Case study:Vén-Duna (Old-Danube) sidearm’s revitalization

0.00

(0 votes)

To discuss or comment on this case study, please use the discussion page.

Location: 46° 12' 44.92" N, 18° 54' 0.63" E

Edit location

Loading map...

{"format":"googlemaps3","type":"HYBRID","minzoom":false,"maxzoom":false,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":50,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"... further results","default":"","import-annotation":false,"width":"auto","height":"400px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"visitedicon":"","wmsoverlay":false,"zoom":14,"layers":[],"controls":["pan","zoom","type","scale","streetview","rotate"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"cluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[""],"searchmarkers":"","fullscreen":false,"scrollwheelzoom":false,"showtitle":false,"hidenamespace":true,"template":"Location map popup","userparam":"","activeicon":"","pagelabel":false,"ajaxcoordproperty":"","ajaxquery":"","locations":[{"text":"\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Title:\u003C/b\u003E V\u00e9n-Duna (Old-Danube) sidearm\u2019s revitalization\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003ECountry:\u003C/b\u003E \u003Ca href=\"/wiki/index.php?title=Hungary\" title=\"Hungary\"\u003EHungary\u003C/a\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Status:\u003C/b\u003E Complete\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EThemes:\u003C/b\u003E Water quality\n\u003C/p\u003E\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E","title":"V\u00e9n-Duna (Old-Danube) sidearm\u2019s revitalization","link":"","lat":46.212476907,"lon":18.900175095,"icon":"/wiki/images/a/af/Red_marker.png"}]}

Left click to look around in the map, and use the wheel of your mouse to zoom in and out.

Project overview

Edit project overview

Status	Complete
Project web site
Themes	Habitat and biodiversity, Monitoring, Water quality
Country	Hungary
Main contact forename	Bela
Main contact surname	Csanyi
Main contact user ID
Contact organisation	„VITUKI” Environmental and Water Management Research. Institute Non-Profit Public LLC
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

This case study hasn’t got a picture, you can add one by editing the project overview.

Project summary

Edit project overview to modify the project summary.

The aim of the project was to obtain knowledge and experience on possibilities how to restore natural hydro-morphologic conditions and the connectivity between the river and floodplain zone. The main objective of the implementations was to provide a direct water flow connection between the Danube main stream and the side arm in order to restore the natural biodiversity and rheophilic communities typical for aquatic floodplain landscapes. The re-opening was accompanied by an extensive scientific research and monitoring program, which showed changes in riverbed morphology upstream and downstream of the rock dam. Restored high floods increased sediment transport, erosion and deposition. Suitable habitats for rheophilous invertebrate and fish species as well as species diversity and population numbers typical for dynamic water bodies increased.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.

