Shoreline Changes and Coastal Evolution as Parameters to Identify Priority Areas for Management in Rio Grande do Sul, Brazil

Autores

DOI:

https://doi.org/10.22456/1807-9806.19571

Palavras-chave:

beach erosion, coastal management, DGPS

Resumo

About 80% of the Rio Grande do Sul coastline is undeveloped. The state Program of Coastal Management is incipient and has addressed only the northern coastal sector, which concentrates most of the developed beaches in the state. The central and southern coastal sectors show ideal conditions to the implementation of a regional management plan based on measures that regulate occupation and uses. This study identifies classes of management for RS beaches based on: (a) rates of population growth from 1991 to 2000, (b) intensity of beachfront development and the state of conservation of the beach system, (c) shoreline changes from 1997 to 2002, and (d) coastal evolution in the Holocene. Four classes of management are defined: (1) critical areas, are highly developed or show a recent trend of increasing population, are eroding or accreting with large magnitudes of shoreline changes, and require corrective measures; (2) priority areas, are low to moderately developed but show a potential for intensification of occupation and uses in the near future, are eroding and show large magnitudes of shoreline movements, they require urgent regulation to restrict development and uses; (3) areas of future concern, are not under pressure at present and consist of eroding shores located close to critical or priority areas, regulation measures are recommended, and (4) natural areas, are mainly preserved, eroding or accreting, with no signs of changes in the near future. About 198 km (32% of the RS coastal length) are classified as priority areas (located along the central sector), 178 km (29%) as natural areas (in the southern coast of São José do Norte and between Cassino and Albardão), 177 km (29%) as critical areas (northern sector, Cassino, and between Chuí and Hermenegildo), and 65 km (10%) as areas of future concern (beaches from Hermenegildo to Albardão).

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Referências

Calliari, L. J., & Klein, A.H.F. 1993. Características morfodinâmica e sedimentológicas das praias oceânicas entre Rio Grande e Chuí, RS. Pesquisas, 20(1): 48-56.

Calliari, L. J.; Tozzi, H. A. M. & Klein, A.H.F. 1998. Beach morphology and coastline erosion associated with storm surges in southern Brazil – Rio Grande to Chuí. Anais da Academia Brasileira de Ciências, 70(2): 231-247.

Cendrero, A. 1989. Land-use problems, planning and management in the coastal zone; an introduction. Ocean and Shoreline Management, 12(5-6): 367-381.

Cicin-Sain, B. & Knecht, R. W. 1998. Integrated Coastal and Ocean Management: Concepts and Practices. Washington, DC, Island Press, 517 p.

Dillenburg, S. R.; Roy, P. S.; Cowell, P. J. & Tomazelli, L. J. 2000. Influence of antecedent topography on coastal evolution as tested by the Shoreface Translation-Barrier Model (STM). Journal of Coastal Research, 16(1): 71-81.

Dillenburg, S. R.; Tomazelli, L. J. & Barboza, E. G. 2004. Barrier evolution and placer formation at Bujuru southern Brazil. Marine Geology, 203: 43-56.

Doornkamp, J. C. 1998. Coastal flooding, global warming and environmental management. Journal of Environmental Management, 52: 327-333.

Esteves, L. S.; Dillenburg, S. R. & Toldo Jr., E. E. 2004b. Alongshore patterns of shoreline movements in southern Brazil. Journal of Coastal Research, SI 39: 215-219.

Esteves, L. S. & Santos, I. R. 2001. Impacto econômico da erosão costeira na praia do Hermenegildo (RS), Brasil. Pesquisas, 28(2): 393-403.

Esteves, L. S.; Silva, A. R. P.; Arejano, T.B.; Pivel, M.A.G. & Vranjac, M.P. 2003a. Coastal development and human impacts along the Rio Grande do Sul beaches, Brazil. Journal of Coastal Research, SI 35: 548-556.

Esteves, L. S.; Toldo Jr., E. E. & Dillenburg, S. R. 2003b. Influência da mobilidade praial nas estimativas das taxas de variação da linha de costa. In: CONGRESSO DA ASSOCIAÇÃO BRASILEIRA DE ESTUDOS DO QUATERNÁRIO, IX, 2003, Recife. Resumos Expandidos...Recife, ABEQUA, CD-ROM, 151.pdf.

Esteves, L. S.; Williams, J. J. & Dillenburg, S. R. 2004a. Seasonal and interannual influences on the patterns of shoreline changes in Rio Grande do Sul, southern Brazil. Journal of Coastal Research, 22(5): 1076-1093. https://www.jstor.org/stable/4300375

FEPAM. 2000. Diretrizes Ambientais para o desenvolvimento dos municípios do litoral norte. Cadernos de Planejamento e Gestão Ambiental – No. 1, Governo do Estado Do Rio Grande do Sul, Secretaria do Meio Ambiente, FEPAM, 90p.

FEPAM. Qualidade ambiental. Bacias Hidrográficas das bacias litorâneas. Available at http://www.fepam.rs.gov.br/qualidade/litoranea.asp Accessed in: 22April2004.

Galgano, F.A. & Leatherman, S.P. 1991. Shoreline change analysis: a case study. Coastal Sediments ’91 (1): 1043-1053.

