Last update
2025
Summary
The project, part of a wider pollution-reduction programme, restored key habitats for bird conservation by improving lagoon water circulation, removing ~185 000 m³ of polluted sediments, creating a new freshwater marsh at Bertoška bonifika, flooding former farmland, and installing sluices to regulate marine and freshwater inflows. About 40 000 m³ of clean material was reused to form mudflats and nesting islets, enhancing habitats for species such as little bittern, great reed warbler, and little grebe. The restoration also included construction of visitor facilities and observation points (2009–2015), and establishment of a circular educational trail. Management is ongoing under DOPPS – BirdLife Slovenia, with adaptive measures such as late mowing and grazing by Istrian cattle and Camargue horses to maintain wet meadows. The reserve is involved in recent cross-border projects (e.g. POSEIDONE 2023–2025) promoting green and blue infrastructure, and continues active monitoring of birds, water quality, and hydrology.
Position
Latitude
45.55
Longitude
13.73
Project
NWRM
National Id
Slovenia_04
Installation date
2007-06
Implementation Status
Contact
REC
RBD code
SI_RBD_2
Transboundary
0
Photo gallery
Location of the project
The Škocjanski Zatok Nature Reserve is located on the outskirts of Koper, Slovenia, on the north-eastern shore of the Bay of Koper in the northern Adriatic. It lies between the urban area of Koper, the port facilities (Luka Koper), and the main road H5 expressway connecting Koper to the Slovenian motorway network and to Šmarje/Dragonja. The site is adjacent to the railway line and close to the main road link toward the Škocjan settlement.
NUTS Code
SI02 - Zahodna Slovenija
Project's objectives
Approximately 225,000 cubic meters of mud were dredged from the lagoon: 185.000 cubic meters of organically polluted mud was removed to the disposal site, which resulted in reducing the eutrophication and organic pollution, enable water circulation inside the lagoon and increase of bioproduction, which all contributed towards improved ecological conditions in the lagoon and substantially reduced risk of botulism.
The remaining 40.000 cubic meters of non-polluted mud was used to create 20 ha of mudflats and nesting islets in order to create conditions for the habitat types, listed on Annex I of the EU Habitat Directive as well as provide breeding and feeding grounds for endangered breeding birds.
Water inflow improved upon several activities, including two most important ones: cleaning of the Rižana river left discharging channel Ara outlet and riverbed (Ara is the only freshwater source for the reserve) and mounting of the sluice system at the sea channel, which will enable full water level control in the future.
The remaining 40.000 cubic meters of non-polluted mud was used to create 20 ha of mudflats and nesting islets in order to create conditions for the habitat types, listed on Annex I of the EU Habitat Directive as well as provide breeding and feeding grounds for endangered breeding birds.
Water inflow improved upon several activities, including two most important ones: cleaning of the Rižana river left discharging channel Ara outlet and riverbed (Ara is the only freshwater source for the reserve) and mounting of the sluice system at the sea channel, which will enable full water level control in the future.
Involved Partners
| Authority type | Authority name | Role | Comments |
|---|---|---|---|
Climate zone
warm temperate moist
Temperature
13,5
Precipitation
950
Elevation range
8
Slope range
0-1%
Vegetation class
It is one of the sites in the network of coastal Mediterranean wetlands in N Adriatic, important for migratory birds and one of only two such sites located on the Slovenian coastline. Due to the obvious rarity of such habitats at the country level it was important to re-establish its favourable conservation status in order to support the favourable conservation status of other site as well.
Water bodies: Ecological Status
Good
Water bodies: Chemical Status
Failing to achieve good
Water quality status
Before restoration, the lagoon was silted and polluted with organic matter and nutrients from urban, port, and farm runoff; 185 000 m³ of contaminated sediments were removed.
Project scale
Micro
Project scale specification
This is a micro-scale project, as it concerns a single protected wetland site – the Škocjanski Zatok Nature Reserve (122 ha) – with localised hydromorphological works, habitat restoration, and site-specific management measures.
Performance timescale
1 - 4 years
Project area
26,5
Area subject to Land use change or Management/Practice change (ha)
23
Size
71
Size unit
ha
Design capacity description
The brackish lagoon of over 71 ha has been restored into a diverse mixture of already existing or developing 5 Natura 2000 habitat types.
Total cost
€ 4,269,252
Costs total information
LIFE restoration project (2001–2007): €899,252.
