Case study:Austria cross-border section - Monitoring sediment transport and Habitat modelling (ETZ-Project “DraMurCi” 2009-2013)

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Location: 46° 43' 17", 15° 49' 33"
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Project overview

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Status Complete
Project web site http://www.dramurci.eu/page/
Themes Environmental flows and water resources, Habitat and biodiversity, Hydromorphology
Country Austria, Slovenia
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
This is a parent project
encompassing the following
projects
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Project summary

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The sediment transport monitoring made in this project was the first monitoring of this kind in Austria and was as successful as it was expected to be. “At the border section of the Mur River between Austria and Slovenia, systematic river training and hydroelectric power plants have led to a channel incision with considerable ecological and technical consequences. A sediment transport model predicted further incision if no countermeasures are implemented. The thin gravel layer (≈0.5 m) poses the threat of a river-bed break-through, calling for urgent action. In a Basic Water Management Concept, several types of ecologically oriented countermeasures have been proposed. Recently, one measure that combines self-initiated riverbank erosion with sediment input from a newly constructed side-arm has been implemented. To determine the success of the measure, we conducted a detailed survey along with particle tracking by telemetry. The results show the anticipated response. So far the Mur River showed the intended response to the measures with respect to self-initiated bank erosion and distribution of the inserted gravel. The introduced monitoring program proved to be suitable for the assessment of the measures.” (Abstract: 4th ECRR Conference on River Restoration Italy, Venice S. Servolo Island 16-21 June 2008 - Institute of Water agement, Hydrology and Hydraulic Engineering, Department of Water, Atmosphere and Environment, University of Natural Resources and Applied Life Sciences, Vienna)

To identify the major impairments for the ecological status of waters and aquatic habitats at Drava and Mur, a scientific monitoring of habitats and species was carried out. Particular attention was paid to the wolf spider Arctosa cinerea, the beetle species Cicindela hybrida, and the bird species Actitis hypoleucos and Charadrius dubius. In the area of Bad Radkersburg, Drauchenbach up to the border a fish-ecological evaluation has been conducted at the river Mur. In the area of the measure Gosdorf I, an Interreg IIIa (2002-2008) project, a detailed monitoring and habitat modeling as well as an investigation of habitat types and species, visitor pressure and neophytes was done. The pre-and post-monitoring-results show a remarkable development of existing and new habitats of the studied protected resources. The dynamic river engineering projects have significantly promoted the development of all habitats concerned and a substantial improvement of habitats and animals has been documented.

Monitoring surveys and results

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Catchment and subcatchment



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
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Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
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Project background

Reach length directly affected (m)
Project started 2009/01/01
Works started
Works completed
Project completed 2013/01/01
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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

Mitigation of a pressure Hydropower
Hydromorphology Width & depth variation, Continuity of sediment transport, Continuity for organisms
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Self-initiated bank erosion by sediment input
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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Physico-chemical quality elements

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Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
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Monitoring documents



Additional documents and videos


Additional links and references

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Supplementary Information

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