]> 2026-04-04T21:27:14+00:00 Case study:HPP Blanca 500 en Approved New riverbed along old channel Yes Fish: Species composition,,Yes,,,, Fish: Abundance,,Yes,,,, Fish: Disturbance-sensitive species,,Yes,,,, Fish: Age structure,,Yes,,,, Fish: Species composition Fish: Abundance Fish: Disturbance-sensitive species Fish: Age structure Creation of fish passes HESS d.o.o. Dinaric Western Balkan No No Yes false Yes Flow velocities,,Yes,,,, Flow velocities Fish pass after construction (Foto HESS d. o . o. archive)..png Electrofishing (on the left) and sampling with fishing net (on the right) on Blanca HPP (photo D. Zabric)..png Fish pass after construction (Foto: HESS d. o . o. archive). Electrofishing (on the left) and sampling with fishing net (on the right) on Blanca HPP (photo: D. Zabric). No Fisheries Research Institute of Slovenia Fisheries Research Institute of Slovenia 45.991251,15.381251 HESS d. o. o. HESS d.o.o. HESS d. o. o. Monitoring strategy New riverbed along old channel,,Creation of fish passes, ,Monitoring strategy,,Improved cooperation between energy producers and ecologists, Fisheries Research Institute of Slovenia After the construction of HPP and fish way in 2009 the monitoring began and is still going on. The method used was electrical hunting and fish nets. In 2011 also telemetry was included in monitoring. Results showed that 32 of 40 fish in Sava river on the area of HPP Blanca was evidenced in the fish way (among them also ''Chrondrostoma nasus''), since the beginning of the monitoring, which is good result. The base for this project, which was done by IBE d. d., was interest in fish species composition in lower Sava river, the assessment of population size for each species, biological characteristics and ecological needs of species. Recommended guidelines and literature about fish passes were basis for the project scheme. The fish experts from Fisheries Research Institute of Slovenia were included in the project from the beginning, which is very good progress in cooperation between experts and energy producers. Even more progress can be done with founding the permanent monitoring of fish way function and maintenance (http://www.he-ss.si/pdf/he_blanca-primer_dobre_prakse.pdf). Monitoring of fish in the fish pass. 773 HPP Blanca and the fishway on the right part of the dam (http://www.he-ss.si/pdf/he_blanca-primer_dobre_prakse.pdf). . HPP Blanca and the fishway on the right part of the dam.png 2009-01-01Z 2454832.5 Complete The fish pass on HPP Blanca is the first case of fish way on Sava river HPPs. It is located on the right part of HPP Blanca dam and constructed in the way of imitation of natural watercourse with hydrological characteristics, morphology, materials and varied habitat. The water level in the accumulation lake is changing for 1 m on the daily basis, which is why the inflow in fish pass has vertical slot pass with hydraulic barriers. Water velocity in the fish pass does not exceed 1 m/s. The flow is adjusted on fish migration and hydraulic scheme of the accumulation lake (http://www.he-ss.si/pdf/he_blanca-primer_dobre_prakse.pdf). In order to bridge the differences in elevation, which is 9.4 m, the length of crossing is 680 m. Of these, 110 m of concrete section (intake facility on the upstream side) and 570 m of sustainable segment, in which also the culvert under a public road and drainage section is included (designed to attract fish). Water outflow from the fish pass itself attracts fish (http://www.he-ss.si/pdf/kratek-opis.pdf). HPP Blanca hpp blanca http://www.he-ss.si/pdf/he_blanca-primer_dobre_prakse.pdf No Danube Danube River Basin District Sava River sava river River Sava near settlement Blanca river sava near settlement blanca Improved cooperation between energy producers and ecologists 100 - 1000 km² 270 200 - 500 m Sava River REFERENCES: HESS d. o. o. Brežice. 2010. Prehod za vodne organizme na HE Blanca. Availabe at: http://www.he-ss.si/pdf/kratek-opis.pdf Zabric D. 2011. Prehodi za ribe pri HE Blanca – primer dobre prakse. Življenje vodi, str. 19–22. Availabe at: http://www.he-ss.si/pdf/he_blanca-primer_dobre_prakse.pdf Zabric, D. 2010. Ihtiološki pregled na HE Boštanj in HE Blanca - Monitoring ribje steze HE Blanca. / Ichtyological research at the HPP Boštanj and HPP Blanca – Monitoring of the fish migration aid at HPP Blanca. Report. Ljubljana. Zabric, D., Jenic, A., Videmšek, U. 2012. Ihtiološki pregled na HE Boštanj in HE Blanca v letu 2012. / Ichtyological research at the HPP Boštanj and HPP Blanca in 2012. Report. Ljubljana. Fisheries Hydropower SI1VT739 VT Sava Boštanj – Krško 2009-08-01Z 2455044.5 2009-01-01Z 2454832.5 2012-07-31T17:33:24Z 2456140.2315278 2019-01-02T15:19:40Z 2458486.1386574 HPP Blanca 500 1 plainlist 5 [[Category:Case study]] [[Project title::!HPP Blanca]] [[Subcatchment title::Sava River]] HPP Blanca# QUERY360da0c329ba352e8c9ee7074ea4f71b