Visitor infrastructure programme (2009–2015) : €3.37 million
Visitor infrastructure programme (2009–2015) : €3.37 million
Financing authorities
Type of funding
EU-funds: LIFE+
Comments
€669,439
Type of funding
National funds
Comments
€30,000
Type of funding
Local funds
Comments
€199,813
Type of funding
EU-funds: Rural development funds
Comments
€2.35 million
Type of funding
National funds
Comments
€1.02 million.
Policy context
Drastic loss of habitat and species due to Industrial development.
Land ownership
The Škocjanski Zatok Nature Reserve is state-owned land under the Republic of Slovenia, designated as a protected area and managed under national conservation law.
Community involvment
Yes
Design consultation activity
| Activity stage | Name | Key issues | Comments |
|---|---|---|---|
|
Design phase
|
Awareness-raising and educational activities
|
Because of the exceptional importance of the project for the nature conservation in Slovenia as such, great emphasis was placed on the project activities aiming to increase the conservation awareness. Among those were very important regular contacts and presentations to the local people at lectures and guided tours, to the school children on the field classes, and also preparing and updating of the web site and publication of bulletins. All stages of the largest restoration of a protected area in Slovenia have been filmed and at the project end, an educational documentary film was prepared and a publication released.
|
Policy target
| Target purpose |
|---|
|
Pollutants Removal
|
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Improved Biodiversity
|
|
Runoff control
|
Policy pressure
| Pressure directive | Relevant pressure |
|---|
Policy impact
| Impact directive | Relevant impact |
|---|
Requirement directive
| Requirement directive | Specification |
|---|
Contractual arrangements
1
| Arrangement type | Responsibility | Role | Name | Comments |
|---|---|---|---|---|
|
Other
|
Partnership
|
Firm and successful partnership between DOPPS †“ BirdLife Slovenia and the Ministry of the Environment and Spatial Planning, which is quite unique in the field of co-operation between governmental and non-governmental sectors in Slovenia, was one of the basis of the project success. That†™s how we managed to implement a pilot project, which doubtlessly ranks among top ten restoration projects of degraded natural areas in the Mediterranean part of Europe. On the other hand, existing BirdLife partnership and newly established Adriawet network, where the beneficiary actively participated brought additional value-added to the project through knowledge and expertise gained.
|
Part of wider plan
0
Wider plan type
| Wider plan type | Wider plan focus | Name | Comments |
|---|---|---|---|
|
National
|
Environment & Biodiversity
|
Decree on Program of conservation and development of Å kocjanski zatok Nature Reserve for the period 2007-11
|
Reserve Management Plan for the period 2007-11 was the most crucial document for the future of the reserve, as it guarantees sustainability and continuation of this project. On 30.8.2007, it was adopted by the Government of the Republic of Slovenia in a form of a legal act: Decree on Program of conservation and development of Skocjanski Zatok Nature Reserve for the period 2007-11
|
DOPPS monitors birds, water quality, hydrology, and habitats with national partners.
Monitoring covers avian populations (species presence, breeding success, abundance), water quality (nutrient concentrations, pollutants), hydrological variables (water levels in lagoon and freshwater marsh, sluice operations), and habitat status (extent and condition of reed beds, mudflats, and wet meadows). These data are used to adapt management practices, ensuring that target habitats and species maintain favourable conservation status.
Maintenance
DOPPS maintains habitats via mowing, grazing, and water level regulation.
40,000 m³ of clean sediment reused to create habitats.
Creation of a 2 km circular educational trail, observation towers, and visitor centre (2009–2015) improved public access and environmental education.
Increased attractiveness for eco-tourism and birdwatching, integrating the site into local and regional tourist offerings.
Regular guided tours, school programmes, and exhibitions run by DOPPS, raising awareness of wetland conservation and Natura 2000 values.
Involvement of local stakeholders, including the Port of Koper (Luka Koper d.d.) as co-financier, linking industrial actors with conservation goals.
Public perception of the site improved due to its transformation from a polluted, degraded wetland to a valued recreational and natural area.
Creation of a 2 km circular educational trail, observation towers, and visitor centre (2009–2015) improved public access and environmental education.
Increased attractiveness for eco-tourism and birdwatching, integrating the site into local and regional tourist offerings.
Regular guided tours, school programmes, and exhibitions run by DOPPS, raising awareness of wetland conservation and Natura 2000 values.
Involvement of local stakeholders, including the Port of Koper (Luka Koper d.d.) as co-financier, linking industrial actors with conservation goals.
Public perception of the site improved due to its transformation from a polluted, degraded wetland to a valued recreational and natural area.
Information on retained water
Improved water circulation between the lagoon, sea, and freshwater inflows (Rižana/Ara channel) through sluice installation and channel cleaning.
