Case study:The Cernovca Restoration Project

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Location: 45° 24' 9.60" N, 29° 29' 42.07" 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
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encompassing the following
projects
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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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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 Babina Restoration Project


Site

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Name Agricultural polder Cernovca
WFD water body codes RORW14.1_B6
WFD (national) typology RO15
WFD water body name
Pre-project morphology Embanked
Reference morphology Sinuous
Desired post project morphology
Heavily modified water body
National/international site designation
Local/regional site designations RAMSAR site
Protected species present
Invasive species present
Species of interest
Dominant hydrology Artificially regulated
Dominant substrate Sand
River corridor land use Grassland
Average bankfull channel width category more than 50 m
Average bankfull channel width (m) 350350 m <br />0.35 km <br />35,000 cm <br />
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient 0.015
Average unit stream power (W/m2)


Project background

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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 50 - 100 k€
Total cost (k€)
Benefit to cost ratio
Funding sources

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



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
Floodplain / River corridor Creation of wetlands
Planform / Channel pattern Reconnecting Cernovca polder to

the 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 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 Improvement

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
Nutrient concentrations 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
Important

biogeochemical role for nutrient retention and cycling.

Improvement


Monitoring documents

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Development of zoobenthos in the restored polder Cernovca



Image gallery


Satellite image of Cernovca area (1993)
Satellite image of Cernovca area (1996)


Additional documents and videos

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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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