Case study:Skårhultsdammen bypass channel at River Knipån

0.00

(0 votes)

To discuss or comment on this case study, please use the discussion page.

Location: 57° 56' 39.88" N, 14° 4' 58.60" E

Edit location

Loading map...

{"format":"googlemaps3","type":"HYBRID","minzoom":false,"maxzoom":false,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":50,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"... further results","default":"","import-annotation":false,"width":"auto","height":"400px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"visitedicon":"","wmsoverlay":false,"zoom":14,"layers":[],"controls":["pan","zoom","type","scale","streetview","rotate"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"cluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[""],"searchmarkers":"","fullscreen":false,"scrollwheelzoom":false,"showtitle":false,"hidenamespace":true,"template":"Location map popup","userparam":"","activeicon":"","pagelabel":false,"ajaxcoordproperty":"","ajaxquery":"","locations":[{"text":"\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Title:\u003C/b\u003E Sk\u00e5rhultsdammen bypass channel at River Knip\u00e5n\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003ECountry:\u003C/b\u003E \u003Ca href=\"/wiki/index.php?title=Sweden\" title=\"Sweden\"\u003ESweden\u003C/a\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Status:\u003C/b\u003E Complete\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EThemes:\u003C/b\u003E Hydropower\n\u003C/p\u003E\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E","title":"Sk\u00e5rhultsdammen bypass channel at River Knip\u00e5n","link":"","lat":57.944410794959,"lon":14.082944838501,"icon":"/wiki/images/a/af/Red_marker.png"}]}

Left click to look around in the map, and use the wheel of your mouse to zoom in and out.

Project overview

Edit project overview

Status	Complete
Project web site	http://projektwebbar.lansstyrelsen.se/vattern/Sv/besoksmal-vatterbackar/knipan/Pages/Skarhultsdammen.aspx
Themes	Fisheries, Habitat and biodiversity, Hydropower
Country	Sweden
Main contact forename	Ingemar
Main contact surname	Bergbom
Main contact user ID	User:Arolam
Contact organisation	Länsstyrelsen i Jönköpings län
Contact organisation web site	http://projektwebbar.lansstyrelsen.se/vattern/Sv/besoksmal-vatterbackar/knipan/Pages/Skarhultsdammen.aspx
Partner organisations
Parent multi-site project	Case_study:Restoration of river Knipån
This is a parent project encompassing the following projects	No

Constructed new strem channel (photo. Maria Arola)

Project summary

Edit project overview to modify the project summary.

Skårhultsdammen pond was built in 1920th century and was used as water regulation for Kvarnekulla power plant. Local farmers were using water from Skårhultsdammen for irrigation which made water level downstreams unnatural low. There were also other negative effects of the pond for the river. One of the biggest problems for the ecology of the Knipån was the outlet of the pond which made the migration difficult for fish like trout and greyling. Also coarse fish which thrivdes in the pond had negative effects for migrating fish.

In 2009 and 2010 started the project as the aim of improving ecological and hydromorphological conditions of the River Knipån. The longest bypass channel in Sweden was constructed for making fish migration possible and making hydromorpological condtitions of the water closer to natural state. All and all 55 000 m2 sediment was taken away which increased the water volyme from 25 000 m2 to 80 000 m2. Total cost of the restoration was about 230 000 euros.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.

Image gallery

Edit Image gallery

Meandering of the new stream (photo. Maria Arola)

Constructed new stream (stones and gravel added) (photo. Maria Arola)

Confluence of old stream and new strem (photo. Maria Arola)

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Habo River basin Knipån Subcatchment River name Knipån Area category Area (km2) Maximum altitude category Maximum altitude (m) Dominant geology Ecoregion Fenno-Scandian Shield Dominant land cover Waterbody ID Other case studies in this subcatchment: Kvarnekulla nature like bypass channel at River Knipån Site Edit site Name Skårhultsdammen pond WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Bypass channel 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 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 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