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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Modelagem do transporte de sedimentos na Zona Costeira da Barreira do Inferno - RN, atrav?s do SMC-Brasil

Gurgel, Daniel de Freitas 25 August 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-12-01T23:39:14Z No. of bitstreams: 1 DanielDeFreitasGurgel_DISSERT.pdf: 5519178 bytes, checksum: 841ebb2e47903fddbc7df135fe8f8c51 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-12-05T23:39:54Z (GMT) No. of bitstreams: 1 DanielDeFreitasGurgel_DISSERT.pdf: 5519178 bytes, checksum: 841ebb2e47903fddbc7df135fe8f8c51 (MD5) / Made available in DSpace on 2017-12-05T23:39:54Z (GMT). No. of bitstreams: 1 DanielDeFreitasGurgel_DISSERT.pdf: 5519178 bytes, checksum: 841ebb2e47903fddbc7df135fe8f8c51 (MD5) Previous issue date: 2017-08-25 / O estado do Rio Grande Norte vem apresentando eventos de eros?o costeira ao longo de sua costa, em diversos graus de intensidade. Os trechos afetados pela eros?o costeira tem esse fen?meno atribu?do principalmente ao reduzido aporte fluvial de sedimentos, decorrentes das pequenas dimens?es das bacias fluviais regionais e da perda de sedimentos para o continente com a forma??o dos campos dunares. O conhecimento do clima de ondas, bem como a taxa de transporte de sedimentos presentes na ?rea, ? fator preponderante nos estudos de eros?o costeira. Este trabalho teve como ?rea de estudo a praia da Barreira do Inferno. Os objetivos consistiram, com o uso da ferramenta de modelagem costeira SMC-Brasil, (i) conhecer o clima de ondas ao largo da praia da Barreira do Inferno por meio da an?lise dos dados fornecidos pelos pontos de propaga??o contidos na base de dados do SMC; (ii) realizar an?lise da din?mica sedimentar da praia por meio da modelagem de transporte longitudinal de sedimentos; (iii) Identificar a sensibilidade do SMC-Brasil diante da inser??o de carta n?utica interpolada pelos m?todos Vizinho Natural e Krigagem. Dentre os resultados, destaca-se que o clima de onda do entorno da praia da Barreira do Inferno mostrou uma maior tend?ncia de ondas vindas das dire??es E e ESE. O transporte longitudinal de sedimentos anual ? da ordem de, aproximadamente, 50.000m?/ano no sentido Sul-Norte. As diferen?as apresentadas pelos m?todos Vizinho Natural e Krigagem, no c?lculo do transporte de sedimento, se mostraram negligenci?veis. Portanto, o modelo utilizado mostrou baixa sensibilidade aos m?todos interpoladores no c?lculo do transporte de sedimento. / The state of Rio Grande do Norte/Brazil has been presenting coastal erosion events along its coast, in varying degrees of intensity. The stretches affected by coastal erosion are attributed mainly to the reduced fluvial contribution of sediments, due to the small size of the regional fluvial basins and the loss of sediments to the continent with the formation of dune fields. The knowledge of the wave climate, as well as sediment transport rate of an area, is a preponderant factor in studies of coastal erosion. This work had as study area the Barreira do Inferno beach. The objectives were to use the coastal modeling tool SMC-Brasil (i) to know the wave climate off the Barreira do Inferno beach by analyzing the data provided by the propagation points contained in the SMC-Brasil 60 years database; (ii) to perform analysis of the sedimentary dynamics of the beach through the longitudinal sediment transport model; (iii) to identify the sensitivity of the SMC-Brasil to the insertion of a nautical chart interpolated by the Natural Neighbor and Kriging methods. Among the results, it should be noted that the wave climate around the Barreira do Inferno beach showed a greater tendency of waves coming from the E and ESE directions. The annual longitudinal sediment transport is approximately 50,000 m?/year in the South-North direction. The differences presented by the Natural Neighbor and Kriging methods, in the sediment transport calculation, were negligible. Therefore, the model showed low sensitivity to the interpolation methods used in the sediment transport calculation.

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