Case study:Conservation of alluvial

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Location: 46° 1' 23.16" N, 18° 41' 22.16" E

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Project overview

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Status	Complete
Project web site	http://szabadsagsziget.hu/index.php?l=_en
Themes	Habitat and biodiversity
Country	Hungary
Main contact forename	Viktoria
Main contact surname	Siposs
Main contact user ID
Contact organisation	WWF Hungary, Danube Drava National Park Directorate
Contact organisation web site	http://www.ddnp.hu/index.php?lang=en
Partner organisations	Municipality of Mohacs Town, Transdanubian Regional Waterworks Corporation, Lower-Danube-valley Water Directorate, Coca-Cola HBC Hungary, Cargill
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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30 years ago the side channel was divided by a rock embankment dam resulting in sediment build up and stopping the flow of water. As a result the unique habitats of the side channel and the island were being lost and the river was losing its healthy ecosystem. The project aimed to restore the island’s natural floodplain forest and protect drinking water supplies by dredging the side channel, removing the dam to allow the free flow of water and relocating a major water pipe from the dam under the riverbed. Other restoration works included clearing invasive plant species such as box elder and replanting native trees such as silver poplar. Once the restoration works are completed it is hoped that native fish and bird species will return. It is also hoped that the restoration of Liberty Island, a Natura 2000 site, will encourage other similar projects along the Danube. In order to promote the benefits of restoration a nature trail was created, and field trips and scientific demonstrations have been given about Liberty Island. The project has been carried out in collaboration with WWF Hungary, Municipality of Mohacs Town, Transdanubian Regional Waterworks Corporation, Lower-Danube-valley Water Directorate, Danube Drava National Park Directorate, Coca-Cola HBC Hungary and Cargill. Supported by Life+ the project is the first step in protecting numerous islands and side-channels on the Danube and restoring original water habitats.

Works involved: Removal of alien and invasive tree species.

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Image gallery

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The Danube River

Szabadság-sziget (Liberty Island)

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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 Sava River Area category more than 10000 km² Area (km2) Maximum altitude category 500 - 1000 m Maximum altitude (m) 833833 m <br />0.833 km <br />83,300 cm <br /> Dominant geology Calcareous Ecoregion Dinaric Western Balkan, Alps Dominant land cover Waterbody ID Other case studies in this subcatchment: Hainburg River Restoration, INTERREG MED WETNET - Memoradum on Participation in Wetland Conservation in Ljubljansko Barje Nature Park, Marsh protection in Egyek–Pusztakócs, National Park Danube-Auen, Regelsbrunner Aue, Renaturation of Stržen's riverbed on intermittent Cerknica Lake, The Bulgarian Wetlands Restoration and Pollution Reduction Project, Witzelsdorf Pilot Project Site Edit site Name Szabadság-sziget (Liberty Island) WFD water body codes AEP445 WFD (national) typology WFD water body name Pre-project morphology Artifical oxbow completely cut-off from the main river; Silted up significantly Reference morphology Sidearm Desired post project morphology Heavily modified water body No National/international site designation EU - Special Protected Area Local/regional site designations Natura 2000; National Park Protected species present No Invasive species present No Species of interest Dominant hydrology Permanent lentic Dominant substrate Sand, Gravel River corridor land use Intensive agriculture, Woodland, Urban Average bankfull channel width category Average bankfull channel width (m) Average bankfull channel depth category 5 - 10 m Average bankfull channel depth (m) Mean discharge category more than 1000 m³/s Mean annual discharge (m3/s) 28232,823 m³/s <br />2,823,000 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) 30003,000 m <br />3 km <br />300,000 cm <br /> Project started Works started Works completed Project completed Total cost category 1000 - 5000 k€ Total cost (k€) 17951,795 k€ <br />1,795,000 € <br /> Benefit to cost ratio Funding sources LIFE+ (LIFE07 NAT/H/000320) (http://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.createPage&s_ref=LIFE07%20NAT/H/000320) Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design WWF Hungary, Danube-Drava National Park Directorate, Municipality of Mohács town Viktoria Siposs Stakeholder engagement and communication Lower-Danube-Valley Water Management Directorate, WWF Hungary Works and works supervision 1000 - 5000 k€ 10751,075 k€ <br />1,075,000 € <br /> WWF Hungary, Cargill Hungary, Transdanubian Regional Waterworks Public Company (DRV Zrt.) Post-project management and maintenance Danube Drava National Park Directorate Sandor Kövesi Monitoring Danube Drava National Park Directorate Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Quantity & dynamics of flow, Substrate conditions Biology Fish: Species composition Physico-chemical Nutrient concentrations Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Dredging, Removal of rock-fill weir, Relocation of the drinking water pipes Floodplain / River corridor Control of invasive species Planform / Channel pattern Other Non-structural measures Management interventions Protection of the island, Ensuring biodiversity Social measures (incl. engagement) Recreation, Improvement of drinking water quality, Land purchase Other Information provision, Consultation, Participation in works 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 No Yes No Awaiting results 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 No No Yes No No Awaiting results Invertebrates: Taxonomic composition No No Yes No No Awaiting results 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 No No No Yes No Awaiting results 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