Case study:Restoration of the Roer for species migration
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- 1 Project overview
- 2 Image gallery
- 3 Catchment and subcatchment
- 4 Site
- 5 Project background
- 6 Reasons for river restoration
- 7 Measures
- 8 Monitoring
- 9 Additional documents and videos
- 10 Additional links and references
- 11 Supplementary Information
|Project web site||http://www.vismigratieroer.nl|
|Themes||Fisheries, Habitat and biodiversity|
|Main contact forename||Peter|
|Main contact surname||Brouwers|
|Main contact user ID|
|Contact organisation||Waterschap Roer en Overmaas|
|Contact organisation web site||http://www.overmaas.nl|
|Parent multi-site project|
| This is a parent project
encompassing the following
The Roer river forms a potential habitat for fish species that migrate between the Meuse and the Roer. The Dutch section of the Roer also forms a route for fish that migrate between the North Sea and the Meuse to their spawning.
The main aim of the project was to facilitate improved habitat access and migratory conditions in the Roer Delta for Atlantic salmon (Salmo salar) and other Annex II species, namely asp (Aspius aspius), bullhead (Cottus gobio), river lamprey (Lampetra fluviatilis), brook lamprey (Lampetra planeri), sea lamprey (Petromyzon marinus), bitterling (Rhodeus sericeus susbsp. amarus)and weatherfish (Misgurnis fossilis).
A new fish ladder was built in Roermond and the existing fish ladder at Hambeek was improved to increase its effectiveness. These two structures overcome the last remaining obstacles for fish migration between the river Meuse and the Dutch part of the river Roer, thus opening up an improved migratory route for fish from the North Sea to Germany.
Monitoring has confirmed that three of the species targeted by the project (salmon, sea lamprey and European bullhead are using the new Roermond fish ladder. Salmon and sea lamprey have also been recorded using the improved Hambeek migratory facilities and ongoing monitoring by the beneficiary will continue to measure the project’s long term impact on fish populations in the Roer.
Monitoring surveys and results
Catchment and subcatchment
Cost for project phases
Reasons for river restoration
Hydromorphological quality elements
Biological quality elements
Physico-chemical quality elements
Additional documents and videos