Case study:Austria Upper Mur - River widening Lässer Au (LIFE+ (LIFE+ 08 NAT A 614) Inner-Alpine river basin management – Upper River Mur - murerleben II 2010-2015)

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Location: 47° 12' 9.04" N, 14° 50' 43.01" E

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Project overview

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Status	Complete
Project web site	http://www.murerleben.at/index.asp?pg_nr=60460&lang=en
Themes	Environmental flows and water resources, Habitat and biodiversity, Hydromorphology
Country	Austria
Main contact forename	Jörg
Main contact surname	Raderbauer
Main contact user ID	User:9984
Contact organisation	freiland Environmental Consulting Civil Engineers Ltd.
Contact organisation web site	http://www.freiland.at
Partner organisations	Office of the Styrian Government - Department 14 Watermanagement, resources and sustainability
Parent multi-site project	Austria Upper Mur - LIFE+ (LIFE+ 08 NAT A 614) „Inner-Alpine river basin management – Upper River Mur - murerleben II" 2010-2015
This is a parent project encompassing the following projects	No

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Project summary

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One of the goals of the Upper Mur is the recovery of habitats, which went lost to a large extent through the regulation of the Mur. The widening Lässer Au therefore aims - together with the measures implemented in Weyern and Apfelberg - at providing a contiguous, rich structured water course and alluvial areas.

For the dynamic development of the river Mur, the existing bank protection has been removed on the left bank and a 900 meter long structured side-arm with two inflow areas has been created. In addition, amphibian basins were built with a total area of more than 4,000 m² and 8 ha of alluvial forest areas have been secured or re-initiated.

In the Lässer Au riparian zones with deadwood from rhizomes were designed. Deadwood in the water not only increases the biodiversity of small animals in the water, but also is of use for the fish, as they discover valuable habitats between the branches. Through the implementation of new measures in the context of the first LIFE project large contiguous water courses and alluvial forests are created or preserved. Especially species, which require different living conditions depending on the season or their development, benefit from the newly created habitats.

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2013 River widening Lässer Au (LIFE+ (LIFE+ 08 NAT A 614) „Inner-Alpine river basin management – Upper River Mur - murerleben II" 2010-2015) © freiland - Christine Konradi

2013 River widening Lässer Au (LIFE+ (LIFE+ 08 NAT A 614) „Inner-Alpine river basin management – Upper River Mur - murerleben II" 2010-2015) © zepp-cam

Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present 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