Difference between revisions of "Regelsbrunner Aue"

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=Regelsbrunner Aue =
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=Regelsbrunner Aue=
  
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<googlemap version="0.9" lat="48.129549" lon="16.663685" zoom="13" scale="yes" overview="yes" controls="large">
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<googlemap version="0.9" lat="48.1182047605209" lon="16.6906356811523" zoom="13" width="100%" height="400" scale="yes" overview="yes" toc="no" controls="large">
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(A) 48.11534, 16.645145
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(A) 48.1182047605209, 16.6906356811523</googlemap>  
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[[Side Channel]]
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</googlemap>
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<Forecasterlink type="getProjectInfoBox" code="21" />
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==Key features of the case study==
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Restore hydrological connectivity and ecological integrity between the river and its floodplains in a segment of the Austrian Danube
  
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{{forecasterTemplate
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'''Attention:''' '' The information presented below has been taken from Tockner et al.(1999)''<ref>K, TOCKNER,F. SCHIEMER, C. BAUMGARTNER, G. KUM, E. WEIGAND,
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|site_name=Regelsbrunner Aue
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I. ZWEIMU, LLER AND J.V. WARD (1999). THE DANUBE RESTORATION PROJECT: SPECIES DIVERSITY PATTERNS ACROSS CONNECTIVITY GRADIENTS IN THE FLOODPLAIN SYSTEM. REGULATED RIVERS: RESEARCH & MANAGEMENT 15: 245–258.</ref>
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|river_name=Danube
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|river_type_name=large slow-flowing river over sand/clay
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|country=AT
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|altitude=mid-altitude: 200 - 800 m
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|catchmentarea=very large: > 10000 km2
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|geology=Calcareous
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|latitude=48.11
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|longitude=16.69
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|natcode=AU
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|pressures=[[Morphological alterations]]<br>  [[Presence of downstream artificial barriers on the catchment scale]]<br>  [[Artificial barriers upstream from the site]]<br>  [[Artificial barriers downstream from the site]]<br>  [[Channelisation/Cross section alteration]]<br>
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|measures=[[Working with physical form and function of river and floodplains]]<br>  [[Reconnect and restore historic aquatic habitats]]<br>[[Changes in system operation]]<br>  [[Change operational regime of weirs and locks]]<br>
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|size=570
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|size_unit=ha
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|costs= 0
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|costs_unit= -1
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|synergy=-
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|status_name= Realised
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|period= 1999
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|evaluation=1
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|organization=
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}}
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==Site description==
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The study was conducted in the free-flowing section of the Danube River about 25 km downstream of
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Vienna (river-km 1895 and 1909). The area designated for restoration is a 570-ha floodplain
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sector on the right orographical bank of the Danube River (‘Regelsbrunner Aue’). At mean water level,
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the channel network is 37 km long, corresponding to a floodplain channel density of 6.5 km km<sup>2</sup> and a total surface area of all floodplain water bodies of 120 ha. The backwater system
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is dominated by a former river channel (total length, ca. 10 km) that was cut off from the main river
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channel at its upstream end more than 100 years ago. This main side channel is subdivided by weirs into
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semi-isolated water bodies (channel segments I–IX in Figure 1). At present, this side channel has surface
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water connections to the river at its downstream end for about 180 days annually. Long stagnant periods
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are interrupted by short-term flood pulses (average duration, B4 days) caused by upstream connections
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at high water levels via former inflow areas in the streamside embankments. However, the floodplain
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system is dynamically connected to the river via its porous aquifer (seepage inflow). Water levels in the
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floodplain system follow the water level fluctuations of the Danube after only a short time lag.</p>
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==Measures selection==
  
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[[Category:Case_studies]]
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==Success criteria==
  
