Case study:Restoration of the rivers connected to the Lake Kitkajärvi

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Location: 66° 10' 13.80" N, 28° 38' 19.00" E

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity
Country	Finland
Main contact forename	Jarmo
Main contact surname	Huhtala
Main contact user ID	User:Kasvio
Contact organisation	Centre for Economic Development, Transport and the Environment for Lapland
Contact organisation web site	http://www.ely-keskus.fi/en/web/ely-en/frontpage
Partner organisations
This is a parent project encompassing the following projects

River Suonnanjoki after the restoration work (photo J. Huhtala)

Project summary

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The restoration work was primary done to enhace the population and the nesting and breeding habitats for fish. Four rivers Riisijoki, Tolvanjoki, Suonnanjoki and Kirintöjoki were restored during year 2013. Rivers were restored in 18 rapid areas and the area altogether is nowadays approximately 3,3 ha. River Kirintöjoki was restored by 7 925 m², River Suonnanjoki 7 150 m², River Tolvanjoki 2 300 m² and River Riisijoki 6 200 m². The task was to make the environment of the straightened rapid areas more diverse and shape them into more natural state. The work was done with the help of heavy machinery.

Expecially the trout population will benefit from the restoration work, because the requirements for the species reproduction were significantly enhanced. Now the rapid areas provides also possibilities for the grayling population to grow as well as many other freshwater species.

The Centre for Economic Development, Transport and the Environment for Lapland made the restoration plans and completed the work aswell. The results were monitored during and after the restoration had been completed. The Ministry of the Agriculuture and forestry and the City of Posio were responsible of the restoration expences.

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Image gallery

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River Riisijoki before the work.

River riisijoki after the restoration.

River Sunnanjoki before.

River Sunnanjoki after the restoration

River Kirintö before the restoration.

River Kirintöjoki after the work.

River Riisijoki before the work.

River Riisijoki after the restoration.

Map of River Riisijoki

Map of River Suonnanjoki

Map of River Kirintojoki

Map of River Tolvanjoki

Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations Protected species present Yes Invasive species present No Species of interest grayling (Thymallus thymallus), Brown trout (Salmo trutta) Dominant hydrology Dominant substrate Gravel River corridor land use Woodland 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) 70007,000 m <br />7 km <br />700,000 cm <br /> Project started 2013/02/28 Works started Works completed Project completed 2013/10/31 Total cost category Total cost (k€) 8686 k€ <br />86,000 € <br /> 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 Map of the rivers that were restored. Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information