Case study:Remediation and revitalization of Séd-Nádor stream

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Location: 47° 6' 27.73" N, 18° 3' 28.29" E

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Project overview

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Status	Complete
Project web site	http://www.sednador-karmentesites.hu/
Themes	Habitat and biodiversity, Water quality
Country	Hungary
Main contact forename	László
Main contact surname	Mag
Main contact user ID
Contact organisation	Séd-Nádor 2009 Consortium
Contact organisation web site
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Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The activity of the Nitrokémia chemical industry was recently terminated, but it's sewage waters left the Séd-Nádor stream along a 125 km long section polluted by toxic metals, which pose a significant environmental risk caused mainly by mercury, cadmium and lead. The aim of the project is to restore and rehabilitate the Séd-Nádor stream by removing the polluted sludge, creating structures in the streambed and by the recultivation of the banks and surrounding area. All interventions are based on an ecological and human health risk assessment.

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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 Danube Subcatchment River name Séd-Nádor stream (Sárvíz) Area category 100 - 1000 km² Area (km2) 733 km²73,300 ha <br /> Maximum altitude category 100 - 200 m Maximum altitude (m) Dominant geology Calcareous Ecoregion Hungarian Lowlands Dominant land cover Intensive agriculture (arable), Plantation forestry, Woodland, Grassland, Wetland Waterbody ID Site Edit site Name WFD water body codes HU RW AAA102 WFD (national) typology AEP819 WFD water body name Pre-project morphology Single channel, Straightened Reference morphology Sinuous, Step-pool Desired post project morphology Heavily modified water body true National/international site designation EU - Special Area of Conservation Local/regional site designations Protected species present Invasive species present Species of interest Dominant hydrology Dominant substrate Sand, Silt, Gravel River corridor land use Intensive agriculture (arable), Plantation forestry, Grassland, Wetland Average bankfull channel width category 10 - 50 m Average bankfull channel width (m) 1616 m <br />0.016 km <br />1,600 cm <br /> Average bankfull channel depth category 2 - 5 m 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 2009/03/01 Works started 2011/07/01 Works completed Project completed Total cost category 5000 - 10000 k€ Total cost (k€) 5200 k€5,200,000 € <br /> Benefit to cost ratio Funding sources National Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 1000 - 5000 k€ 1470 k€1,470,000 € <br /> Séd-Nádor 2009 Consortium László Mag Stakeholder engagement and communication 100 - 500 k€ 203 k€203,000 € <br /> Séd-Nádor 2009 Consortium László Mag Works and works supervision 1000 - 5000 k€ 3400 k€3,400,000 € <br /> Séd-Nádor 2009 Consortium László Mag Post-project management and maintenance Séd-Nádor 2009 Consortium László Mag Monitoring 100 - 500 k€ 109 k€109,000 € <br /> Séd-Nádor 2009 Consortium László Mag Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Substrate conditions Biology Physico-chemical Specific non-synthetic pollutants Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Construction of gravel banks, Removal of sediment, Planting, Creation of fish spawn nursing places Floodplain / River corridor Planform / Channel pattern Adding sinuosity Other Non-structural measures Management interventions Reduced pollution Social measures (incl. engagement) 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 Substrate conditions 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 Awaiting results Invertebrates 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 Specific non-synthetic pollutants 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