Case study:Restoration of Kocksbybäcken brook

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Location: 60° 4' 43.22" N, 24° 13' 31.82" 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	Jukka
Main contact surname	Jormola
Main contact user ID
Contact organisation	SYKE
Contact organisation web site	http://www.environment.fi
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Kocksbybäcken brook after restoration (photo:Liisa Hämäläinen)

Project summary

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The Kocksbybäcken brook is a tributary of the Ingarskilanjoki River in Degerby village in the municipality of Inkoo. The catchment area of the brook is 11 km2. Kocksbybäcken brook was restored in the as the aim of enhancing the habitat diversity of the brook for migratory trout. The object was to support the natural development of the brook by adding sinousity and width and depth variation. Also stones and gravel were added and replaced to create habitats for the brown trout. The restored part was 330m Brook serves as a drainage channel for the surrounding agricultural fields

In the case of Kocksbybäcken brook, only few trouts were found in the research section in 2005 before restoration. However, the number of juvenile trouts in the reference section downstream was exceptionally high, with 300 juveniles per 100 m². After restoration in 2006, only few trouts were found in the reference section and none in the restored section. One reason was that the year was too dry for juvenile trout production. In 2007 trout number increased in the restored section

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Kocsbybäcken brook before restoration (photo: Liisa Hämäläinen)

Restoration of Kocksbybäcken brook (photo: Liisa Hämäläinen)

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Ingarsilanjoki River Basin River basin Subcatchment River name Kocksbybäcken Brook Area category 10 - 100 km² Area (km2) 11 km²1,100 ha <br /> Maximum altitude category Maximum altitude (m) Dominant geology Organic (i.e. Peat) Ecoregion Fenno-Scandian Shield Dominant land cover Intensive agriculture (arable) Waterbody ID Site Edit site Name Catchment of Kocksbybäcken Brook WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology over-widened, overdeepened, Sinuous Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present Species of interest Dominant hydrology Ephemeral Dominant substrate River corridor land use Intensive agriculture (arable) 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) Project started Works started Works completed Project completed Total cost category 1 - 10 k€ Total cost (k€) 4 k€4,000 € <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 Width & depth variation, Continuity for organisms Biology Fish: Disturbance-sensitive species, Fish: Abundance Physico-chemical Nutrient concentrations Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Adding sinuosity, Re-introducing stones, Introduction of gravel 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 Fish: Abundance Improvement 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 Additional links and references Edit links and references Link Description http://www.ecosystemsclimate.org/WatchRead Drainage and fishery needs in the restoration of agricultural brooks. Supplementary Information Edit Supplementary Information