Case study:Environmental design Mandalsvassdraget: Difference between revisions
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{{Case study status | {{Case study status | ||
|Approval status= | |Approval status=Approved | ||
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{{Location | {{Location | ||
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|Multi-site=No | |Multi-site=No | ||
|Project picture=Graving miljodesign mandalselva.jpg | |Project picture=Graving miljodesign mandalselva.jpg | ||
|Picture description=Removal of weirs in the Mandalselva river in connection to efforts to make earlier unproductive | |Picture description=Removal of weirs in the Mandalselva river in connection to efforts to make earlier unproductive zones accessible as spawning and growing areas for salmon. Foto: Agder Energi | ||
|Project summary=Mandalselva is regulated for hydropower production since 1947 and this has impacted the conditions for Atlantic salmon in this river. The project "Miljødesign Mandalselva" used the concept of Environmental Design as described in the "Handbook for environmental design in regulated salmon river (Forseth and Harby 2013) and was accompanied by thorough research efforts in order to study which measures would be suitable to improve the conditions for salmon and at the same time to take into account hydropower production. This researcj was led by the Norwegian Institute for Nature Research (NINA) and conducted in cooperation with SINTEF Energy, Norce Research and Skandinavisk Naturovervåking. It included i.a. a trade-off analysis between the production of Atlantic salmon and the production of hydropower by examining the use of several physical mitigation measures and changes in release of water. Local stakeholders and public natural resource management were involved by means of a counceling group. As a result, nine weirs in the river were removed and further habitat improving measures were put in place (e.g. installation of gravel habitat). | |Project summary=Mandalselva is regulated for hydropower production since 1947 and this has impacted the conditions for Atlantic salmon in this river. The project "Miljødesign Mandalselva" used the concept of Environmental Design as described in the "Handbook for environmental design in regulated salmon river (Forseth and Harby 2013) and was accompanied by thorough research efforts in order to study which measures would be suitable to improve the conditions for salmon and at the same time to take into account hydropower production. This researcj was led by the Norwegian Institute for Nature Research (NINA) and conducted in cooperation with SINTEF Energy, Norce Research and Skandinavisk Naturovervåking. It included i.a. a trade-off analysis between the production of Atlantic salmon and the production of hydropower by examining the use of several physical mitigation measures and changes in release of water. Local stakeholders and public natural resource management were involved by means of a counceling group. As a result, nine weirs in the river were removed and further habitat improving measures were put in place (e.g. installation of gravel habitat). | ||
|Monitoring surveys and results=Monitoring surveys and results are expected to be published soon. | |Monitoring surveys and results=Monitoring surveys and results are expected to be published soon. | ||
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|Physico-chemical quality elements=Nutrient concentrations, | |Physico-chemical quality elements=Nutrient concentrations, | ||
}} | }} | ||
{{Measures}} | {{Measures | ||
|Bank and bed modifications measure=Removal of weirs (9 weirs), installation of gravel habitat, establishment of shelter in the substrate, sediment harrowing (using an excavator); introduction of larger stones in the riverbed, stream | |||
|Floodplain / River corridor=Activation of sidearms | |||
|Management interventions=Future increase of minimum discharge still under evaluation | |||
|Social measures=Active involvement of local interests groups and land owners | |||
}} | |||
{{Hydromorphological quality elements header}} | {{Hydromorphological quality elements header}} | ||
{{End table}} | {{End table}} | ||
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{{Monitoring documents end}} | {{Monitoring documents end}} | ||
{{Additional Documents}} | {{Additional Documents}} | ||
{{Case study documents | |||
|File name=NJFF nr2 2016 web Forseth En suksesshistorie om forksning og tiltak for laks i Mandalselva.pdf | |||
}} | |||
{{Additional Documents end}} | {{Additional Documents end}} | ||
{{Additional links and references header}} | {{Additional links and references header}} | ||
Latest revision as of 14:31, 9 September 2020
Location: 58° 14' 40.24" N, 7° 30' 50.40" E
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Project overview
| Status | Complete |
|---|---|
| Project web site | |
| Themes | Fisheries, Hydropower, Hydromorphology |
| Country | Norway |
| Main contact forename | Aleksander |
| Main contact surname | Andersen |
| Main contact user ID | |
| Contact organisation | Agder Energi |
| Contact organisation web site | http://https://www.ae.no/ |
| Partner organisations | Norwegian Institute for Nature Research (NINA), Sintef, Norce Research, Skandinavisk Naturovervåking |
| Parent multi-site project | |
| This is a parent project encompassing the following projects |
No |
Project summary
Edit project overview to modify the project summary.
Mandalselva is regulated for hydropower production since 1947 and this has impacted the conditions for Atlantic salmon in this river. The project "Miljødesign Mandalselva" used the concept of Environmental Design as described in the "Handbook for environmental design in regulated salmon river (Forseth and Harby 2013) and was accompanied by thorough research efforts in order to study which measures would be suitable to improve the conditions for salmon and at the same time to take into account hydropower production. This researcj was led by the Norwegian Institute for Nature Research (NINA) and conducted in cooperation with SINTEF Energy, Norce Research and Skandinavisk Naturovervåking. It included i.a. a trade-off analysis between the production of Atlantic salmon and the production of hydropower by examining the use of several physical mitigation measures and changes in release of water. Local stakeholders and public natural resource management were involved by means of a counceling group. As a result, nine weirs in the river were removed and further habitat improving measures were put in place (e.g. installation of gravel habitat).
Monitoring surveys and results
Edit project overview to modify the Monitoring survey and results.
Monitoring surveys and results are expected to be published soon.
Lessons learnt
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expected soon...
Image gallery
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Catchment and subcatchment
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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