Case study:Conservation strategies for forest and wild river in Gesaeuse: the Johnsbach Beck restoration

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Location: 47° 34' 37.01" N, 14° 35' 20.30" E

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Project overview

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Status	Complete
Project web site	http://www.nationalpark.co.at/nationalpark/de/life.php?navid=102
Themes	Habitat and biodiversity, Hydromorphology, Monitoring, Social benefits
Country	Austria
Main contact forename	Daniel
Main contact surname	Kreiner
Main contact user ID
Contact organisation	Gesäuse National Park
Contact organisation web site	http://www.nationalpark.co.at/nationalpark/de/life.php
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The River Johnsbach, a tributary to the River Enns, was heavily regulated and deprived of biological and hydromorphological diversity. Of particular concern was the inability of fishes to overcome the high concrete structures and the spawning habitat shortage all along the river corridor. Part of the LIFE+ multi-site project for the restoration of the River Enns and its surrounding ecosystems was delivered in the Johnsbach Brook. The works targeted a stretch of several kilometres, were bank reinforcement structures were take-off and the mouth of the river was ecologically enhanced (i.e. gravel banks, etc.). Restoration outcomes are positive overall. In particular, fish are now able to migrate and greater habitat diversity significantly supports in-site species populations (i.e. Common sandpiper (Actitis hypoleucos)). However there is still a technical problem related with the adjustment of the river slope and the high steps imposed by old sills. There is a deficit of dynamic gravel resulting from the long-lasting excavation in the Johnsbach valle. Overtime, changing erosion processes as well as variable flooding will continually modify the site while the river network is regaining its natural functionality.

The River Restoration Centre would like to thank Daniel Kreiner from the Gesäuse National Park for providing the information and photographs for this case study.

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Danube River basin Enns Subcatchment River name Enns Area category Area (km2) 60846,084 km² <br />608,400 ha <br /> Maximum altitude category Maximum altitude (m) 27112,711 m <br />2.711 km <br />271,100 cm <br /> Dominant geology Central Eastern Alps Ecoregion Alps Dominant land cover Waterbody ID Other case studies in this subcatchment: Conservation strategies for forest and wild river in Gesaeuse: the River Enns restoration, LIFE IP IRIS Enns Mandling Restoration Site Edit site Name WFD water body codes WFD (national) typology WFD water body name River Johnsbach Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Austria - Nationalpark Local/regional site designations Natura 2000, National Park Protected species present Yes Invasive species present Yes Species of interest Alcedo atthis, Bombina variegata, Bonasa bonasia, Cottus gobio, Cypripedium calceolus, Dendrocopos leucotos, Eudontomyzon spp., Ficedula parva, Leuciscus souffia, Lutra lutra, Picoides tridactylus, Picus canus, Rosalia alpina, Tetrao tetrix tetrix, Tetrao urogallus 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 2005/02/01 Works started Works completed Project completed 2011/08/01 Total cost category Total cost (k€) 2,363.2062,363.206 k€ <br />2,363,206 € <br /> Benefit to cost ratio Funding sources EU LIFE III 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 Supplementary funding information Total budget 2,363,206.00 € EU contribution 1,181,603.00 € Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Regulation of water courses, intensive forestry practices, tourism, traffic Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bank reinforcement structures removed, Gravel banks reintroduced 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 http://www.nationalpark.co.at/nationalpark/de/life-gewaesser-johnsbach.php Gesäuse National Park (2008) Revitalisierung "Johnsbach" 2006-2010 (Partnerprojekt) http://http://www.nationalpark.co.at/nationalpark/de/life.ph Life-Project: Conservation strategies for forest and wild river in Gesaeuse Supplementary Information Edit Supplementary Information