Case study:Habitat measures Hollundbekken

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Location: 59° 47' 42.11" N, 5° 10' 54.37" E

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Project overview

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Status	In progress
Project web site
Themes	Fisheries, Habitat and biodiversity, Hydromorphology
Country	Norway
Main contact forename	Marius
Main contact surname	Kambestad
Main contact user ID
Contact organisation	Bømlo municipality, Rådgivende Biologer AS
Contact organisation web site	http://https://www.radgivende-biologer.no
Partner organisations	Bømlo hunting and fishing association
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Bømlo municipality has impacted Hollund creek in the past and initiated this project to improve the habitat conditions for fish by re-establishing spawning areas for trout. This is done in cooperation with the Bømlo hunting and fishing association. Concrete restoration measures are:

Monitoring surveys and results

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This project is still in progress. A success evaluation is planned (

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name WFD water body codes 043-22224-L WFD (national) typology WFD water body name Storavatnet 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 Edit project background Reach length directly affected (m) Project started 01.09.2017 Works started Works completed Project completed 2020/12/31 Total cost category Total cost (k€) Benefit to cost ratio Funding sources Bømlo municipality Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Bømlo municipality Stakeholder engagement and communication Bømlo municipality Works and works supervision Bømlo municipality Post-project management and maintenance Bømlo municipality Monitoring Rådgivende Biologer AS Marius Kambestad Reasons for river restoration Edit reasons for restoration Mitigation of a pressure culverting of the creek, sedimentation (with fine sediments) Hydromorphology reduced connectivity (reduced migration possibilities) and morphological conditions Biology reduced number of fish Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications introduction of spawning substrate and larger stones in the creek Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) project coonducted in coopperation with the local hunting and fishing association 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: Abundance No No No No 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 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