]> 2026-04-26T01:34:34+00:00 Case study:LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica 500 en project archive Approved Weir construction Bank reprofiling ,,,,,, Re-instatement of old course Creation of backwater Notranjski regijski park Dinaric Western Balkan Notranjska Regional Park Municipality of Cerknica Ministry of Environment and Spatial Planning Yes Yes Yes false ,,,,,, Lake Cerknica in autumn (Photo Notranjska Regional Park archive).png The Goriski Brezicek stream during the rainfall, January 2007.jpg Restoring the old riverbed of Goriski Brezicek (Photo Notranjska Regional Park archive)..jpg The Goriski Brezicek stream after restoration.png Restored meanders of Goriski Brezicek stream (Photo NRP archive).png Restored old riverbed of the Tresenec (Photo Notranjska Regional Park archive).jpg Tresenec in upper flow (Photo Notranjska Regional Park archive).jpg Lake Cerknica in autumn (Photo: Notranjska Regional Park archive) The Goriški Brežiček stream during the rainfall, January 2007. Straightened, regulated channel is seen in the foreground, while primary channel is seen in the background (Photo: Rok Fazarinc). Restoring the old riverbed of Goriški Brežička (Photo: Notranjska Regional Park archive). The Goriški Brežiček stream after restoration, partly flooded, during higher water surface (March 2010) (Photo: Rok Fazarinc). Restored meanders of Goriški Brežiček stream (Photo: Notranjska Regional Park archive). Restored old riverbed of the Tresenec (Photo: Notranjska Regional Park archive). Tresenec in upper flow (Photo: Notranjska Regional Park archive). No Ramsar Special Protection Area Special Area of Conservation 45.742550321109,14.36333656311 Tanja Notranjski regijski park Vasilevska late mowing and mulching on the permanently protected land mapping of habitat types Weir construction, Bank reprofiling,,Local deepening, Coves and bays construction, Construction of the overflows between individual meanders,Re-instatement of old course, Creation of backwater, ,late mowing and mulching on the permanently protected land,mapping of habitat types,Student Education,,popularization of the project,Information provision, ,,,,,, 779 ,,,,,, The regulated bed of Goriski Brezicek stream before restoration (Photo: Notranjski regijski park, http://life.notranjski-park.si/eng/project_threats.shtml) The regulated bed of Goriski Brezicek stream before restoration.jpg 2007-01 2454101.5 Complete In 2006 Notranjska Regional Park acquired financial support from European programme LIFE – Nature for project LIFE 06. The purpose of this project was the establishment of appropriate conditions for protection and conservation of animal and plant species and their habitats on Lake Cerknica. Factors that threaten the biodiversity on Lake Cerknica are modified watercourses, abandoning of meadow mowing and deficient knowledge of nature and its conservation. With the intention of maintaining biodiversity on Lake Cerknica efforts were oriented to following actions: * Restoration of watercourses, that would contribute to higher water ground level and retaining of overall water level on Lake Cerknica * Composition of a Management plan, which serves as groundwork for managing the project area and is orientated towards conservation of natural and cultural heritage of Lake Cerknica * Mapping of habitat types with the intention of conserving the endangered ones * Land managing including buying, late mowing and mulching on the permanently protected land. * Popularization of the project and education of the youth on the importance of nature conservation. The aim of the project was the restoration of former meanders and by doing so retaining the water longer in the dry period and increasing the groundwater level in wetland areas. It was expected that in this way the ecological conditions of the wetland areas, and thereby the living conditions for flora and fauna, improve. Inženiring za vode d.o.o. produced the project documentation, based on a review of the situation on the terrain and examining the location of riverbeds as they were before the regulating operations began. More than 12 km of watercourses in the Cerknica area are included in this study. Re-instatement of the old course and creation of backwater and water retention areas to encourage groundwater level rise and slower runoff of low waters. Community Involvement - education of the youth on the importance of nature conservation. <br> RESTORATION OF THE GORIŠKI BREŽIČEK STREAM: By restoring former meanders of the Goriški Brežiček stream it was intend to raise the groundwater level in the area of the Dujce fen which ranks among the qualifying habitats for determining the Natura 2000 areas, and thus restore appropriate conditions for sustaining this bog. The company TGM Bizjak, Dušan Bizjak s.p. completed the restoration works on approximately 500 m long section of upper stream