Case study:Environmental design Mandalsvassdraget

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Location: 58° 14' 40.24" N, 7° 30' 25.20" E

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Hydropower, Hydromorphology
Country	Norway
Main contact forename	Aleksander
Main contact surname	Andersen
Main contact user ID
Contact organisation	Agder Energi
Contact organisation web site	http://https://www.ae.no/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Removal of weirs in the Mandalselva river in connection to efforts to make earlier unproductive sones accessible as spawning and aufwuchs areas for salmon. Foto: Agder Energi

Project summary

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The Environmental Design project is among Norways most comprehensive and is conducted by Agder Energi together with the Norwegian Institute for Nature Research NINA, Sintef and Norce Research.

Monitoring surveys and results

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They are expected to be published soon.

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name 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 Protected species present Invasive species present 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 Edit project background Reach length directly affected (m) Project started 01.10.2014 Works started Works completed 2018/03/01 Project completed Total cost category 100 - 500 k€ Total cost (k€) 394394 k€ <br />394,000 € <br /> Benefit to cost ratio Funding sources Agder Energi 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit 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 Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information