Image gallery

Edit Image gallery

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 Danube Subcatchment River name Old-Danube side arm Area category more than 10000 km² Area (km2) 181000 km²18,100,000 ha <br /> Maximum altitude category 100 - 200 m Maximum altitude (m) Dominant geology Calcareous Ecoregion Hungarian Lowlands Dominant land cover Woodland, Wetland Waterbody ID Site Edit site Name Vén-Duna (Old-Danube) sidearm WFD water body codes AEP444 WFD (national) typology Danube between Szob and Baja WFD water body name Pre-project morphology Artifical oxbow cut-off from the main river Reference morphology Sidearm Desired post project morphology Heavily modified water body National/international site designation EU - Special Area of Conservation Local/regional site designations National Park, Natura 2000, Ramsar Protected species present Invasive species present Species of interest Dominant hydrology Lentic Dominant substrate Sand, Silt River corridor land use Intensive agriculture (arable), Urban, Plantation forestry Average bankfull channel width category more than 50 m Average bankfull channel width (m) Average bankfull channel depth category 5 - 10 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 24002,400 m³/s <br />2,400,000 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) 4500 m4.5 km <br />450,000 cm <br /> Project started 1992/04/01 Works started 1998/08/01 Works completed 2004/09/01 Project completed Total cost category 50 - 100 k€ Total cost (k€) 66 k€66,000 € <br /> Benefit to cost ratio Funding sources RIZA (Institute for Inland Water Management and Waste Water Treatment of the Netherlands) Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design RIZA (Institute for Inland Water Management and Waste Water Treatment of the Netherlands) Stakeholder engagement and communication „VITUKI” Environmental and Water Management Research. Institute Non-Profit Public LLC Works and works supervision „VITUKI” Environmental and Water Management Research. Institute Non-Profit Public LLC Post-project management and maintenance „VITUKI” Environmental and Water Management Research. Institute Non-Profit Public LLC Monitoring „VITUKI” Environmental and Water Management Research. Institute Non-Profit Public LLC Bela Csanyi Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Substrate conditions, Quantity & dynamics of flow, Continuity for organisms Biology Fish: Abundance, Fish: Species composition, Phytoplankton: Blooms Physico-chemical Nutrient concentrations, Oxygen balance, Temperature Other reasons for the project Recreation, Landscape enhancement, Community demand Measures Edit Measures Structural measures Bank/bed modifications Weir removal, Dredging Floodplain / River corridor Construction of new sluices Planform / Channel pattern Other Non-structural measures Management interventions Ensuring biodiversity Social measures (incl. engagement) Recreation Other Information provision, Consultation Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Quantity & dynamics of flow Yes Yes Yes Improvement Substrate conditions Yes Yes Improvement Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Fish: Species composition Yes Yes Yes Improvement Invertebrates Yes Yes Improvement 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 Nutrient concentrations Yes Yes Yes Improvement Oxygen balance Yes Yes Yes Improvement Temperature Yes Improvement 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://okologia.mta.hu/en Centre for Ecological Research HAS - The institute network of the Hungarian Academy of Sciences is set to produce values for both national and international success in Hungarian and universal science. The Centre's primary aim is to play a fundamental role in promoting the common weal and in building the foundation for the future through valuable scientific achievements based on highly promising discovery research. The Centre consists of three institutes, the Balaton Limnological Institute, the Danube Research Institute and the Institute of Ecology and Botany. http://www.ovf.hu/ General Driectorate of Water Management - General Directorate of Water Management (OVF) is a background institution of the Ministry of Interior. It supports the work of the Minister regarding the flood management. Its main task is the coordination of flood hazard prevention, river control and flood protection activities, and the management of development projects concerning water bodies. OVF has 12 regional directorates which are coordinating the catchment management planning according to the requirements of the EU WFD. They take preventive and protective measures against floods, carry out status assessments and are the leading organizations in the management and implementation of river restoration projects. http://neki.gov.hu/ National Institute for Environment - The National Institute for Environment (NeKI) is a background institution of the Ministry of Rural Development, and assists the Minister in the various duties of water management, environmental protection and nature conservation. NeKI has 12 regional branch offices, and is in charge of the strategies, policies and regulations regarding the management and exploitation of water resources. It performs environmental monitoring, status and impact assessments, administrates the national network for hydrological, hydrographical, hydrogeological and quality measurements of public waters. NeKI also coordinates the planning and the implementation of national and EU projects. http://www.orszagoszoldhatosag.gov.hu/index en.php National Inspectorate for Environment, Nature and Water - The Inspectorate attends to administrational and water management matters, to analyses and consideration of law proposals in its field, and it supervises its 10 regional inspectorates as well. It coordinates international co-operations and takes part in the tasks connected to the EU integration. The regional inspectorates and two sub-offices are the 'green authorities' at first instance. The regional inspectorates are responsible for registration, monitoring, protection, conservation, reconstruction, rehabilitation, authorization and penalty processes regarding environment, nature and water in their assigned territory. http://wwf.hu/en WWF Hungary - WWF Hungary is the Hungarian arm of the WWF Network and was founded in 1991. It's main aims are protecting the biodiversity of Hungary by focusing on freshwaters, forests and priority species. They are also fighting against climate change and they support WWF's conservation work as well. They participated in the development of the Danube Strategy, as well as organized conservation projects on Hungary's two largest rivers, the Tisza and the Danube. http://www.icpdr.org/main/ International Commission for the Protection of the Danube River (ICPDR) - The ICPDR is an International Organisation consisting of 14 cooperating states and the European Union. Since its establishment in 1998, the ICPDR has grown into one of the largest and most active international bodies of river basin management expertise in Europe. The ICPDR deals not only with the Danube itself, but also with the whole Danube River Basin, which includes its tributaries and the ground water resources. Supplementary Information Edit Supplementary Information