and on 200 m in its lower part at the confluence with the Lipsenjščica stream. Expected results of this restoration: *slower runoff of low waters from the area of the intermittent lake, * ground water level rise, * retention of water in depressions and stream branches, consequently higher constant ground water level height and change in the soil – water rate. Restoring Goriški Brežiček stream was planned for the entire section, from the mill at the source, to its mouth in Lipsenjščica River, but only a part has been realized. The entire length of the stream has been straightened in the past, but given the terrain and vegetation, the original stream channel is still clearly visible. Restoring the original layout consisted of its deepening. Average width of the planned channel section was from 3.0 to 6.0 m. Excavation has been exercised in the form of U, with banks sloping 1:2, but it was planned that the transition slope of stream bank and terrain on majority of the length is carried out in a vertical slope and then let the water itself create a stable bank. It was assumed that the stability would be provided primarily by turf and partly by the riparian vegetation root system. Deepening of the stream bed at the juncture with the primary bottom at the upstream side has been protected by the small wooden weir (a small weir with the top corners at the bed level or just above it, which is not noticeable under normal hydrological conditions). Where possible, multiple channels with lower spills/overflows between the excavated meanders were predicted. Spills/overflows has been fortified with small wooden weirs (wooden piles, tree trunks) to prevent uncontrolled deepening of the spills/overflows. Spills/overflows were carried out above medium water level and they were covered with turf. At the appropriate locations at the contact of the current and planned section have also been carried out coves or bays, which are designed by keeping part of the current channel or in the area of inactive tributaries. RESTORATION OF THE TRESENEC STREAM: The restoration of the former riverbed of Tresenec stream from its source in the direction of Levišča sinkholes was undertook in order to raise the level of groundwater and thus enable the sustenance of characteristic water and river-bank plant communities. The Tresenec stream is also of great importance to the animal world since it is the only watercourse in the Lake Cerknica area that never runs dry and as such offers refuge for the water animals in the times of drought. On its banks you can still find elusive Otter’s (Lutra lutra) footprints. GRADBINKO d.o.o. enterprise completed the restoration on 650 m long section of the Tresenec stream. By increasing length of stream, restoring former branches and meanders, the water surface of the stream increased, which will have a positive effect on the conservation of aquatic, riparian and wetland habitats. LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica life 06 nat/slo/000069 intermittent lake cerknica http://life.notranjski-park.si/eng/index.shtml Yes Danube Danube River Basin District Local deepening Coves and bays construction Construction of the overflows between individual meanders Sava River sava river Goriški Brežiček stream, Trstenc stream goriški brežiček stream, trstenc stream Student Education 100 - 1000 km² 270 200 - 500 m Sava River REFERENCES LAYMAN’S REPORT Project LIFE 06 NAT/SLO/000069, Intermittent Lake Cerknica, Notranjska Regional Park, Cerknica, december 2009. Availabe at: http://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=LIFE06_NAT_SI_000069_LAYMAN.pdf Smolar-Žvanut N., Fazarinc R., Perič B., Blumauer S., Kavčič I. 2011. The restoration of tributaries of Cerknica Lake and Škocjan Caves Park. Seminar: Forging Targets and Solutions for Rivers and Water Ecosystem Restoration. Ljubljana, 16-18 November 2011. Habitat and biodiversity Hydromorphology Land use management - agriculture 1840 1000 - 5000 k€ SI141VT2 VTJ Cerkniško jezero (Cerknica lake) popularization of the project Information provision 2012-07-31T17:33:28Z 2456140.2315741 2019-01-02T16:01:45Z 2458486.1678819 LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica 500 1 plainlist 5 [[Category:Case study]] [[Project title::!LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica]] [[Subcatchment title::Sava River]] LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica# QUERY07a5acd172117676c71df7b42ad340a9 500 1 list 3 [[Category:Case study]] [[Parent project::Case study:LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica]] LIFE 06 NAT/SLO/000069 Intermittent Lake Cerknica# QUERY84755a96335c925748fe1cfce0a53a77 Case study:RESTORATION OF THE GORIŠKI BREŽIČEK STREAM 500 en RESTORATION OF THE GORIŠKI BREŽIČEK STREAM Case study:RESTORATION OF THE TRESENEC STREAM 500 en RESTORATION OF THE TRESENEC STREAM Parent project 102 en Parent project