Case study:Merikoski fishway

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Location: 65° 1' 18.97" N, 25° 29' 15.05" E

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity, Hydropower
Country	Finland
Main contact forename	Anne
Main contact surname	Laine
Main contact user ID
Contact organisation	Centre for Economic Development, Transport and the Environment for North Ostrobothnia
Contact organisation web site	http://www.oulunenergia.fi/ymparistovastuu/kalatie
Partner organisations
Parent multi-site project	Case_study:Restoration of Oulujoki River
This is a parent project encompassing the following projects	No

The Merikoski Fishway (Photo: Pinja Kasvio)

Project summary

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Construction of the fishway in the Merikoski brook was the first step restoring the Oulujoki river for migrating fish. Merikoski water power plant was the lowest obstacle for fish migration before the fishway was constructed in 2003. The constructed fishway now enables salmon and other migtating fish to rise up 40 km to the lower reaches of the Oulujoki river. Migratory fishes are planted into the Merikoski every year. Also the fish migration, the amount and types of the fishes are monitored with the help of underwater videocamera and fish counter.

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district - River basin Oulujoki River basin Subcatchment River name Oulujoki River Area category more than 10000 km² Area (km2) 2284122,841 km² <br />2,284,100 ha <br /> Maximum altitude category Maximum altitude (m) Dominant geology Ecoregion Fenno-Scandian Shield Dominant land cover Waterbody ID Site Edit site Name Merikoski torrent water power plant WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Artificial channel Reference morphology Artificial channel, 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 Brown trout (Salmo trutta), Atlantic salmon (Salmo salar) Dominant hydrology Artificially regulated Dominant substrate River corridor land use 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 Edit project background Reach length directly affected (m) Project started Works started Works completed Project completed Total cost category Total cost (k€) 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit 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 Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information