In spring and autumn 2019, video monitoring was carried out by the University of Natural Resources and Life Sciences, Vienna to check the fish-ecological function at the site. The Fishcon lock was rated as fully functional with a rating of 1 according to Austrian guidelines.
In addition to the total of 683 fish ascents, 305 fish descents were also documented in the study period of 104 days, despite a poor fish population of around 10 kg/ha in downstream water. The largest migrated fish was a brown trout, 420 mm long. The largest fish when fishing was 370 mm in length. The migration of all fish species identified during fishing and monitoring could be verified.
The Fishcon lock was installed in the course of the revitalisation of the Lippenannerl diversion power plant parallel next to the newly built residual water screw turbine and overcomes a height difference of approx.
Description
Numbers & Facts
Fish region: Metarhithral
Lead fish: Brown trout 50 cm height
Height difference: about 2 m
Attraction flow rate: 100 l/s
Water saving: 140 l/s compared to slot pass
Assessment: fully functional according to Austrian regulations and German standards
Implementation: end of 2018 / beginning of 2019
