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.

Monitoring surveys and results

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Catchment and subcatchment

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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 />
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Dominant geology
Ecoregion	Fenno-Scandian Shield
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Site

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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
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Project background

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Reasons for river restoration

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Measures

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Monitoring

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quality elements

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