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• W3131648912 endingPage "116822" @default.
• W3131648912 startingPage "116822" @default.
• W3131648912 abstract "Hydrodynamic conditions often affect the eutrophication process and play a key role in algal growth in reservoirs. A promising approach for controlling algal blooms in reservoirs is to create adverse hydrodynamic conditions by implementing reservoir operation strategies. However, research on this method is still nascent and does not support practical applications due to the lack of quantitative hydrodynamic thresholds. In this paper, field observations of algal growth from April 2015 to August 2016 were conducted, and a three-dimensional (3D) model that couples hydrodynamics and water temperatures for the Zipingpu Reservoir was established. Low flow velocities (V) and low Reynolds numbers (Re) in the Longchi tributary are favorable for dinoflagellate growth and accumulation, which can explain why dinoflagellate blooms are more likely to occur in the tributary. A temperature of 18–22 °C is considered a precondition for Peridiniopsis penardii blooms, suggesting that freshwater dinoflagellate species may prefer lower temperatures than marine dinoflagellate species. Shallow mixing layer depth (Zmix) is conducive to Peridiniopsis penardii gathering in the upper water layers and promotes growth. The shallow euphotic layer depth (Zeu) was speculated to promote the dominance of this species by stimulating its heterotrophy and inhibiting other algal autotrophy. Furthermore, a boundary line analysis was introduced to characterize the relationships between algal biomass and hydrodynamic indicators. Thus, the thresholds for V, Re, and Zmix/Zeu were determined to be 0.034 m s−1, 6.7 × 104, and 1.7, respectively. Either accelerating horizontal flow to exceed the thresholds of V and Re or facilitating vertical mixing to exceed the threshold of Zmix/Zeu can prevent dinoflagellate blooms. Therefore, the summarized hydrodynamic threshold system is suggested to be an effective standard for controlling dinoflagellate blooms in the reservoir. Moreover, this study can provide a useful reference for understanding the mechanism of freshwater dinoflagellate blooms." @default.
• W3131648912 created "2021-03-01" @default.
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• W3131648912 date "2021-06-01" @default.
• W3131648912 modified "2023-10-18" @default.
• W3131648912 title "Study of a hydrodynamic threshold system for controlling dinoflagellate blooms in reservoirs" @default.
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• W3131648912 doi "https://doi.org/10.1016/j.envpol.2021.116822" @default.
• W3131648912 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33677223" @default.
• W3131648912 hasPublicationYear "2021" @default.
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