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Integratingtwo‐dimensional watertemperaturesimulations into afish habitat model toimprove hydro‐ andthermopeaking impactassessment Manuel AntonettiLuca HopplerDiego Tonolla2022 год

Integrating two‐dimensional water temperature simulations into a fish habitat model to improve hydro‐ and thermopeaking impact assessment
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Аннотация: Abstract Storage hydropower plants, which are an important component of energy production in Switzerland, can lead to hydro‐ and thermopeaking, affecting river habitats and organisms. In this study, we developed an approach for integrating water temperature simulations into a habitat model to assess the impact of both hydro‐ and thermopeaking on the availability of suitable fish habitats. We focused on the habitat requirements of juvenile brown trout ( Salmo trutta ) in a semi‐natural braided floodplain along the Moesa River (Southern Switzerland) in early summer. First, we defined different scenarios (with and without hydropeaking) based on the local hydrological and meteorological conditions. Second, we used a two‐dimensional depth‐averaged hydro‐ and thermodynamic model to simulate the spatial distributions of water depth, flow velocity, and water temperature. Third, we applied generalized preference curves for juvenile brown trout to identify hydraulically suitable habitats, and developed a new index to assess the availability of thermally suitable habitats. Finally, we quantified the extent to which hydraulically and thermally suitable habitats overlap in space and time. During both base and peak flow phases, most of the hydraulically and thermally suitable habitats are located in the side channels. High flow conditions combined with strong cold‐thermopeaking lead to a higher thermal heterogeneity. However, disconnected habitats originate in the dewatering zone, increasing the risk of stranding as well as thermal stress. By helping to better understand the effects of thermopeaking on the availability of fish habitats, our approach could contribute to the design and evaluation of ecological restoration in hydropeaking rivers.
Год издания: 2022
Авторы: Manuel Antonetti, Luca Hoppler, Diego Tonolla, Davide Vanzo, Martin Schmid, Michael Doering
Издательство: Wiley
Источник: River Research and Applications
Ключевые слова: Fish Ecology and Management Studies, Hydrology and Sediment Transport Processes, Hydrology and Watershed Management Studies
Другие ссылки: River Research and Applications (HTML)
DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (PDF)
DORA Eawag (Swiss Federal Institute of Aquatic Science and Technology (Eawag)) (HTML)
Repository for Publications and Research Data (ETH Zurich) (PDF)
Repository for Publications and Research Data (ETH Zurich) (HTML)
Zürcher Hochschule für Angewandte Wissenschaften digital collection (Zurich University of Applied Sciences) (PDF)
Zürcher Hochschule für Angewandte Wissenschaften digital collection (Zurich University of Applied Sciences) (HTML)