Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil)
This study investigated the seasonality of low-flow discharges in the Tibagi watershed, Paraná, Brazil, through the analysis of three indices: Seasonality Ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mro...
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2025-01-01
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| author | Alexandre Sokoloski de Azevedo Delduque de Macedo Michael Männich |
| author_facet | Alexandre Sokoloski de Azevedo Delduque de Macedo Michael Männich |
| author_sort | Alexandre Sokoloski de Azevedo Delduque de Macedo |
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| description | This study investigated the seasonality of low-flow discharges in the Tibagi watershed, Paraná, Brazil, through the analysis of three indices: Seasonality Ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>R</mi></mrow></semantics></math></inline-formula>), Seasonality Index (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>I</mi></mrow></semantics></math></inline-formula>), and Seasonality Histogram (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>H</mi></mrow></semantics></math></inline-formula>). The indices were computed and compared using previously calculated low-flow discharge data (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>Q</mi><mn>95</mn></msub></semantics></math></inline-formula>) and physiographic information on sub-watersheds. A ‘Seasonality Calendar’ was developed, illustrating the period and intensity of low-flow discharge occurrences in the watershed. The results indicate that, despite the watershed not presenting a strong seasonality, there is a tendency for low-flow discharges to concentrate in certain months, notably in August, September, and October. Spatial analysis reveals varied patterns with a certain trend of increased seasonality intensity (parameter <i>r</i>) towards downstream (north) and as the watershed area increases. These indices emerge as valuable tools for water resource management, aiding decision-making for allocation and hydrological regionalization, such as optimizing granting water resource distribution during dry seasons based on the identified low-flow patterns and establishing different reference low-flow values throughout the year. |
| format | Article |
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| institution | Kabale University |
| issn | 2306-5338 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Hydrology |
| spelling | doaj-art-b1a3431cfcc244cfb447ca771051cfbc2025-01-24T13:34:56ZengMDPI AGHydrology2306-53382025-01-011211910.3390/hydrology12010019Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil)Alexandre Sokoloski de Azevedo Delduque de Macedo0Michael Männich1Department of Environmental Engineering, Federal University of Paraná, Centro Politécnico, Curitiba 81531-980, PR, BrazilDepartment of Environmental Engineering, Federal University of Paraná, Centro Politécnico, Curitiba 81531-980, PR, BrazilThis study investigated the seasonality of low-flow discharges in the Tibagi watershed, Paraná, Brazil, through the analysis of three indices: Seasonality Ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>R</mi></mrow></semantics></math></inline-formula>), Seasonality Index (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>I</mi></mrow></semantics></math></inline-formula>), and Seasonality Histogram (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>S</mi><mi>H</mi></mrow></semantics></math></inline-formula>). The indices were computed and compared using previously calculated low-flow discharge data (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>Q</mi><mn>95</mn></msub></semantics></math></inline-formula>) and physiographic information on sub-watersheds. A ‘Seasonality Calendar’ was developed, illustrating the period and intensity of low-flow discharge occurrences in the watershed. The results indicate that, despite the watershed not presenting a strong seasonality, there is a tendency for low-flow discharges to concentrate in certain months, notably in August, September, and October. Spatial analysis reveals varied patterns with a certain trend of increased seasonality intensity (parameter <i>r</i>) towards downstream (north) and as the watershed area increases. These indices emerge as valuable tools for water resource management, aiding decision-making for allocation and hydrological regionalization, such as optimizing granting water resource distribution during dry seasons based on the identified low-flow patterns and establishing different reference low-flow values throughout the year.https://www.mdpi.com/2306-5338/12/1/19seasonalitylow flowTibagi watershed |
| spellingShingle | Alexandre Sokoloski de Azevedo Delduque de Macedo Michael Männich Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil) Hydrology seasonality low flow Tibagi watershed |
| title | Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil) |
| title_full | Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil) |
| title_fullStr | Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil) |
| title_full_unstemmed | Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil) |
| title_short | Exploring Seasonality Indices for Low-Flow Analysis on Tibagi Watershed (Brazil) |
| title_sort | exploring seasonality indices for low flow analysis on tibagi watershed brazil |
| topic | seasonality low flow Tibagi watershed |
| url | https://www.mdpi.com/2306-5338/12/1/19 |
| work_keys_str_mv | AT alexandresokoloskideazevedodelduquedemacedo exploringseasonalityindicesforlowflowanalysisontibagiwatershedbrazil AT michaelmannich exploringseasonalityindicesforlowflowanalysisontibagiwatershedbrazil |