Honeycutt, M. G.; Crowell, M. & Douglas, B. C. 2001. Shoreline position forecasting: impact of storms, rate-calculation methodologies, and temporal scales. Journal of Coastal Research, 17(3): 721-730.

Martins, L. R. S.; Toldo Jr., E. E. & Dillenburg, S. R. (ed.). 2002. Erosão costeira: causas, análise de risco e sua relação com a gênese de depósitos minerais. UFRGS, Porto Alegre. CD-ROM.

MMA. Ecoturismo. Available at: http://www.mma.gov.br/port/sds/ecotur/corpo.html. Accessed in: 01May2004.

MMA. O Plano Nacional de Gerenciamento Costeiro. Available at: http://www.mma.gov.br/port/sqa/projeto/gerco/planocac.html . Accessed in: 01May2004.

Moraes, A. C. R. 1995. Os Impactos da Política Urbana Sobre a Zona Costeira. Ministério do Meio Ambiente, dos Recursos Hídricos e da Amazônia Legal, MMA, Brasília, DF, 33p.

NEMA. 2003. Dunas. http://www.octopus.furg.br/nema/dunas/dunas.htm. Accessed in: 22apr2004.

Nicholls, R. J. & Small, C. 2002. Improved estimates of coastal population and exposure to hazards released. EOS Transactions, 83 (2), 301-305.

Nicolodi, J. L.; Toldo Jr., E. E. & Gruber, N. L. S. 2000. Análise da direcionalidade das correntes litorâneas no litoral norte do Rio Grande do Sul. In: Semana Nacional de Oceanografia, XIII, 2000, Itajaí, SC. Anais... Itajaí, UNIVALI, p. 461-463.

NOAA. What is “Management”? Integrated Coastal Management An International Priority. Available at http://icm.noaa.gov/story/icm_mgt.html Accessed in: 01 may 2004.

Page, S. 1998. Transport for recreation and tourism. In: Hoyle, B. & Knowles, R. (ed.), Modern Transport Geography, 2nd ed. John Wiley & Sons, Chichester, UK, p. 217-240.

Pajak, M. J. & Leatherman, S. 2002. The high water line as shoreline indicator. Journal of Coastal Research, 18(2): 329-337.

Ramsar. 2002. A directory of wetlands of international importance. Available at: http://www.wetlands.org/RDB/Ramsar_Dir/Brazil/BR002D02.htm Accessed in: 22 apr 2004.

Seeliger, U.; Cordazzo, C. V.; Oliveira, C. P. L. & Seeliger, M. 2000. Long-term changes of coastal foredunes in the Southwest Atlantic. Journal of Coastal Research, 16(4): 1068-1072.

Silva, T. S. & Tagliani, P. R. A. 2000. Environmental impacts of Pine afforestation along Rio Grande do Sul coastal plain, Southern Brazil. In: SIMPÓSIO BRASILEIRO SOBRE PRAIAS ARENOSAS: MORFODINÂMICA, ECOLOGIA, USOS, RISCOS E GESTÃO, 2000, Itajaí, SC. Anais...Itajaí, UNIVALI, p. 321-322.

Small, C. & Nicholls, R. J. 2003. A global analysis of human settlement in coastal zones. Journal of Coastal Research, 19(3): 584-599.

Stockdon, H. J.; Sallenger, A. H. Jr.; List, J. H. & Holman, R. A. 2002. Estimation of shoreline position and change using airborne topographic lidar data. Journal of Coastal Research, 18(3): 502-513.

Tagliani, P.R.A. 1995. Estratégia de planificação ambiental para o sistema ecológico da restinga da Lagoa dos Patos-Planície Costeira do Rio Grande do Sul. São Carlos. 228p. Tese de Doutorado, Programa de Pós-graduação em Ecologia e Recursos Naturais, Universidade Federal de São Carlos.

Tomazelli, L. J.; Villwock, J. A.; Dillenburg, S. R.; Bachi, F. A. & Dehnhardt, B. A. 1998. Significance of present-day coastal erosion and marine transgression, Rio Grande do Sul, southern Brazil. Anais da Academia Brasileira de Ciências, 70(2): 221-229.

Turner, R. K.; Subak, S. & Adger, W. N. 1996. Pressures, trends and impacts in coastal zones: interactions between socioeconomic and natural systems. Journal of Environmental Management, 20(2): 159-173.

United Nations International Strategy for Disaster Reduction. 2003. Natural disasters and sustainable development: understanding the links between development, environment and natural disasters. 30p. Available at: http://www.unisdr.org/eng/risk-reduction/wssd/Dr-and-SD-English.pdf Accessed in: 01 May 2004.

Villwock, J. A.; Tomazelli, L. J.; Loss, E. L.; Dehnhardt, E. A.; Horn Fo., N.O., Bachi, F.A. & Dehnhardt, B.A. 1986. Geology of the Rio Grande do Sul coastal province. In: Rabassa, J. (ed.). Quaternary of South America and Antarctic Peninsula 4, pp. 79–97. https://doi.org/10.1201/9781003079316-5

Publicado

2004-12-31

Como Citar

ESTEVES, L. S. (2004). Shoreline Changes and Coastal Evolution as Parameters to Identify Priority Areas for Management in Rio Grande do Sul, Brazil. Pesquisas Em Geociências, 31(2), 15–30. https://doi.org/10.22456/1807-9806.19571