Sedimentary dynamics at Macuti beach: morphodynamics and coastal erosion in the city of Beira, Mozambique
DOI:
https://doi.org/10.21814/physisterrae.6225Keywords:
Sediment transport dynamics, Morphodynamics, Grain-size analysis, ErosionAbstract
The article addresses the sediment transport and distribution dynamics at Macuti Beach, located in the city of Beira, Mozambique (Africa), which holds significant socio-economic importance due to fishing, tourism, and leisure activities. The coastal area is subject to continuous morphodynamic changes influenced by continental and marine processes, such as tides, waves, and currents. The study focuses on the impacts of erosion on the beach, which has undergone changes due to sediment depletion and the construction of protective structures, such as groins.
The research methodology included field data collection at three beach sectors (north, central, and south), grain-size analysis of the sediments, and topographic profile monitoring to observe changes in the shoreline. The results suggest that the beach is mainly composed of medium-grained, well-sorted sand, with variations in grain-size parameters. The analysis of the topographic profiles indicates moderate variation in beach slope and the width of the beach zone.
The research highlighted the influence of human interventions on sediment dynamics and the environmental impacts, such as the destruction of coastal dunes and sediment accumulation in some areas. The study provides a foundation for understanding sedimentation processes on the beach and the effects of coastal engineering works, which are essential for beach management and environmental impact mitigation.
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References
Bird, E. (1996). Lateral Grading of Beach Sediments: A Commentary. Journal of Coastal Research, 12(3), 774–785. http://www.jstor.org/stable/4298523
Carter, R. W. G. (1998). Coastal Environments: an Introduction to the Physical, Ecological and Cultural Systems of Coastlines. 6. Ed. London: Academic Press.
Consultec (2007). Estudo Ambiental Simplificado da Dragagem do Canal de Acesso ao Porto da Beira. Relatório final.
Dias, J. M. A., & Silva, A. P. (2003). A Erosão nas Costas Arenosas. Jornadas do Mar 2002. Escola Naval, Alfeite, Portugal.
Giannini, P. C. F. (1993). Sistemas deposicionais no quaternário costeiro entre Jaguaruna e Imbituba, SC. Tese de Pós-graduação. Instituto de Geociências, Universidade de São Paulo, São Paulo.
JICA (1998). The Study for the maintenance and improvement Plan of access Channel of Beira Port in the Republic of the Mozambique.
Klein, A. H. da F., & Menezes, J. T. (2001). Beach morphodynamics and profile sequence for a headland bay coast. Journal of Coastal Research, 17(4), 812-835. Disponível em: https://journals.flvc.org/jcr/article/view/81507
Komar, P. D. (1976). Beach processes and sedimentation (2th edition). New Jersey: Prentice-Hall.
Lämmle, L., Filho, A. P., Donadio, C., Moreira, V. B., de Jesus Santos, C., & Oliveira Souza, A. (2022). Low marine terraces associated with holocenic marine transgressions and regressions in the Coastal Plain of the Paraiba do Sul River, Rio de Janeiro, Brazil. Revista Brasileira de Geomorfologia, 23(2), 1285–1303. https://doi.org/10.20502/rbg.v23i2.1992
Levoy, F., Anthony, E. J., Monfort, O., & Larsonneur C. (2000). The morphodynamics of megatidal beaches in Normandy, France. Marine Geology, 171(1-4), 39-59. https://doi.org/10.1016/S0025-3227(00)00110-9
Luis, A. (2011). Aplicação dos sistemas de informação geográfica e detecção remota no monitoramento do mangal. Estudo de caso: cidade da Beira. Dissertação de mestrado. UCM. Disponível em: http://sugik.isegi.unl.pt/documentos/doc_86_1.pdf
Manuel, A. (2015). Análise da perigosidade de tsunami para a cidade da Beira, Moçambique. Dissertação de mestrado. FCUL. http://hdl.handle.net/10451/18025
Masselink, G. (1992). Longshore variation of grain size distribution along the coast of the Rhone Delta, Southern France: a test of the “McLaren model”. Journal of Coastal Research, 8(2), 286-291. Disponível em: https://journals.flvc.org/jcr/article/view/78697
