Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex
The Mundaú-Manguaba Estuary Lagoon Complex is located on the coast of Alagoas state in Northeastern Brazil, and consists of two shallow lagoons, Mundaú and Manguaba, that form a system of choked lagoons which are connected to the Atlantic Ocean by a series of narrow channels with a single outlet whi...
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| Format: | Article |
| Language: | English |
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Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
2021-04-01
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| Series: | Revista Ambiente & Água |
| Subjects: | |
| Online Access: | https://www.scielo.br/j/ambiagua/a/zXBxWWppzSwgS75nk9f7swh/?lang=en |
| _version_ | 1818392569539723264 |
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| author | Cynara de Lourdes da Nóbrega Cunha Ada Cristina Scudelari Danilo de Oliveira Sant'Ana Teresa Elane Bezerra Luz Mariana Kummer da Rocha Pinheiro |
| author_facet | Cynara de Lourdes da Nóbrega Cunha Ada Cristina Scudelari Danilo de Oliveira Sant'Ana Teresa Elane Bezerra Luz Mariana Kummer da Rocha Pinheiro |
| author_sort | Cynara de Lourdes da Nóbrega Cunha |
| collection | DOAJ |
| description | The Mundaú-Manguaba Estuary Lagoon Complex is located on the coast of Alagoas state in Northeastern Brazil, and consists of two shallow lagoons, Mundaú and Manguaba, that form a system of choked lagoons which are connected to the Atlantic Ocean by a series of narrow channels with a single outlet which dynamically alters its position. This study uses the Hydrodynamic Environmental System, SisBaHiA® to investigate how variations in river discharge and wind influence hydrodynamic circulation, water renewal, salinity and temperature in the lagoons. The free surface positions, obtained by model, were compared with the free surface positions measured at two points of the complex, showing good agreement. The analyses were carried out for dry and wet seasons and extreme events with very high freshwater discharge. The channel system of the lagoons is an efficient filter in reducing tidal variability inside the lagoons. The tidal ranges in the Manguaba and Mundaú Lagoons are 90% and 80% lower, respectively, as compared with the values in the open boundary. The residence time calculated varied between 11 and 365 days and between 2 and 180 days for the Manguaba and Mundaú Lagoons, respectively, making it possible to identify possible stagnation areas. The results from the salt and heat transport model show a prolonged period with low salt concentrations and slow salinity recovery after the rainy season; the water temperature in the lagoons shows little spatial and temporal variation. |
| first_indexed | 2024-12-14T05:31:30Z |
| format | Article |
| id | doaj.art-690a208ed9b14394a43410b726d62d82 |
| institution | Directory Open Access Journal |
| issn | 1980-993X |
| language | English |
| last_indexed | 2024-12-14T05:31:30Z |
| publishDate | 2021-04-01 |
| publisher | Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi) |
| record_format | Article |
| series | Revista Ambiente & Água |
| spelling | doaj.art-690a208ed9b14394a43410b726d62d822022-12-21T23:15:20ZengInstituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)Revista Ambiente & Água1980-993X2021-04-0116211810.4136/ambi-agua.2600Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complexCynara de Lourdes da Nóbrega Cunha0https://orcid.org/0000-0002-0005-467XAda Cristina Scudelari1https://orcid.org/0000-0001-7594-1196Danilo de Oliveira Sant'Ana2https://orcid.org/0000-0002-5097-6728Teresa Elane Bezerra Luz3https://orcid.org/0000-0002-8563-0698Mariana Kummer da Rocha Pinheiro4https://orcid.org/0000-0001-6298-4584Departamento de Engenharia Ambiental. Universidade Federal do Paraná (UFPR), Avenida Coronel Francisco Heráclito dos Santos, nº 100, CEP: 81530-000, Curitiba, PR, Brazil. Laboratório de Geotecnologias Aplicadas, Modelagens Costeira e Oceânica (GNOMO). Departamento de Engenharia Civil. Universidade Federal do Rio Grande do Norte (UFRN), Campus Universitário, s/n, CEP: 59078-970, Natal, RN, Brazil. Departamento de Engenharia Ambiental. Universidade Federal do Paraná (UFPR), Avenida Coronel Francisco Heráclito dos Santos, nº 100, CEP: 81530-000, Curitiba, PR, Brazil. Laboratório de Geotecnologias Aplicadas, Modelagens Costeira e Oceânica (GNOMO). Departamento de Engenharia Civil. Universidade Federal do Rio Grande do Norte (UFRN), Campus Universitário, s/n, CEP: 59078-970, Natal, RN, Brazil. Laboratório de Geotecnologias Aplicadas, Modelagens Costeira e Oceânica (GNOMO). Departamento de Engenharia Civil. Universidade Federal do Rio Grande do Norte (UFRN), Campus Universitário, s/n, CEP: 59078-970, Natal, RN, Brazil. The Mundaú-Manguaba Estuary Lagoon Complex is located on the coast of Alagoas state in Northeastern Brazil, and consists of two shallow lagoons, Mundaú and Manguaba, that form a system of choked lagoons which are connected to the Atlantic Ocean by a series of narrow channels with a single outlet which dynamically alters its position. This study uses the Hydrodynamic Environmental System, SisBaHiA® to investigate how variations in river discharge and wind influence hydrodynamic circulation, water renewal, salinity and temperature in the lagoons. The free surface positions, obtained by model, were compared with the free surface positions measured at two points of the complex, showing good agreement. The analyses were carried out for dry and wet seasons and extreme events with very high freshwater discharge. The channel system of the lagoons is an efficient filter in reducing tidal variability inside the lagoons. The tidal ranges in the Manguaba and Mundaú Lagoons are 90% and 80% lower, respectively, as compared with the values in the open boundary. The residence time calculated varied between 11 and 365 days and between 2 and 180 days for the Manguaba and Mundaú Lagoons, respectively, making it possible to identify possible stagnation areas. The results from the salt and heat transport model show a prolonged period with low salt concentrations and slow salinity recovery after the rainy season; the water temperature in the lagoons shows little spatial and temporal variation.https://www.scielo.br/j/ambiagua/a/zXBxWWppzSwgS75nk9f7swh/?lang=enhydrodynamic circulationmundaú/manguaba lagoon estuary complexresidence time |
| spellingShingle | Cynara de Lourdes da Nóbrega Cunha Ada Cristina Scudelari Danilo de Oliveira Sant'Ana Teresa Elane Bezerra Luz Mariana Kummer da Rocha Pinheiro Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex Revista Ambiente & Água hydrodynamic circulation mundaú/manguaba lagoon estuary complex residence time |
| title | Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex |
| title_full | Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex |
| title_fullStr | Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex |
| title_full_unstemmed | Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex |
| title_short | Effects on circulation and water renewal due to the variations in the river flow and the wind in a Brazilian estuary lagoon complex |
| title_sort | effects on circulation and water renewal due to the variations in the river flow and the wind in a brazilian estuary lagoon complex |
| topic | hydrodynamic circulation mundaú/manguaba lagoon estuary complex residence time |
| url | https://www.scielo.br/j/ambiagua/a/zXBxWWppzSwgS75nk9f7swh/?lang=en |
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