Case study:Habitat measures in Strynevassdraget

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Location: 61° 54' 56.76" N, 6° 45' 50.10" E

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - agriculture, Monitoring
Country	Norway
Main contact forename	Anders Jarle
Main contact surname	Muldsvor
Main contact user ID
Contact organisation	The Norwegian Water Resources and Energy Directorate (NVE)
Contact organisation web site	http://www.nve.no
Partner organisations	Stryn municipality, Stryn elveeigarlag, County Governor of Vestland, Vestland County Council, The Norwegian Public Roads Administration, The Norwegian Coastal Administration, Norwegian Food Safety Authority, Utmarksressurs AS
Parent multi-site project
This is a parent project encompassing the following projects	No

Reconnection of an oxbow lake under a gravel road along the Strynevassdraget. Source: Ole Dag Auflem

Project summary

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The measures carried out were based on a management plan for the River Basin District Vestlandet (period: 2010-2015) and initiated through the proposal "Heilskapeleg tiltaksplan for Strynevassdraget" prepared by Utmarksressurs AS. The management plan was drawn up to improve the water quality in the watercourse according to requirements in the Water Management Regulations (Vannfirskriften). The environmental objectives for Strynevassdraget were to improve the ecological condition in the main river, which was considered deficient.

A project lead by NVE (Norwegian Water Resources and Energy Directorate), in collaboration with Stryn Elveeigarlag and Stryn municipality, was started in 2016, when the highest priority measures were implemented. NVE finalized these measures in the fall of 2017. The measures were aimed at increasing the ecological value of the Strynevassdraget as a waterbody, by opening old streams and ox-bow lakes, creating shelters and habitats for fish, insects and ducks, in both the riverbed and along the cultivated land by the riverbanks.

The measures included:

• Opening of old streams and ox-bow lakes

• Habitat improvement measures

• Removal of migration berries for fish

Monitoring surveys and results

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Awaiting upcoming report with survey results.

Lessons learnt

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Image gallery

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name Stryneelva WFD water body codes 088-29-R and 088-13-R WFD (national) typology RWL2241 and RWL2811 WFD water body name Stryneelva and Sideelver til Stryneelva Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations National Salmon Watercourse Protected species present Yes Invasive species present No Species of interest Salmon and Sea-trout Dominant hydrology Dominant substrate River corridor land use Intensive agriculture (arable), Urban 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 2010/01/01 Works started Works completed Project completed 2018/01/01 Total cost category Total cost (k€) 119119 k€ <br />119,000 € <br /> Benefit to cost ratio Funding sources The Norwegian Water Resources and Energy Directorate (NVE), Stryn municipality, Stryn elveeigarlag 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 Barriers to fish migration, Land drainage, Riparian development, Flood risk management Hydromorphology Biology Invertebrates Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications habitat improvements, Reopening of side channels, Removal of fish barriers 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 Fish Yes Yes No No No Awaiting results Invertebrates Yes No No No No 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 http://www.vannportalen.no/globalassets/vannregioner/rogaland/rogaland---dokumenter/publikasjoner/rapporter/heilskapleg-tiltaksplan-for-strynevassdraget.pdf Measures plan http://www.facebook.com/stryn.kommune/videos/strynevassdraget-er-blitt-rikare-p%C3%A5-b%C3%A5de-fugl-og-fisk/1237244539731489/ Video Supplementary Information Edit Supplementary Information