RT info:eu-repo/semantics/article
T1 The effect of hydrological variability on stepped fishways
A1 Fuentes Pérez, Juan Francisco
A1 Bravo Cordoba, Francisco Javier
A1 García Vega, Ana
A1 Eckert, Mario
A1 Branco, Paulo
A1 Sanz Ronda, Francisco Javier
K1 Fishway
K1 Non-uniformity
K1 Climatic uncertainty
K1 Hydrological variability
K1 PIT telemetry
K1 Upstream migration
K1 3105 Peces y Fauna Silvestre
K1 3105.04 Protección de Los Peces
AB River systems are highly dynamic, affecting all associated structures and their derived uses. This is particularly relevant for applications such as hydropower production and other water abstractions. This dynamic nature also extends to mitigation measures like fishways, which are vital for reducing the impact of river fragmentation on fish populations. Fishways must be designed to balance biological and hydraulic fish requirements, needing adaptability to varying boundary conditions. This study examines the effect of hydrological variability on fish passage through fishways, particularly for the Iberian barbel (Luciobarbus bocagei). We hypothesized that hydrological scenarios can significantly affect upstream fish passage. To test this, we conducted laboratory and field studies, assessing fish movement under different boundary conditions. We compared passage rates, time metrics, and their correlations with the evolution of fishway hydraulics, and employed survival analysis to determine biometric limits. Our findings show that hydrological changes markedly influenced fish passage rates and timings, producing fish size selection and highlighting the impact of factors such as maximum velocity and power dissipation in the studied metrics. These insights underline the necessity of incorporating hydrological variability into fishway design and management, enhancing their effectiveness for fish conservation in river ecosystems, particularly under growing climatic uncertainties. This research underscores and discusses the need for comprehensive, long-term hydrodynamic studies in fishway assessment and design, advocating for adaptive management strategies to accommodate environmental changes.
PB Elsevier
SN 0022-1694
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/73608
UL https://uvadoc.uva.es/handle/10324/73608
LA eng
NO Journal of Hydrology, noviembre 2024, vol. 643, 132001
NO Producción Científica
DS UVaDOC
RD 15-ene-2025