Case study:The Babina Restoration Project

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Location: 45° 25' 29.15" N, 29° 24' 42.35" E
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Project overview

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Status Complete
Project web site
Themes Habitat and biodiversity
Country Romania
Main contact forename Marian
Main contact surname Tudor
Main contact user ID
Contact organisation The Danube Delta National Institute for Research and Development, Tulcea
Contact organisation web site http://www.ddni.ro
Partner organisations The Danube Delta Biosphere Reserve Authority
Parent multi-site project
This is a parent project
encompassing the following
projects
No
The Babina - present situation

Project summary

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Until the 20th century vast areas of the Danube Delta faced only minimal human impacts through extensive fishery and reed harvesting. Since then the Danube Delta has undergone multiple human impacts like embankment, channelization and drainage. Moreover, large areas were diked and the polders used for agriculture. The Babina polder (2.100 ha) was reconnected to the Danube in 1994 and recovery has been monitored by the Danube Delta National Institute for Research and Development. Within a few years a redevelopment of the site-specific biodiversity occurred and ecosystem services like nutrient retention and fish recruitment became obvious. Additionally, the reconnected polder enable reed harvesting, grazing, fishing and ecotourism.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this subcatchment)

Catchment

River basin district Danube
River basin Danube Delta

Subcatchment

River name Chilia Branch
Area category Less than 10 km²
Area (km2) 2.102.1 km² <br />210 ha <br />
Maximum altitude category Less than 100 m
Maximum altitude (m) 2.42.4 m <br />0.0024 km <br />240 cm <br />
Dominant geology Organic (i.e. Peat)
Ecoregion Pontic Province
Dominant land cover Grassland, Reed
Waterbody ID



Other case studies in this subcatchment: The Cernovca Restoration Project


Site

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Name Agricultural polder Babina
WFD water body codes RORW14.1_B6
WFD (national) typology RO15
WFD water body name
Pre-project morphology Embanked, Agricultural land
Reference morphology Sinuous, Artificial channel
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 Sand, Clay
River corridor land use Grassland, Wetland
Average bankfull channel width category more than 50 m
Average bankfull channel width (m) 340340 m <br />0.34 km <br />34,000 cm <br />
Average bankfull channel depth category 0.5 - 2 m
Average bankfull channel depth (m) 1.951.95 m <br />0.00195 km <br />195 cm <br />
Mean discharge category more than 1000 m³/s
Mean annual discharge (m3/s) 36063,606 m³/s <br />3,606,000 l/s <br />
Average channel gradient category 0.01 - 0.1
Average channel gradient 0.015
Average unit stream power (W/m2) 1560.17832352941,560.178 W/m² <br />


Project background

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Reach length directly affected (m)
Project started 1991/01/01
Works started 1994/04/01
Works completed 1994/05/01
Project completed
Total cost category 10 - 50 k€
Total cost (k€) 24072,407 k€ <br />2,407,000 € <br />
Benefit to cost ratio
Funding sources GEF biodiversity preservation project in the Danube Delta

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design The Danube Delta Biosphere Reserve Authority, Tulcea Marian Tudor
Stakeholder engagement and communication The Danube Delta Biosphere Reserve Authority, Tulcea Marian Tudor
Works and works supervision The Danube Delta Biosphere Reserve Authority, Tulcea
Post-project management and maintenance The Danube Delta Biosphere Reserve Authority, Tulcea
Monitoring The Danube Delta National Institute for Research and Development, Tulcea (office@indd.tim.ro) Marian Tudor



Reasons for river restoration

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Mitigation of a pressure Flood risk management
Hydromorphology Continuity for organisms
Biology Fish: Species composition
Physico-chemical Nutrient concentrations
Other reasons for the project Landscape enhancement, Recreation


Measures

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Structural measures
Bank/bed modifications Create breaches in the bank
Floodplain / River corridor Creation of wetlands
Planform / Channel pattern Reconnecting Babina polder tothe Danube flooded regime
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


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
Quantity & dynamics of flow No Yes No No No Improvement
Continuity of sediment transport No No No No No 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 No No No No Improvement
Phytoplankton: Taxonomic composition No No No No No Improvement
Invertebrates No Yes No No No
Macrophytes No No No No No

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
Salinity No Yes No No No Improvement
PH No No No No No
Oxygen balance No No No No No
Temperature No No No No No

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
Ecological tourism development No No No No No Improvement
Fish No Yes No No No
Reed No Yes No No No
Pasture No Yes No No No
Medicinal plants No Yes No No No


Monitoring documents

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Development of zoobenthos in the restored polder Babina


The evolution of Babina polder after restoration work



Image gallery


The Babina polder before restoration
The Babina polder after restoration
Restored lake and Babina Island
European mink (Mustela lutreola) in the restored area
European otter (Lutra lutra) in the restored area
Little egret (Egretta garzetta) in the restored area
Satellite image of Babina area (1993)
Satellite image of Babina area (1996)


Additional documents and videos

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Babina and Cernovca Islands


Additional links and references

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Link Description
http://www.ddni.ro The website of The Danube Delta National Institute for Research and Development, Tulcea, Romania

Supplementary Information

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