Case study:Regional Actions to Improve Nature in River Odense and Odense Fjord (REGAIN)

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Location: 55° 29' 18", 10° 31' 15"
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Project overview

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Status Complete
Project web site
Themes Habitat and biodiversity
Country Denmark
Main contact forename Annette Strøm
Main contact surname Jacobsen
Main contact user ID
Contact organisation The Nature Agency, Danish Ministry of the Environment.
Contact organisation web site http://www.naturstyrelsen.dk/
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
Project picture

Project summary

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The River Odense is designated as pSCI and Odense Fjord as pSCI and SPA for its ecological value and importance in sustaining bird and freshwater species. "Unio crassus" is a species of freshwater mussel with declining populations all across Europe, which is only found in the River Odense in Denmark.

The river-fjord ecosystem, with its habitat types and bird species, is vulnerable to deterioration due to poor physical variation in River Odense, heavy nutrient loads into the Odense Fjord and degradation of the wetlands. In 2004 the project “Regional Actions for Improvement of Nature in River Odense and Odense Fjord” (REGAIN) was approved by the EU as a LIFE Nature project, for which financing was secured from a combination of grants from the state and the county.

The REGAIN project aimed to enhance the conservation status of the shallow inlet Odense Fjord and to improve the ecological conditions in River Odense, including the sea meadows along the shores of Odense Fjord and of various fresh water wetlands on River Odense riparian areas. This is to meet good conservation status under the Habitats Directive for the species included in Annex II: "Unio crassus", "Vertiego moulinsiana", "Lampetra planeri" and "Cobitis taenia".

In order to address the main issues in the area towards an improved ecological and conservation status, the project measures were to obtain more natural hydrological conditions and more varied physical conditions, to decrease the availability of nutrients, to decrease the biotope area and to apply good management practices in the restored areas.

Monitoring surveys and results

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Monitoring of fish, bed fauna, physical conditions of the watercourse and birds has been conducted before the project start to ensure there is background registrations available to compare with the monitoring after the project start that will take place in 2014. Nitrogen levels and habitat types are also to be monitored

Expected results: (1) New wetlands of 350 hectares, (2) reduction of nitrogen load to Odense Fjord of approx. 60 tonnes of nitrogen a year, a (3) re-meandered watercourse stretch of approx. 10 km of the Tiver Odense, (4) grazing agreements for 156 hectares along the river, (5) grazing agreements for approx. 51 hectares along the fjord, (6) management plans for coastal meadows along the fjord and management plans for areas along the river, (7) improvements in relation to favourable conservation status for Habitat species and Habitat nature types, (8) information boards, (9) observation tower for the public.

Lessons learnt

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- Good management practices - Exchange of experience between Denmark and Germany about the Thick-shelled river mussel


Image gallery


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Catchment and subcatchment



Site

Name
WFD water body codes
WFD (national) typology Intertidal, fjord
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 No
Invasive species present No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
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Average bankfull channel width (m)
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Average bankfull channel depth (m)
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Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

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Project started
Works started
Works completed
Project completed
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Total cost (k€)
Benefit to cost ratio
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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

Mitigation of a pressure
Hydromorphology
Biology
Physico-chemical
Other reasons for the project


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

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

Biological quality elements

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

Physico-chemical quality elements

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Any other monitoring, e.g. social, economic

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



Additional documents and videos


Additional links and references

Link Description
http://www.naturstyrelsen.dk/Naturbeskyttelse/Naturprojekter/Projekter/Fyn/OdenseAa/LIFE/REGAIN.htm Naturstyrelsen (2011). EU-LIFE project at River Odense and Odense Fjord - REGAIN
http://www.naturstyrelsen.dk/Naturbeskyttelse/Naturprojekter/Projekter/Fyn/OdenseAa/Aa/ Naturstyrelsen (2011). Odense River and Wolves Pelvis - the restoration and wetlands
http://www.naturstyrelsen.dk/NR/rdonlyres/A4087E6B-703B-45B6-AB17-B57061048C63/123937/Laymansreport Odense aa final trykkeklar.pdf REGAIN Skov og Naturstyrelsen Fyn 2010. Laymans Report
http://www.ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=search.dspPage&n proj id=2650&docType=pdf Regain - Regional Actions to Improve Nature in River Odense and Odense Fjord

Supplementary Information

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