Device for preventing the introduction of foreign substances into fish passage facilities

Abstract

The invention relates to a device for preventing the introduction of foreign matter into fish passage facilities, designed as a movable, water-permeable screen element (13) positioned at the upstream connection (11) of the fish passage facility (10), which can temporarily cover the upstream connection (11) to prevent the introduction of foreign matter (17) such as screenings during the fine screen cleaning of a hydroelectric power plant, or designed as a supply device (14) which temporarily directs or pumps water into the upper area of ​​the fish passage facility (10), so that at these times less or no water flows from the upstream water (1) through the upstream connection (11) of the fish passage facility (10) into the fish passage facility (10).or the supplied water completely takes over the guiding current supply of the fish passage aid (10) and additionally a small part of the supplied water flows through the upstream connection (11) towards the upstream water (1).