Case study:Conservation strategies for forest and wild river in Gesaeuse: the River Enns restoration

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Location: 47° 34' 20.63" N, 14° 20' 12.45" 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, Land use management - forestry, Monitoring
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
Partner organisations
This is a parent project encompassing the following projects	Conservation strategies for forest and wild river in Gesaeuse: the Johnsbach Beck restoration

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Project summary

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The natural habitats in and beside the River Enns as well as the Johnsbach brook improved significantly with the implementation of this LIFE+ funded project, delivered by the National Park in the River Enns and its surrounding ecosystems. Restoration actions took place in multiple sites to re-establish an ecologically functioning wetland along the water courses and tributaries, with focus in connectivity (transversal and longitudinal) and landscape diversity.

Works in the rivers Enns and Palten included the creation of a new estuary in their confluence. Bank reinforcement structures along 500 m of the River Enns were replaced by typical riverine structures (i.e. gravel banks, bank erosion areas, piles of deadwood) which are developing. A new large pond for amphibians was completely cut-off from both rivers to prevent the immigration of fishes. Common frogs (“Rana temporaria”) and European toads (“Bufo bufo”) breed here.

Another target was the re-naturalisation of the floodplain forest for enhancing longitudinal connectivity of the river Enns. 306 ha of spruce dominated forests are now a natural mixed forest. Restoration of the River Enns and its surrounding ecosystems are also in line with a long-term strategy to protect special habitats and endangered species (i.e. Black woodpecker (“Dryocopus martius”), Eurasian pygmy owl (“Glaucidium passerinum) and the Rosalia longicorn (Rosalia alpina).

With focus on mountain pastures and species (i.e. black grouse (Tetrao tetrix), yellow bellied toad (“Bombina variegate”), etc.), the regulation of grazing intensity and access to drinking water in within the project area were also a priority.

A monitoring programme was established for the assessment of restoration outcomes. Increasing public awareness and dissemination of results are supported by public activities. For instance, specially trained wardens are to guide visitors and provide information on restoration outcomes in terms of habitats and landscape diversity and services. In addition, a thematic trail with interactive information facilities is in place.

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 Johnsbach Beck restoration, LIFE IP IRIS Enns Mandling Restoration Site Edit site Name WFD water body codes WFD (national) typology WFD water body name River Enns Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation Local/regional site designations National Park, Natura 2000 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) 201201 m³/s <br />201,000 l/s <br /> 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 2005/08/01 Works started Works completed Project completed 2011/02/01 Total cost category Total cost (k€) 2,363.206 2,363.206 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 Construction of gravel banks, Bank restoration, Creation of pools and riffles, Bank stabilization and erosion protection, Creation of pools and riffles Floodplain / River corridor Construction a new pond, Develop riparian forest Planform / Channel pattern Other Creation of a new estuary Non-structural measures Management interventions Monitoring strategy Social measures (incl. engagement) Educating the community on environmental protection and promoting environmentally-friendly behaviour Other Popularization of the project 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.life-enns.at/projekt en.php LIFE Enns Fluss Landschaft Enns http://www.nationalpark.co.at/nationalpark/de/life.php Life-Project: Conservation strategies for forest and wild river in Gesaeuse http://www.nationalpark.co.at/nationalpark/de/life-gewaesser-ennsleitlinie.php Gewässer-Auen-Leitlinie „Enns“ (Partnerprojekt) Supplementary Information Edit Supplementary Information 1. Nationalpark Gesäuse GmbH (2010) Laienbericht des Projektes 2. Nationalpark Gesäuse GmbH (2011) Project's Final Report