Case study:Timber float restorations at River Iijoki

This case study is pending approval by a RiverWiki administrator.

Approve case study

 

0.00

(0 votes)

To discuss or comment on this case study, please use the discussion page.

Location: 65° 19' 28.71" N, 25° 25' 40.83" E

Edit location

Loading map...

{"format":"googlemaps3","type":"HYBRID","minzoom":false,"maxzoom":false,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":50,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"... further results","default":"","import-annotation":false,"width":"auto","height":"400px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"visitedicon":"","wmsoverlay":false,"zoom":false,"layers":[],"controls":["pan","zoom","type","scale","streetview","rotate"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"cluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[""],"searchmarkers":"","fullscreen":false,"scrollwheelzoom":false,"showtitle":false,"hidenamespace":true,"template":"Location map popup","userparam":"","activeicon":"","pagelabel":false,"ajaxcoordproperty":"","ajaxquery":"","locations":[{"text":"\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Title:\u003C/b\u003E Restoration of Kostonjoki River\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003ECountry:\u003C/b\u003E \u003Ca href=\"/wiki/index.php?title=Finland\" title=\"Finland\"\u003EFinland\u003C/a\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Status:\u003C/b\u003E Complete\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EThemes:\u003C/b\u003E Social benefits\n\u003C/p\u003E\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E","title":"Restoration of Kostonjoki River","link":"","lat":65.5891009,"lon":28.21917,"icon":"/wiki/images/a/af/Red_marker.png"},{"text":"\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Title:\u003C/b\u003E Timber float restorations at River Iijoki\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003ECountry:\u003C/b\u003E \u003Ca href=\"/wiki/index.php?title=Finland\" title=\"Finland\"\u003EFinland\u003C/a\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Status:\u003C/b\u003E Complete\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EThemes:\u003C/b\u003E Land use management - forestry\n\u003C/p\u003E\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E","title":"Timber float restorations at River Iijoki","link":"","lat":65.3246427,"lon":25.4280088,"icon":"/wiki/images/c/ce/Green_marker.png"}]}

Left click to look around in the map, and use the wheel of your mouse to zoom in and out.

Project overview

Edit project overview

Status	Complete
Project web site	http://www.ymparisto.fi/default.asp?node=5579&lan=fi
Themes	Fisheries, Habitat and biodiversity, Hydropower, Hydromorphology, Land use management - forestry
Country	Finland
Main contact forename	Timo
Main contact surname	Yrjänä
Main contact user ID
Contact organisation	Centre for Economic Development, Transport and the Environment for North Ostrobothnia
Contact organisation web site	http://www.ymparisto.fi/default.asp?node=25563&lan=fi
Partner organisations	Metsähallitus (National Forestry Board)
This is a parent project encompassing the following projects	Restoration of Kostonjoki River

This case study hasn’t got a picture, you can add one by editing the project overview.

Project summary

Edit project overview to modify the project summary.

River Iijoki has been restored mainly because of altered river morphology caused by intensive forestry. Besides the main channel of River Iijoki, also all tributaries of this large river area have been restored. The main channel of the river is mainly harnessed for hydro power production and also two tributaries are regulated.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.

Catchment and subcatchment

Select a catchment/subcatchment

Edit the catchment and subcatchment details
(affects all case studies in this subcatchment)

Catchment

River basin district	Iijoki River basin
River basin	Iijoki River Basin

Subcatchment

River name	Iijoki River
Area category	more than 10000 km²
Area (km2)	14191 km²1,419,100 ha <br />
Maximum altitude category	200 - 500 m
Maximum altitude (m)	370 m0.37 km <br />37,000 cm <br />
Dominant geology	Organic (i.e. Peat)
Ecoregion	Fenno-Scandian Shield
Dominant land cover	Woodland
Waterbody ID

Site

Edit site

Name	Catchment of River Kostonjoki
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Straight, High width:depth, embarked, monotonous
Reference morphology	Sinuous, single channel, Pool-riffle, Run-glide
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
Dominant hydrology	partly regulated, partly natural hydrological regime
Dominant substrate	Cobble
River corridor land use	Woodland
Average bankfull channel width category	10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category	2 - 5 m
Average bankfull channel depth (m)
Mean discharge category	100 - 1000 m³/s
Mean annual discharge (m3/s)	174174 m³/s <br />174,000 l/s <br />
Average channel gradient category	more than 0.1
Average channel gradient
Average unit stream power (W/m2)

Project background

Edit project background

Reach length directly affected (m)
Project started	1988/01/01
Works started
Works completed	2011/12/31
Project completed	2013/12/31
Total cost category	10 - 50 k€
Total cost (k€)	1515 k€ <br />15,000 € <br />
Benefit to cost ratio
Funding sources	Ministry of Agriculture and Forestry

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design			Centre for Economic Development, Transport and the Environment	Timo	Yrjänä
Stakeholder engagement and communication
Works and works supervision	1 - 10 k€		Centre for Economic Development, Transport and the Environment	Timo	Yrjänä
Post-project management and maintenance	1 - 10 k€
Monitoring			Metsähallitus, federal forestry center

Reasons for river restoration

Edit reasons for restoration

Mitigation of a pressure	Timber floating
Hydromorphology	Quantity & dynamics of flow, Width & depth variation, Flow velocities, Structure & condition of riparian zones
Biology	Fish: Abundance, Fish: Disturbance-sensitive species, Invertebrates: Disturbance-sensitive species
Physico-chemical
Other reasons for the project	Flood risk management

Measures

Edit Measures

Structural measures
Bank/bed modifications	Building submerged weirs, Removal of old logs, Re-introducing stones, Removal of revetments
Floodplain / River corridor
Planform / Channel pattern	Introducing sinuosity
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
Quantity & dynamics of flow		Yes				Improvement
Width & depth variation		Yes				Improvement
Channel pattern/planform		Yes				Improvement
Flow velocities		Yes				Improvement
Structure & condition of riparian zones		Yes				Improvement

Biological quality elements

Edit biological
quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Fish: Abundance		Yes				Awaiting results
Fish: Disturbance-sensitive species		Yes				Awaiting results
Invertebrates: Disturbance-sensitive species		Yes				Awaiting results

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

Image gallery

Edit Image gallery

Map of Iijoki catchment

Additional documents and videos

Upload additional documents

Additional links and references

Edit links and references

Link	Description

Supplementary Information

Edit Supplementary Information