitoring |
Reasons for river restoration
| Mitigation of a pressure | Mitigation of hydropower and creating more spawning habitats for migrating fish |
|---|---|
| Hydromorphology | |
| Biology | |
| Physico-chemical | |
| Other reasons for the project |
Measures
Structural measures
| |
|---|---|
| Bank/bed modifications | |
| Floodplain / River corridor | |
| Planform / Channel pattern | |
| Other | |
Non-structural measures
| |
| Management interventions | |
| Social measures (incl. engagement) | |
| Other | |
Monitoring
Hydromorphological quality elements
| Element | When monitored | Type of monitoring | Control site used | Result | ||
|---|---|---|---|---|---|---|
| Before measures | After measures | Qualitative | Quantitative | |||
Biological quality elements
| Element | When monitored | Type of monitoring | Control site used | Result | ||
|---|---|---|---|---|---|---|
| Before measures | After measures | Qualitative | Quantitative | |||
Physico-chemical quality elements
| Element | When monitored | Type of monitoring | Control site used | Result | ||
|---|---|---|---|---|---|---|
| Before measures | After measures | Qualitative | Quantitative | |||
Any other monitoring, e.g. social, economic
| Element | When monitored | Type of monitoring | Control site used | Result | ||
|---|---|---|---|---|---|---|
| Before measures | After measures | Qualitative | Quantitative | |||
Monitoring documents
Image gallery
Additional documents and videos
Additional links and references
| Link | Description |
|---|
Supplementary Information
Edit Supplementary Information