Mazzer, A. M., Dillenburg, S. R., & Souza, C. R. (2008). Proposta de método para análise de vulnerabilidade à erosão costeira no sudeste da ilha de Santa Catarina, Brasil. Revista Brasileira de Geociencias, 38(2), 278-294. https://doi.org/10.25249/0375-7536.2008382278294
Medina, J., & Uacane, M. S. (2024). Uma breve análise teórica sobre a evolução da linha costeira da cidade da beira (moçambique). Cadernos do LOGEPA, 11. https://doi.org/10.22478/ufpb.2237-7522.2023v11.69312
Muehe, Dieter (2005). Aspectos gerais da erosão costeira no Brasil. Mercator, 4(7), 97-110. Disponível em: http://www.mercator.ufc.br/mercator/article/view/113
Nicholls, R. J., Birkemeier, W. A., & Lee, G.-H. (1998). Evaluation of depth of closure using data from Duck, NC, USA. Marine Geology, 148(3-4), 179-201. https://doi.org/10.1016/S0025-3227(98)00011-5
Nzualo, T. (2010). Estudo hidrodinâmico e ambiental do estuário da Beira – Moçambique. Dissertação de Mestrado, UFRJ. Disponível em: https://w1files.solucaoatrio.net.br/atrio/ufrj-peno_upl//THESIS/10001567/2010_mestrado_teodosio_das_neves_milisse_nzualo_reduzed_20210730135238539.pdf
Oceanweather (2006). GROW – Global Reanalysis Ocean Waves. Disponível em: https://www.oceanweather.com/metocean/grow/index.html
Quental, L., Oliveira, T, Dias, R., Batista, M., & Fernandes, J. (2009). Land cover characterization and change detection using multispectral imagery for the Beira area, Mozambique: a preliminary approach. Proceedings of the 33rd International Symposium of Remote Sensing of the Environment (ISRSE). Joint Research Centre. http://hdl.handle.net/10400.9/631
Scott, T., Masselink, G., & Russell, P. (2011). Morphodynamic characteristics and classification of beaches in England and Wales. Marine Geology, 286(1–4), 1–20. https://doi.org/10.1016/j.margeo.2011.04.004
Short, A. (1999). Handbook of Beach and Shoreface Morphodinamics. Chichester: Wiley, 379 p.
Short, A. D. (1999). Beaches. In: Short, A. D. (Ed.) Handbook of beach and shoreface morphodynamics. Chichester, John Wiley & Sons.
Silva, C. G. (1993). Estudo da evolução geológica e geomorfológica da região da Lagoa Feia. Anuário Do Instituto de Geociências, 16, 84–84. https://doi.org/10.11137/1993_0_84-84
Silva, G. M., Klein, A. H. F., & Almeida, L. E. S. B. (2006). Effect of planform equilibrium state in the sedimentology of headland bay beaches. Journal of Coastal Research, SI 39 (Proceedings of the 8th International Coastal Symposium), 692-696. Disponível em: https://www.jstor.org/stable/25741666
Souza-Filho, P. W. M., & Paradella, W. R. (2002). Recognition of the main geobotanical features along the Bragança mangrove coast (Brazilian Amazon Region) from Landsat TM and RADARSAT-1 data. Wetlands Ecology and Management, 10, 123-132. https://doi.org/10.1023/A:1016527528919
Souza-Filho, P. W. M, & Pardella, W. R. (2003). Use of synthetic aperture radar for recognition of Coastal Geomorphological Features, land-use assessment and shoreline changes in Bragança coast, Pará, Northern Brazil. Annals of the Brazilian Academy of Sciences, 75(3), 341-356. https://doi.org/10.1590/S0001-37652003000300007
Souza, D. C., Ramos-da-Silva, R. (2021) Ocean-Land Atmosphere Model (OLAM) performance for major extreme meteorological events near the coastal region of southern Brazil. Climate Research, 84, 1-21. https://doi.org/10.3354/cr01651
Souza, T., Bulhões, E., Amorim, I. (2015). Ondas de tempestade na Costa Norte Fluminense. Quaternary and Environmental Geosciences, 6(2), 10–17. https://doi.org/10.5380/abequa.v6i2.41139
Suguio, K. (1973). (1973). Rochas Sedimentares: Propriedades, Gênese e Importância Económica. São Paulo: Edgard Blucher.
Theron, A. K. & Barwell, L. (2012). Responding to climate change in Mozambique: Theme 2: Coastal planning and adaptation to mitigate climate change impacts. Stellenbosch: CSIR.
Uacane, M. S. (2018). Contribuição de fatores humanos na dinâmica da cobertura especial das áreas do mangal na Beira (1984-2014). Tese de Doutoramento. UPM.
Wright, L. D., & Short, A. D. (1984). Morphodynamic variability of surf zones and beaches: a synthesis. Marine Geology, 56(1–4), 93–118. https://doi.org/10.1016/0025-3227(84)90008-2
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