Case study:The Holbina-Dunavat Restoration Project

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Location: 44° 53' 36.01" N, 29° 7' 21.71" E

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Project overview

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Status	Complete
Project web site
Themes
Country	Romania
Main contact forename	Marian
Main contact surname	Tudor
Main contact user ID
Contact organisation	The Danube Delta Biosphere Reserve Authority
Contact organisation web site	http://www.ddbra.ro
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Holbina area (source: www.info-delta.ro)

Project summary

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Holbina-Dunavat area (S=5630 ha) has been studied from 1994 in order to establish a strategy for ecological restoration by a reintegration of the fish farm basins with the surrounding wetlands by opening the ring dikes around the basins. The positive effects are both ecological (wetland restoration, natural habitat and breeding area for fish and aquatic birds) and socio-economical (development of traditional activities, fishing, livestock and reed harvesting, creation of recreational areas for ecotourism) for the local people.

Works included: Connecting Fishpond Holbina-Dunavat to the Danube regime.

Monitoring surveys and results

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Lessons learnt

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Image gallery

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The entrance in Holbina area (source:www.info-delta.ro)

Dunavat channel (source:www.info-delta.ro)

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 Sf. Gheorghe Branch Area category more than 10000 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 0.5 m5.0e-4 km <br />50 cm <br /> Dominant geology Organic (i.e. Peat) Ecoregion Pontic Province Dominant land cover Wetland Waterbody ID Other case studies in this subcatchment: Ecological reconstruction of islands resulted after Sf. Gheorghe Arm rectification - project 1, Ecological reconstruction of islands resulted after Sf. Gheorghe Arm rectification - project 2, Ecological reconstruction of islands resulted after Sf. Gheorghe Arm rectification - project 3 Site Edit site Name Fishpond Holbina-Dunavat WFD water body codes RORW14.1_B7 WFD (national) typology RO15 WFD water body name Pre-project morphology Sinuous, Fish ponds, Artificial channel Reference morphology Sinuous Desired post project morphology Heavily modified water body No National/international site designation International - RAMSAR site Local/regional site designations Biosphere Reserves Protected species present No Invasive species present No Species of interest Dominant hydrology Artificially regulated, Floodplain area Dominant substrate Peat, Sand River corridor land use Wetland Average bankfull channel width category 10 - 50 m Average bankfull channel width (m) 1212 m <br />0.012 km <br />1,200 cm <br /> Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 150150 m³/s <br />150,000 l/s <br /> Average channel gradient category Average channel gradient 0.015 Average unit stream power (W/m2) 1838.81251,838.813 W/m² <br /> Project background Edit project background Reach length directly affected (m) Project started 1993/01/01 Works started 2003/01/01 Works completed 2004/01/01 Project completed Total cost category more than 10000 k€ Total cost (k€) 2000000 k€2,000,000,000 € <br /> Benefit to cost ratio Funding sources MAPM-ARBDD, National budget, 2000000 Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design more than 10000 k€ 130000 k€130,000,000 € <br /> The Danube Delta National Institute for Research and Development, Tulcea Marian Tudor Stakeholder engagement and communication The Danube Delta Biosphere Reserve Authority, Tulcea Marian Tudor Works and works supervision Post-project management and maintenance The Danube Delta Biosphere reserve Monitoring The Danube Delta National Institute for Research and Development, Tulcea (office@indd.tim.ro) Marian Tudor Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Flood risk management Hydromorphology Quantity & dynamics of flow, Continuity for organisms, Width & depth variation Biology Fish, Macrophytes, Phytoplankton Physico-chemical Nutrient concentrations Other reasons for the project Landscape enhancement, Reintegration of the fish farm basins with the surrounding wetlands, Biofilter for the Danube, Razim and Black Sea Measures Edit Measures Structural measures Bank/bed modifications Create breaches in the bank Floodplain / River corridor Creation of wetland Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other 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 Improvement Continuity of sediment transport Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Fish Improvement Invertebrates Macrophytes Phytoplankton Zooplancton 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 Improvement Salinity pH Oxygen balance Temperature 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 fish resources Improvement Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents The evolution process in Holbina-Dunavat area during restoration works Additional links and references Edit links and references Link Description http://www.ddbra.ro The website of the Danube Delta Biosphere Reserve Authority Supplementary Information Edit Supplementary Information