Hydraulic control allows seasonal water level management in lagoon and freshwater marsh, supporting habitat needs.
Creation of new hydraulic annexes: ~20 ha of mudflats/islets and freshwater marsh (13 ha wet meadows, 10 ha open water/reedbeds, 3.5 ha outside project).
Hydraulic control allows seasonal water level management in lagoon and freshwater marsh, supporting habitat needs.
Creation of new hydraulic annexes: ~20 ha of mudflats/islets and freshwater marsh (13 ha wet meadows, 10 ha open water/reedbeds, 3.5 ha outside project).
Water quality overall improvements
Positive impact-WQ improvement
Information on Water quality overall improvements
Removal of ~185,000 m³ of contaminated sediment (polluted with nutrients and organic matter) reduced eutrophication risk and improved lagoon water quality.
1
Improving the habitats along the lagoon borders, mainly mudflats and nesting islets, important for enhancing the halophyte habitats and as nesting sites for endangered birds using another 40,000 cubic meters of dredged sediment;
Increase of bird populations during the project period and increase of the number of species and populations of the breeding birds in the first breeding season after the restoration.
Increase of bird populations during the project period and increase of the number of species and populations of the breeding birds in the first breeding season after the restoration.
Ecosystem impact climate regulation
No information available
Key lessons
A key lesson from Škocjanski Zatok is that large-scale ecological restoration in highly degraded urban–industrial settings is possible when ecological, engineering, and stakeholder interests are integrated. The site was heavily polluted and hydrologically altered, yet targeted dredging, reconnection of water flows, and habitat creation reversed decades of degradation.
Strong, long-term institutional commitment proved essential. DOPPS – BirdLife Slovenia’s continuous involvement, from planning to current management, ensured that restoration gains were maintained. Coupling restoration with a clear management plan and regular monitoring allowed adaptive responses to ecological changes.
Securing diverse funding sources was another success factor. Combining EU programmes (LIFE, ERDF), national funds, and private contributions (Port of Koper) made it possible to cover both the capital-intensive restoration phase and subsequent infrastructure for education and tourism.
Integrating public access and education early in the project built local support and helped shift public perception of the site. Facilities such as screened trails and observation towers balanced human use with wildlife needs, increasing the reserve’s socio-economic value without undermining conservation goals.
Finally, the project highlighted the importance of multifunctionality in wetland restoration. By improving biodiversity, water quality, and recreational opportunities, Škocjanski Zatok became a model for linking habitat restoration with broader community and regional benefits.
It's the first example in Slovenia of an NGO managing a protected area.
Strong, long-term institutional commitment proved essential. DOPPS – BirdLife Slovenia’s continuous involvement, from planning to current management, ensured that restoration gains were maintained. Coupling restoration with a clear management plan and regular monitoring allowed adaptive responses to ecological changes.
Securing diverse funding sources was another success factor. Combining EU programmes (LIFE, ERDF), national funds, and private contributions (Port of Koper) made it possible to cover both the capital-intensive restoration phase and subsequent infrastructure for education and tourism.
Integrating public access and education early in the project built local support and helped shift public perception of the site. Facilities such as screened trails and observation towers balanced human use with wildlife needs, increasing the reserve’s socio-economic value without undermining conservation goals.
Finally, the project highlighted the importance of multifunctionality in wetland restoration. By improving biodiversity, water quality, and recreational opportunities, Škocjanski Zatok became a model for linking habitat restoration with broader community and regional benefits.
It's the first example in Slovenia of an NGO managing a protected area.
Success factor(s)
| Success factor type | Success factor role | Comments | Order |
|---|---|---|---|
|
Attitude of relevant stakeholders
|
main factor
|
<p>Cooperation: DOPPS, BirdLife Slovenia and the Ministry of the Environment and Spatial Planning have created firm and successful partnership for the organisation and management of Skocjanski zatok, which is quite unique in the field ofco-operation between governmental and non-governmental sectors in Slovenia.</p>
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1
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Financing possibilities
|
main factor
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Driver
| Driver type | Driver role | Comments | Order |
|---|---|---|---|
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Organisation committed to it
|
main driver
|
1
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Transferability
The restoration approach at Škocjanski Zatok is highly transferable to other degraded coastal wetlands, especially near urban or port areas, if strong stakeholder cooperation, long-term management, and diverse funding are secured. Key points to watch are sediment contamination handling, hydrological reconnection design, and balancing public access with habitat protection to avoid disturbance of sensitive species.
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