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

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Site

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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 />
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Project background

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Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
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Reasons for river restoration

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Mitigation of a pressure	Hydropower, Barriers to fish migration
Hydromorphology	Continuity for organisms
Biology	Fish
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Measures

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Monitoring

Hydromorphological quality elements

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