Case study:Restoration of Oulujoki River

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Location: 64° 59' 58.90" N, 25° 33' 49.48" E

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Project overview

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Status	In progress
Project web site
Themes	Fisheries, Habitat and biodiversity, Hydropower, Hydromorphology
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
Partner organisations
This is a parent project encompassing the following projects	Merikoski fishway

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Project summary

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The River Oulujoki was former known as an excellent salmon river. In the early 1940´s started constructions of the waterpower plants and fish migration was hindered. Nowadays there are seven waterpower plants in the River Oulujoki and the whole river is harnessed for water production.

Restorations of the Oulujoki River started at 1998 as the aim of restoring the river for recreation, fishing, and tourism. Merikoski fishway was the first step towards more natural river corridor and enabling migrating fish to rise up to the lower reaches of the river. In the beginning of 2009 North Ostrobothnian and Kainuu Centres for Economic Development, Transport and the Environment and Finnish Game and Fisheries Research Institute started the project “Oulujoki fishways - planning and supportive actions” funded by European Regional Development Fund. The object was to recreate habitats and reproduction areas for trout for the whole river length. As part of this project fishway plans for six other water power plants was made.

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name Oulujoki River WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology 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 Salmon, Trouts 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 100 - 1000 m³/s Mean annual discharge (m3/s) 259259 m³/s <br />259,000 l/s <br /> 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 2009 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 Hydropower, Barriers to fish migration Hydromorphology Continuity for organisms Biology Fish Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Creation of fish passes, Creation of fish spawn nursing places 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