Case study:Odder Stream Restoration

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Location: 55° 55' 58.33" N, 9° 18' 34.86" E

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Project overview

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Status	Complete
Project web site	http://www.vejle.dk/Borger/Natur-og-miljoe/Naturprojekter/Odderbaek--projekter-i-hele-oplandet.aspx
Themes	Habitat and biodiversity, Land use management - agriculture
Country	Denmark
Main contact forename	Bo
Main contact surname	Levesen
Main contact user ID
Contact organisation	Vejle Kommune
Contact organisation web site	http://www.vejle.dk/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

The Odder before (right) and after (left) restoration

Project summary

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This project aimed to:

(1) Remove 480 kg P per year – equals ¾ of the total Phosphorus loading to Kul Lake; (2) Remove 18 tons N per year or 114 kg/N/ha per year; (3) Stoppage of vegetation cutting and dredging; (4) Removal of all dams/weirs in the entire watershed; (5) Ensure habitat for the orchid Coralroot (Corallorhiza trifida) and Western marsh orchid (Dactylorhiza majalis; (6) Improve habitat for the European brook lamprey (Lampetra planeri) and Eurasian otter (Lutra lutra; and (7) Open the area to the public for recreation – 37 km of trials.

The restoration activities in the first 65 hectares included:

(1) Restoring 1.3 km of stream; (2) Raised the stream bed 50 – 80 cm; (3) Crushed/removed 25 drain systems and 7 ditches; (4) Spawning grounds every 20 meters in the stream – 650 m3 gravel; (5) 15.2 hectares of permanent/semi-permanent wetlands; (6) 8.5 hectares of seasonally flooded wetlands; (7) 6 hectares of seepage wetlands from removing drains; and (8) Area is fenced to allow grazing over entire area – special agreements between land owners.

The River Restoration Centre would like to thank Matthew William Cochran, from ORBICON, for providing the information and photographs for this case study.

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Image gallery

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Jutland and Funen River basin Odder Subcatchment River name Area category Area (km2) Maximum altitude category Maximum altitude (m) Dominant geology Ecoregion Dominant land cover Waterbody ID Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Odder Stream 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 No Invasive species present No Species of interest Dominant hydrology Dominant substrate River corridor land use 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) 65 hectares"hectares" is not declared as a valid unit of measurement for this property. Project started Works started Works completed Project completed 2010/11/01 Total cost category Total cost (k€) 2,975.814632,975.815 k€ <br />2,975,814.63 € <br /> Benefit to cost ratio Funding sources Danish Ministry of Food, Agriculture and Fisheries; Vejle Kommune 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 Supplementary funding information Costs 10,840,000 Danish Kroners ( ,971,000 million) support from the Danish Ministry of Food, Agriculture and Fisheries 250,000 DKK (,500) support from Vejle Kommune 11,090,000 DKK (,016,000) Archaeology survey – 23,000 DKK (,000) Construction costs – 1,925,000 DKK (0,000) Administrative costs – 26,000 DKK (,000) Compensation to landowners – 7,875,000 DKK ( ,430,000) Maintenance of wetland area (grazing) – 985,000 DKK (0,000) Design and consulting services – 250,000 DKK (,500) Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Barriers to fish migration, Phosphate Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Re-introducing of stones and spawning gravel, Bed raising Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Removed 25 drain systems and 7 ditches 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 Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information