Difference between revisions of "Case study:Biotop and flood measures in the Mykle river (Mykleelva) and Vanebu river (Vanebuelva)"

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|Main contact forename=Steinar
 
|Main contact forename=Steinar
 
|Main contact surname=Bergan Tronhus
 
|Main contact surname=Bergan Tronhus
−
|Contact organisation=Siljan - Farris vannområde
+
|Contact organisation=Sub-district (Vannområde) Siljan - Farris
 
|Contact organisation url=http://www.vannportalen.no/vannregioner/vestviken/vannomraader/siljan-farris/
 
|Contact organisation url=http://www.vannportalen.no/vannregioner/vestviken/vannomraader/siljan-farris/
 
|Partner organisations=Skagerak Kraft AS, University of South-Eastern Norway (USN)
 
|Partner organisations=Skagerak Kraft AS, University of South-Eastern Norway (USN)

Revision as of 11:26, 4 December 2019

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Location: 59° 24' 1", 9° 42' 5"
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Project overview

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Status Complete
Project web site http://www.vannportalen.no/globalassets/vannregioner/vest-viken/vest-viken---dokumenter/vannomrader-i-vest-viken/siljan-farris/dokumenter/fagrapporter/biotop--og-flomtiltak-i-mykleelva-og-vanebuelva_rapport.pdf
Themes Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Hydropower, Hydromorphology
Country Norway
Main contact forename Steinar
Main contact surname Bergan Tronhus
Main contact user ID
Contact organisation Sub-district (Vannområde) Siljan - Farris
Contact organisation web site http://http://www.vannportalen.no/vannregioner/vestviken/vannomraader/siljan-farris/
Partner organisations Skagerak Kraft AS, University of South-Eastern Norway (USN)
Parent multi-site project
This is a parent project
encompassing the following
projects 		No
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Project summary

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The reason for initiating measures is because the water bodies are regulated and without minimum water supply. Heavily Modified Water Body (HMWB). Thalwegs and ponds were made to ensure a consistent aquatic ecosystem. A new road and bridge across the river were also built as flood measures.

Monitoring surveys and results

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http://www.vannportalen.no/globalassets/vannregioner/vest-viken/vest-viken---dokumenter/vannomrader-i-vest-viken/siljan-farris/dokumenter/fagrapporter/biotop--og-flomtiltak-i-mykleelva-og-vanebuelva_rapport.pdf

Lessons learnt

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Catchment and subcatchment



Site

Name Mykleelva and Vanebuelva
WFD water body codes 015-219-R and 015-328-R
WFD (national) typology REL3221
WFD water body name Mykleelva and Vanebuelva (Vanebuvann - Hogstad)
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body Yes
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest Salmonids
Dominant hydrology Artificially regulated
Dominant substrate Cobble
River corridor land use Coniferous woodland (semi natural)
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 2011/01/01
Works started
Works completed
Project completed 2019/01/01
Total cost category
Total cost (k€) 20
20 k€
20,000 €
Benefit to cost ratio
Funding sources Skagerak Kraft AS

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 Hydropower, Barriers to fish migration
Hydromorphology Continuity for organisms, Freshwater flow regime, Quantity & dynamics of flow
Biology Fish, Invertebrates
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Creation of fish refuge areas, Construction of dams, Providing of continuity, Creation of low flow channel, Boulder restoration
Floodplain / River corridor
Planform / Channel pattern Reconnection of water bodies to the river
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
http://openarchive.usn.no/usn-xmlui/handle/11250/2439188 Measures proposal
http://www.vannportalen.no/globalassets/vannregioner/vest-viken/vest-viken---dokumenter/vannomrader-i-vest-viken/siljan-farris/dokumenter/fagrapporter/biotop--og-flomtiltak-i-mykleelva-og-vanebuelva rapport.pdf Report

Supplementary Information

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