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===Introduction===
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==Ecological response==
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The goal of the ‘Danube Restoration Project’ is to gradually restore hydrological connectivity and
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The biotic ‘functional describers’ include macrophytes, molluscs, odonates, amphibians, fish and benthic invertebrates. In the present analysis, the first four of these groups are focused upon, because sampling strategies for fish and benthic invertebrates are not compatible with the other groups.
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ecological integrity between the river and its floodplain in a segment of the Austrian Danube <ref>Schiemer,
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1995</ref> <ref>Tockner and Schiemer, 1997</ref>. In order to test the effectiveness and success of this large-scale pilot
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project, a long-term evaluation program has been implemented, which includes abiotic, biotic and
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functional components <ref>Hein et al., 1999</ref> <ref>Schiemer et al., in press </ref>. The biotic ‘functional describers’
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(sensu Castella et al., 1984) include macrophytes, molluscs, odonates, amphibians, fish and benthic
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invertebrates. In the present analysis, the first four of these groups are focused upon, because sampling
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strategies for fish and benthic invertebrates are not compatible with the other groups.
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==Hydromorphological response==
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==Monitoring before and after implementation of the project==
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==Socio-economic aspects==
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==Contact person within the organization==
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==Extra background information==
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==References==
 
==References==
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<references />
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<references/>
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[[Category:Case_studies]]
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== Related Measures ==
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<Forecasterlink type="getMeasuresForProject" code="21" />
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== Related Pressures ==
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<Forecasterlink type="getPressuresForProject" code="21" />
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[[Category:Quantity and dynamics of water flow]] [[Category:River continuity]] [[Category:Structure and substrate of the river bed]] [[Category:Macrophytes and phytobenthos]] [[Category:Benthic invertebrates]] [[Category:Fish]]

Latest revision as of 13:13, 8 April 2010

Regelsbrunner Aue


Factsheet: Regelsbrunner Aue

General
Country AT
River Name Danube
Site Name Regelsbrunner Aue
River Characterisation
    River typology
    Location (Lat Lon) 48.1182047605209, 16.6906356811523
    Altitude mid-altitude: 200 - 800 m
    Catchment area very large: > 10000 km2
    Geology Calcareous
    National code/
    River type name     		---
    Hydromorphological quality elements

    Biological quality elements
    Ecosystem Services
    EU Directives
    Pressures
    Measures
    Other
    Project size 570 ha
    Approximate costs
    Synergy ---
    Status Realised
    Period of realization 1999
    Evaluation Hydromorphological changes
    Implemented by ---


    Key features of the case study

    Restore hydrological connectivity and ecological integrity between the river and its floodplains in a segment of the Austrian Danube

    Attention: The information presented below has been taken from Tockner et al.(1999)[1]

    Site description

    The study was conducted in the free-flowing section of the Danube River about 25 km downstream of Vienna (river-km 1895 and 1909). The area designated for restoration is a 570-ha floodplain sector on the right orographical bank of the Danube River (‘Regelsbrunner Aue’). At mean water level, the channel network is 37 km long, corresponding to a floodplain channel density of 6.5 km km2 and a total surface area of all floodplain water bodies of 120 ha. The backwater system is dominated by a former river channel (total length, ca. 10 km) that was cut off from the main river channel at its upstream end more than 100 years ago. This main side channel is subdivided by weirs into semi-isolated water bodies (channel segments I–IX in Figure 1). At present, this side channel has surface water connections to the river at its downstream end for about 180 days annually. Long stagnant periods are interrupted by short-term flood pulses (average duration, B4 days) caused by upstream connections at high water levels via former inflow areas in the streamside embankments. However, the floodplain system is dynamically connected to the river via its porous aquifer (seepage inflow). Water levels in the floodplain system follow the water level fluctuations of the Danube after only a short time lag.</p>

    Measures selection

    Success criteria

    Ecological response

    The biotic ‘functional describers’ include macrophytes, molluscs, odonates, amphibians, fish and benthic invertebrates. In the present analysis, the first four of these groups are focused upon, because sampling strategies for fish and benthic invertebrates are not compatible with the other groups.

    Hydromorphological response

    Monitoring before and after implementation of the project

    Socio-economic aspects

    Contact person within the organization

    Extra background information

    References

    1. ↑ K, TOCKNER,F. SCHIEMER, C. BAUMGARTNER, G. KUM, E. WEIGAND, I. ZWEIMU, LLER AND J.V. WARD (1999). THE DANUBE RESTORATION PROJECT: SPECIES DIVERSITY PATTERNS ACROSS CONNECTIVITY GRADIENTS IN THE FLOODPLAIN SYSTEM. REGULATED RIVERS: RESEARCH & MANAGEMENT 15: 245–258.

    Related Measures

    Related Pressures

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