Case study:Restoration of Siuruanjoki River

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Location: 65° 24' 22.66" N, 25° 52' 29.76" E

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Project overview

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Status	Complete
Project web site
Themes	Land use management - agriculture, Land use management - forestry, Social benefits, Water quality
Country	Finland
Main contact forename	-
Main contact surname	-
Main contact user ID
Contact organisation	Regional Environment Institute
Contact organisation web site
Partner organisations
This is a parent project encompassing the following projects

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Project summary

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Siuruanjoki River is located Northern part of Finland and is one of the tributaries of Iijoki River. The project ”Siuruanjoki kuntoon” (Making Siuruanjoki River Fit) objective was to apply various means of mitigate the diffuse loading impacts of a large watershed area within three municipalities in Northern Finland; i.e. within the Provinces of Lapland and Ostrobotnia. The project was carried out in Ostrobothnia in the years 2000-2006.

The project aim was to improve the quality of the water in Siuruanjoki River and the condition of the water system in such a way that it would be better suited to meet the needs of recreation, fishing, and tourism. The project was accomplished by mitigating the impacts of diffuse loading, restoring parts of the water system, and tending the river bank areas. The diffuse loading was mitigated by reducing the external loading from agriculture and forestry, and by improving the waste water treatment solutions used with regard to the rural population and holiday-home users. Lake Saunajarvi in the area of Pudasjarvi was restored by means of intensified fishing aimed at ridding the lake of undesirable and excessive fish species. In addition, the project included the central objective of adding to the environmental awareness and sense of responsibility of the local people.

Among the achievements of the project were the formulation of overall forestry-related plans for the protection of the water system, trials with new peat-production-related methods of treating run-off water, formulation of property-specific plans for improving the treatment of waste water, and nutrient balance studies were created for farms along with the conducting of environmental assessments. The project was mostly managed by Regional Environmental Agency of Ostrobothnia Pohjois-Pohjanmaan ymparistokeskus in close co-operation with local actors. The project had a total budget of € 630,705.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	Iijoki River basin
River basin	Siuruanjoki River Basin

Subcatchment

River name	Siuruanjoki River
Area category	1000 - 10000 km²
Area (km2)	2387 km²238,700 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology	Organic (i.e. Peat)
Ecoregion	Fenno-Scandian Shield
Dominant land cover	bog
Waterbody ID

Site

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Name	Catchment of Siuruanjoki 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
National/international site designation
Local/regional site designations	multiple designations across the site
Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use	Coniferous plantation
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

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Reach length directly affected (m)
Project started	2000/01/01
Works started
Works completed	2006/01/01
Project completed
Total cost category	500 - 1000 k€
Total cost (k€)	850 k€850,000 € <br />
Benefit to cost ratio
Funding sources	European Regional Development Fund (ERDF), Regional eEnvironment Institutes, Cities of Pudasjärvi, Yli-Ii and Ranua

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

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Mitigation of a pressure	Riparian development
Hydromorphology	Continuity for organisms, Structure & condition of riparian/ lake shore zones
Biology	Fish: Abundance, Fish: Species composition
Physico-chemical	Nutrient concentrations
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor	removal of embankments, creation of wetlands, establishment of woodland
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)	Awaress-raising
Other	Information provision, Participation in works, Participation in monitoring

Monitoring

Hydromorphological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
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Biological quality elements

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quality elements

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Physico-chemical quality elements

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quality elements

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Any other monitoring, e.g. social, economic

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Element	When monitored		Type of monitoring		Control site used	Result
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Monitoring documents

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Image gallery

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Catchment of Siuruanjoki River

Bank reinforcement

Constructed sedimentation basin

Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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