Case study:Rehabilitation of the river Segeråga

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Location: 66° 43' 7.54" N, 13° 17' 6.63" E

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Project overview

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Image gallery

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Removing inorganic material (sludge/fine sand. Photo: Kjetil Hansen, Rødøy municipality

After removal of the inorganic material (sludge/fine sand), reinfoorcement of river bank and gravel for spawning grounds. Photo: Kristin B. Klausen, local watercoordinator.

Excavation of sediment ponds in the upper part of the river. Photo: Kjetil Hansen, Rødøy municipality

Sediment pond. Photo: Kjetil Hansen, Rødøy municipality

Excavation of sediment ponds in the middle part of the river. Photo: Kjetil Hansen, Rødøy municipality

Sediment ponds in the middle part of the river after measure. Photo: Kristin B. Klausen, local watercoordinator.

Construction of fishing ladder. Photo: Kjetil Hansen, Rødøy municipality

Fish ladder after measure. Photo: Kristin B. Klausen, local watercoordinator.

Digging of ditches and reinforcement of ditches. Photo: Kjetil Hansen, Rødøy municipality

After digging of ditches and reinforcement of ditches. Photo: Kristin B. Klausen, local watercoordinator.

Gravel for spawning grounds. Photo: Kristin B. Klausen, local watercoordinator.

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 Works started Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources 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 Substrate conditions Yes No Yes No No Awaiting results Width & depth variation Yes No Yes No No Awaiting results Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Fish: Abundance Yes No No Yes No Awaiting results Fish: Age structure Yes No No Yes No Awaiting results Invertebrates: Diversity Yes No No Yes No Awaiting results Invertebrates: Abundance Yes No No Yes No Awaiting results 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 Nutrient concentrations Yes No No Yes No Awaiting results PH Yes No No Yes No Awaiting results 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 http://https://brage.nina.no/nina-xmlui/handle/11250/2446580 Plan for rehabilitation of the river http://https://brage.nina.no/nina-xmlui/handle/11250/2436896 Fish biological survey http://https://niva.brage.unit.no/niva-xmlui/handle/11250/2478427 Survey of physico-chemical quality elements and biology Supplementary Information Edit Supplementary Information