Case study:Gammelelva: Difference between revisions

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{{Case study status
{{Case study status}}
|Approval status=Draft
{{Location}}
}}
{{Project overview}}
{{Location
|Location=63.2176565, 10.306862000000023
}}
{{Project overview
|Status=Complete
|Themes=Habitat and biodiversity
|Country=Norway
|Main contact forename=Per Ivar
|Main contact surname=Bergan
|Contact organisation=Governor of Trøndelag
|Contact organisation url=www.fylkesmannen.no/Trondelag
|Partner organisations=Sweco
|Multi-site=No
|Project summary=This restoration project is part of a management plan for an ox-bow lake protected as a nature reserve in 1993. The lake is under pressure from new infrastructure and runoff from nearby agricultural land. The main pressure was
eutrophication. An overall aim for the project is to restore ain reopen the lake and open water to protect and secure the future survival of rare forest type and animal life. This imply to extend the survival of thi nature type, that naturally is a dynamic habitat and will eventuelly dry out. Due to pressure on natural river systems the establishment of new ox-bow lakes is very limited. Ox-bow lake is a redlisted nature type (Norwegian Redlist). In 2012/2013 large quantities of sediments were excavated, and removed from Gammelelva. This resulted in more open water.
|Monitoring surveys and results=The status of the lake was monitored before the restoration: Area of open water (from airal photo 1947 - 2011). Status for species (plants, insects, zooplankton, amphibians, fish and birds) has been mapped. There are no spesific plans for further monitoring after restoration.
|Lessons learn=This project gave interesting experience from the practical side, in cooperation with the entrepreneur. The project was highly wanted from management authorities and involved partners. The local people are a bit more biased, due to rewetting and changes in the areas, and fair for less recreation values.
The output is partly successful, but the pressure from surrondings in combination with the natural prosesses is challenging, and the status of the oxbow-lake will still be changing. A need for continuous management to mainstain the habitat.
|Project title=Gammelelva
}}
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{{Case study subcatchment}}
{{Case study subcatchment}}
{{Site
{{Site}}
|Name=Gammelelva nature reserve
{{Project background}}
|Heavily modified water body=No
{{Motivations}}
|Protected species present=Yes
{{Measures}}
|Invasive species present=Yes
|Species=invasive lupin in near surrondings
|Dominant hydrology=oxbow-lake
|Dominant substrate=wetland
|River corridor land use=infrastructure, Intensive agriculture (arable),
}}
{{Project background
|Project started=2011
|Total1 cost=30000
|Funding sources=Environmental management authorities
|Investigation and design Lead organisation=Sweco
|Investigation and design Other contact forename=Per Ivar
|Investigation and design Other contact surname=Bergan
|Stakeholder engagement Lead organisation=Local farmers and landowners
|Works and supervision Lead organisation=Sweco
|Works and supervision Other contact forename=Per Ivar Bergan
|Post-project management and maintenance Lead organisation=Governor of Trondelag
|Post-project management and maintenance Other contact forename=Jan-Erik
|Post-project management and maintenance Other contact surname=Andersen
}}
{{Motivations
|Specific mitigation=Infrastructure delevopment, agriculture
|Hydromorphological quality elements=road and railway crossing the river
|Biological quality elements=euthropication, invasive species
|Physico-chemical quality elements=eutrophication
}}
{{Measures
|Floodplain / River corridor=Area of open water
}}
{{Hydromorphological quality elements header}}
{{Hydromorphological quality elements header}}
{{Hydromorphological quality element table row
{{Hydromorphological quality element table row
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{{Additional Documents end}}
{{Additional Documents end}}
{{Additional links and references header}}
{{Additional links and references header}}
{{Additional links and references
|Link=https://www.fylkesmannen.no/globalassets/utgatt/fm-sor-trondelag/dokument-fmst/miljo-og-klima/fagrapporter-natur-og-miljo/2015---4.-forvaltningsplan-for-gammelelva-naturreservat.pdf
|Description=Management plan for Gammelelva
}}
{{Additional links and references
|Link=https://www.artsdatabanken.no/
|Description=Redlisted species and nature types
}}
{{Additional links and references
|Link=https://lovdata.no/dokument/LF/forskrift/1993-05-07-404
|Description=Protection regulations for Gammelelva nature reserve
}}
{{Additional links and references footer}}
{{Additional links and references footer}}
{{Supplementary Information}}
{{Supplementary Information}}
{{Toggle content end}}
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Latest revision as of 11:11, 6 December 2019

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Catchment and subcatchment



Site

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Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
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Channel pattern/planform Yes Yes No Yes No Improvement

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Additional links and references

Link Description
http://https://www.fylkesmannen.no/globalassets/utgatt/fm-sor-trondelag/dokument-fmst/miljo-og-klima/fagrapporter-natur-og-miljo/2015---4.-forvaltningsplan-for-gammelelva-naturreservat.pdf Management plan for Gammelelva
http://https://www.artsdatabanken.no/ Redlisted species and nature types
http://https://lovdata.no/dokument/LF/forskrift/1993-05-07-404 Protection regulations for Gammelelva nature reserve

Supplementary Information

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