Case study:The Cernovca Restoration Project

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Location: 45° 24' 10", 29° 29' 42"
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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
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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 Cernovca polder (1.580ha) was reconnected to the Danube in 1996, and recovery has been monitored by the Danube Delta National Institute for Research and Development Tulcea. 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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Image gallery


Satellite image of Cernovca area (1993)
Satellite image of Cernovca area (1996)
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Catchment and subcatchment

Catchment

River basin district Danube
River basin Danube Delta

Subcatchment

River name Chilia Branch
Area category Less than 10 km²
Area (km2) 2.10
2.1 km²
210 ha
Maximum altitude category Less than 100 m
Maximum altitude (m) 2.4
2.4 m
0.0024 km
240 cm
Dominant geology Organic (i.e. Peat)
Ecoregion Pontic Province
Dominant land cover Grassland, Reed
Waterbody ID



Other case studies in this subcatchment: The Babina Restoration Project


Site

Name Agricultural polder Cernovca
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, Wetland
Dominant substrate Sand, Clay
River corridor land use Grassland, Wetland
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category 0.5 - 2 m
Average bankfull channel depth (m) 1.50
1.5 m
0.0015 km
150 cm
Mean discharge category more than 1000 m³/s
Mean annual discharge (m3/s) 3606
3,606 m³/s
3,606,000 l/s
Average channel gradient category
Average channel gradient 0.015
Average unit stream power (W/m2)


Project background

Reach length directly affected (m)
Project started 1991/01/01
Works started 1996/01/01
Works completed 1996/01/01
Project completed
Total cost category 1 - 10 k€
Total cost (k€) 5654
5,654 k€
5,654,000 €
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
Stakeholder engagement and communication The Danube Delta Biosphere Reserve Authority, Tulcea
Works and works supervision
Post-project management and maintenance The Danube Delta National Institute for Research and Development, Tulcea (office@indd.tim.ro) Marian Tudor
Monitoring The Danube Delta National Institute for Research and Development, Tulcea (office@indd.tim.ro) Marian Tudor

Supplementary funding information

Funding sources for post-project management and maintenance came from national budget.



Reasons for river restoration

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

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


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Quantity & dynamics of flow Improvement

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Fish: Species composition No Yes No No No Improvement
Invertebrates No No Yes No No
Macrophytes No No No Yes No
Phytoplankton No No No No No

Physico-chemical quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Nutrient concentrations Yes No No No No Improvement
Salinity No Yes No No No
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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative
Important biogeochemical role for nutrient retention andcycling. Yes No No No No Improvement
Fish No Yes No No No
Pastures No No No No No
Reed No No No No No
Medicinal plants No No No No No


Monitoring documents




Additional documents and videos


Additional links and references

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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