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
Partner organisations
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.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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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

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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

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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

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Mitigation of a pressure
Hydromorphology	Substrate conditions
Biology
Physico-chemical	Specific non-synthetic pollutants
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Construction of gravel banks, Removal of sludge, Planting, Creation of fish spawn nursing places
Floodplain / River corridor
Planform / Channel pattern	introducing sinuosity
Other
Non-structural measures
Management interventions	Reduced pollution
Social measures (incl. engagement)
Other	Information provision, Consultation

Monitoring

Hydromorphological quality elements

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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

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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

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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

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

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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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

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