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
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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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, 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)	1.501.5 m <br />0.0015 km <br />150 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
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	1 - 10 k€
Total cost (k€)	56545,654 k€ <br />5,654,000 € <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
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

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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 Cernovca 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						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	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

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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

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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 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

Monitoring documents

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Development of zoobenthos in the restored polder Cernovca

Image gallery

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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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