Difference between revisions of "Case study:Retoration of Grobruelva"

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|Name=Grobruelva
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|WFD water body code=009-170-R
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|WFD water body name=Åro watercourse
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|Heavily modified water body=No
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|Protected species present=No
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|Invasive species present=No
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}}
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{{Project background
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|Project started=2017/08/01
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|Project completed=2020/01/01
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|Total1 cost=300
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|Funding sources=Land owners, municipality and Norwegian Environmental Agency
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|Investigation and design Lead organisation=Vannområdet Indre Oslofjord Vest
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|Investigation and design Other contact forename=Ingvild
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|Investigation and design Other contact surname=Tandberg
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|Stakeholder engagement Lead organisation=Vannområdet
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|Stakeholder engagement Other contact forename=Ingvild
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|Stakeholder engagement Other contact surname=Tandberg
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|Works and supervision Lead organisation=Vannområdet
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|Works and supervision Other contact forename=Ingvild
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|Works and supervision Other contact surname=Tandberg
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Revision as of 22:28, 13 January 2020

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Project overview

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Status In progress
Project web site
Themes
Country Norway
Main contact forename Ingvild
Main contact surname Tandberg
Main contact user ID
Contact organisation Vannområde Indre Oslofjord Vest
Contact organisation web site http://https://www.vannportalen.no/vannregioner/glomma/vannomrader-glomma/indre-oslofjord-vest/
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
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Project summary

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This project aimes to improve the habitat conditions of fast-growing sea trout (salmo trutta) in the Grobruelva river in the Bømlo municipality (Vestland). They are impaired by re-routing of side arms, regulating of the main channel and pollution (streets and agricuture). Habitat improving measures are planned, but not conducted yet.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment



Site

Name Grobruelva
WFD water body codes 009-170-R
WFD (national) typology
WFD water body name Åro watercourse
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

Reach length directly affected (m)
Project started 2017/08/01
Works started
Works completed
Project completed 2020/01/01
Total cost category
Total cost (k€) 300
300 k€
300,000 €
Benefit to cost ratio
Funding sources Land owners, municipality and Norwegian Environmental Agency

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design Vannområdet Indre Oslofjord Vest Ingvild Tandberg
Stakeholder engagement and communication Vannområdet Ingvild Tandberg
Works and works supervision Vannområdet Ingvild Tandberg
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

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

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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