Fish Guidance Structure with Wide Bar Spacing: Mechanical Behavioural Barrier

Abstract

AbstractThis chapter deals with the fish guidance structures (FGS) with wide bar spacing and focuses on Curved-Bar Rack-Bypass Systems (CBR-BS) (Beck 2020) for fish protection and fish guidance at water intakes. In: Boes RM (ed) VAW-Mitteilung, vol 257. VAW, ETH Zurich, Switzerland. https://vaw.ethz.ch/en/the-institute/publications/vaw-communications/2010-2019.html, Beck et al., J Hydraul Res 58:807–818, 2020a; Beck et al., J Hydraul Res 58:819–830, 2020b; Beck et al., Water 12:3244, 2020c). FGS with wider bar spacing are classified as mechanical behavioural barriers and designed for use mainly at run-of-river hydropower plants (HPPs) and water intakes with large design discharges. In the following, different types of the FGS with wide bar spacing are introduced and, fish guidance performance and design recommendations of CBR-BS are presented.