Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil
The assessment of suspended-solids dynamics is crucial for the effective monitoring of estuarine environments. As the recurring in-situ sampling is usually problematic, the calibration of the backscattering from acoustic Doppler profilers has shown to be a reliable technique to estimate the suspende...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/5/646 |
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| author | Rafael André Ávila Priscila Mulattieri Suarez Orozco Mauro Michelena Andrade Osmar Olinto Möller |
| author_facet | Rafael André Ávila Priscila Mulattieri Suarez Orozco Mauro Michelena Andrade Osmar Olinto Möller |
| author_sort | Rafael André Ávila |
| collection | DOAJ |
| description | The assessment of suspended-solids dynamics is crucial for the effective monitoring of estuarine environments. As the recurring in-situ sampling is usually problematic, the calibration of the backscattering from acoustic Doppler profilers has shown to be a reliable technique to estimate the suspended-solids concentration (SSC) in estuaries and rivers. In this study, we obtained a linear model that provides SSC estimates for the estuarine channel of Patos Lagoon by calibrating turbidity and acoustic data with in-situ concentration samples. The model output was analyzed in terms of its relationship with estuarine hydrodynamics and temporal variability. In this estuary, the supply of suspended solids is known to be due the runoff from its main tributaries, but also through the exchanges between the estuary and the coastal ocean. Both sources provide sediments and organic solids which affect water quality, geomorphology, and harbor operations. Results show that SSC is strongly linked to estuarine hydrodynamics, where concentrations increase with streamflow. During outflow periods, higher concentrations are associated with river runoff, whereas with inflow conditions they are induced by southern and southwesterly winds. However, relationship between SSC and streamflow is asymmetrical, meaning that the largest concentrations are majorly linked to outflow currents and downstream transport. |
| first_indexed | 2024-03-09T06:13:24Z |
| format | Article |
| id | doaj.art-1e787ce1d2cf4571a6a5f684cfdaa043 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T06:13:24Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-1e787ce1d2cf4571a6a5f684cfdaa0432023-12-03T11:56:08ZengMDPI AGWater2073-44412021-02-0113564610.3390/w13050646Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern BrazilRafael André Ávila0Priscila Mulattieri Suarez Orozco1Mauro Michelena Andrade2Osmar Olinto Möller3Laboratório de Oceanografia Costeira e Estuarina, Instituto de Oceanografia, Universidade Federal do Rio Grande, Avenida Itália km 8, Rio Grande, RS 96203-900, BrazilLaboratório de Oceanografia Costeira e Estuarina, Instituto de Oceanografia, Universidade Federal do Rio Grande, Avenida Itália km 8, Rio Grande, RS 96203-900, BrazilLaboratório de Oceanografia Física, Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, Universidade do Vale do Itajaí, Escola do Mar, Ciência e Tecnologia, Rua Uruguai 458, Itajaí, SC 88302-901, BrazilLaboratório de Oceanografia Costeira e Estuarina, Instituto de Oceanografia, Universidade Federal do Rio Grande, Avenida Itália km 8, Rio Grande, RS 96203-900, BrazilThe assessment of suspended-solids dynamics is crucial for the effective monitoring of estuarine environments. As the recurring in-situ sampling is usually problematic, the calibration of the backscattering from acoustic Doppler profilers has shown to be a reliable technique to estimate the suspended-solids concentration (SSC) in estuaries and rivers. In this study, we obtained a linear model that provides SSC estimates for the estuarine channel of Patos Lagoon by calibrating turbidity and acoustic data with in-situ concentration samples. The model output was analyzed in terms of its relationship with estuarine hydrodynamics and temporal variability. In this estuary, the supply of suspended solids is known to be due the runoff from its main tributaries, but also through the exchanges between the estuary and the coastal ocean. Both sources provide sediments and organic solids which affect water quality, geomorphology, and harbor operations. Results show that SSC is strongly linked to estuarine hydrodynamics, where concentrations increase with streamflow. During outflow periods, higher concentrations are associated with river runoff, whereas with inflow conditions they are induced by southern and southwesterly winds. However, relationship between SSC and streamflow is asymmetrical, meaning that the largest concentrations are majorly linked to outflow currents and downstream transport.https://www.mdpi.com/2073-4441/13/5/646suspended-solids concentrationacoustic signal backscatterPatos Lagoon estuarytemporal variability |
| spellingShingle | Rafael André Ávila Priscila Mulattieri Suarez Orozco Mauro Michelena Andrade Osmar Olinto Möller Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil Water suspended-solids concentration acoustic signal backscatter Patos Lagoon estuary temporal variability |
| title | Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil |
| title_full | Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil |
| title_fullStr | Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil |
| title_full_unstemmed | Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil |
| title_short | Temporal Variability of Suspended-Solids Concentration in the Estuarine Channel of Patos Lagoon, Southern Brazil |
| title_sort | temporal variability of suspended solids concentration in the estuarine channel of patos lagoon southern brazil |
| topic | suspended-solids concentration acoustic signal backscatter Patos Lagoon estuary temporal variability |
| url | https://www.mdpi.com/2073-4441/13/5/646 |
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