Case study:Restoration of Enningdalsälv River

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Location: 58° 52' 58.97" N, 11° 32' 17.37" E
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Project overview

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Status Complete
Project web site http://projektwebbar.lansstyrelsen.se/projektenningdalsalven/Sv/Pages/default.aspx
Themes Fisheries, Habitat and biodiversity, Hydromorphology
Country Sweden
Main contact forename Bäckstrand
Main contact surname Andreas
Main contact user ID
Contact organisation Tanums kommun & Enningdalsälvens vattenråd
Contact organisation web site http://www.enningdalselven.com
Partner organisations
This is a parent project
encompassing the following
projects
Enningdalsälv River_after restoration (photo: Langevallsalven)

Project summary

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Monitoring surveys and results

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Lessons learnt

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Image gallery


Enningdalsälv River_after restoration
Enningdalsälv River_after restoration (photo: Svingen)
Enningdalsälv River_bifore restoration (photo: Svingen)
Enningdalsälv River_before restoration (photo: Svingen)
Enningdalsälv River_after restoration (photo: Långevallsälven)
Enningdalsälv River_before restoration (photo: Långevallsälven)
Enningdalsälv River_during the restoration works (photo: )


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Catchment and subcatchment

Catchment

River basin district
River basin Enningdal River Basin

Subcatchment

River name Enningdal River
Area category 100 - 1000 km²
Area (km2) 782 km²78,200 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology Organic (i.e. Peat)
Ecoregion Fenno-Scandian Shield
Dominant land cover Woodland
Waterbody ID



Site

Name Catchment of River Enningdalsälven
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 Woodland
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

Reach length directly affected (m)
Project started 2009/06/01
Works started
Works completed 2011/06/01
Project completed
Total cost category 100 - 500 k€
Total cost (k€) 470 k€470,000 € <br />
Benefit to cost ratio
Funding sources European Regional Development Fund, Västra Götalands län, NINA samt Direktoratet for naturforvaltning, Norska IR midler

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 Width & depth variation, Substrate conditions
Biology Fish: Abundance, Fish: Species composition, Invertebrates: Abundance
Physico-chemical pH, Acid neutralising capacity
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Building of submerged weirs and pits, Re-introducing stones, Introduction of gravel, Creation of fish passes
Floodplain / River corridor
Planform / Channel pattern
Other Liming
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
Width & depth variation Awaiting results
Substrate conditions Awaiting results

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Fish: Abundance Awaiting results
Fish: Species composition Awaiting results
Invertebrates: Abundance Awaiting results

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
pH
Acid neutralising capacity

Any other monitoring, e.g. social, economic

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


Monitoring documents



Additional documents and videos


Additional links and references

Link Description

Supplementary Information

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