Made available in DSpace on 2015-02-24T19:48:40Z (GMT). No. of bitstreams: 1 1-44.pdf: 5231918 bytes, checksum: eda1e7c0b224ead6ae01660a9c2ee531 (MD5) Previous issue date: 2009-10-16 / The northern coast of Rio Grande do Norte State is characterized by strong changes in coastal morphology, caused by various geological and climatic factors. In this region are installed the main socio-economic activities of the State, highlighting the oil industry, which exerts much of its activities in the coastal area studied. Erosion is a constant problem in this region because it affects the entire local populace to the destruction of houses and trade, rendering tourism, affecting the livelihood activities and industrial activities. The greatest risk is related to environmental damage that can be caused by the oil spill in this region. To understand what determines the changes in coastal morphology this Doctoral Thesis is proposed to identify the factors at local, regional and even global corroborate coastal dynamics to this coast in question. For this study, used several different products and tools for interpreting the conditions of the erosive effect that dominates the whole northern coast of the State, in an attempt to quantify and describe the causes and effects that affect the entire coastal zone monitored. The development of activities is built into the projects Rede 05 PETROMAR (CTPETRO-FINEP/PETROBRAS/CNPq), PETRORISCO, HIDROSEMA, PETROMAR e Rede 05/04 POTMAR (FNDCT/CTPETROFINEP/ CNPq), in the activities of multidisciplinary and inter-features in issues involving environmental monitoring and oil activity / O litoral setentrional do Estado do Rio Grande do Norte ? caracterizado por fortes mudan?as na sua morfologia costeira, ocasionadas por diversos fatores geol?gicos e clim?ticos. Nesta regi?o est?o instaladas as principais atividades socioecon?micas do Estado, destacando a Ind?stria Petrol?fera, que exerce boa parte de suas atividades na zona costeira estudada. A eros?o ? o constante problema nesta regi?o, pois afeta toda popula??o local com a destrui??o de moradias e com?rcio, inviabilizando o turismo, comprometendo as atividades de subsist?ncia e as atividades industriais. O risco maior est? relacionado ao dano ambiental que pode ser causado pelo derramamento de ?leo nesta regi?o. Para entender o que condiciona estas modifica??es na morfologia costeira esta Tese de Doutorado se prop?s em identificar os fatores de escala local, regional e at? global que corroboram com a din?mica costeira para este litoral em quest?o. Para tal estudo foram utilizados diversos produtos e diversas ferramentas para interpreta??o das condicionantes do efeito erosivo que predomina como um todo o litoral setentrional do Estado, na tentativa de quantificar e qualificar as causas e efeitos que afetam toda zona costeira monitorada. O desenvolvimento das atividades est? inserido em projetos Rede 05 PETROMAR (CTPETROFINEP/PETROBRAS/CNPq), PETRORISCO, HIDROSEMA, PETROMAR e Rede 05/04 POTMAR (FNDCT/CTPETRO-FINEP/CNPq), no ?mbito das atividades de caracter?sticas multidisciplinares e interinstitucional em temas que envolvem o monitoramento ambiental e a atividade petrol?fera

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-11-12T14:50:39Z No. of bitstreams: 1 CarlosDeSouzaJunior_DISSERT.pdf: 9843701 bytes, checksum: 8e563077102155eb9d912b0e87894399 (MD5) / Approved for entry into archive by Elisangela Moura (lilaalves@gmail.com) on 2015-11-16T13:32:44Z (GMT) No. of bitstreams: 1 CarlosDeSouzaJunior_DISSERT.pdf: 9843701 bytes, checksum: 8e563077102155eb9d912b0e87894399 (MD5) / Made available in DSpace on 2015-11-16T13:32:44Z (GMT). No. of bitstreams: 1 CarlosDeSouzaJunior_DISSERT.pdf: 9843701 bytes, checksum: 8e563077102155eb9d912b0e87894399 (MD5) Previous issue date: 2013-12-20 / As mudan?as naturais e antr?picas que v?m ocorrendo na zona costeira em todo o mundo representam um dos maiores problemas para a sociedade neste s?culo. Essa import?ncia se torna mais evidente devido ? elevada densidade das cidades litor?neas, ? crescente especula??o tur?stico-imobili?ria dessas ?reas e ?s altera??es clim?ticas que tendem a desencadear e acelerar esses processos. Nesse contexto, percebe-se cada vez mais um aumento significativo dos problemas relacionados ? eros?o costeira e recuo de fal?sias no estado do Rio Grande do Norte. A ?rea de estudo desta pesquisa localiza-se na zona costeira do munic?pio de Ba?a Formosa/RN, no litoral oriental-sul do Rio Grande do Norte, e possui uma extens?o de cerca de 1200 m ao longo da praia do Porto. O objetivo principal deste trabalho ? analisar a estabilidade dessas fal?sias, atrav?s de investiga??es de campo, ensaios e an?lises computacionais utilizando o M?todo dos Elementos Finitos e o M?todo de Bishop. Para atender aos objetivos deste trabalho, a ?rea foi subdividida em quatro trechos, e foram aplicados checklists e tamb?m realizados ensaios de caracteriza??o e de cisalhamento direto com materiais obtidos ao longo desses trechos. Os segmentos de fal?sia nessa zona costeira possuem alturas variando em torno de 4 m e 14 m e inclina??es de aproximadamente 40? a 90?. Os solos constituintes das fal?sias foram classificados, em termos gerais, como areias argilosas ou siltosas e argilas arenosas, sendo os solos mais argilosos e variegados pertencentes ? base da fal?sia. As an?lises de estabilidade mostraram que os fatores de seguran?a variaram, no trecho 01, de 2,38 a 6,06, no trecho 02, de 1,01 a 1,62, no trecho 03, de 1,29 a 1,78, e no trecho 04, de 0,83 a 2,48. Assim, os trechos 02 e 03, foram considerados como mais inst?veis. Entretanto, pode-se considerar o trecho 03 como o mais cr?tico devido ? aus?ncia de estruturas de prote??o costeira e ? estreita faixa de praia. Fato que n?o ocorre no trecho 02, o qual possui uma extensa faixa de praia e ? protegido por um muro de arrimo que restringe o acesso dos banhistas ?s ?reas adjacentes do p? da fal?sia. / The natural and anthropogenic changes that are occurring at the coastal zone around the world represent the greatest problem to society in this century. This problem becomes more evident due to high density of coastal cities, to growing tourist-estate speculation of those areas and to climate change that tend to trigger and accelerate the erosive processes that operating in the littoral. In this context, it?s possible perceive ever more a significant increase of problems associated to the coastal erosion and retreat of cliffs in the state of Rio Grande do Norte, where this study area of this search is located. The area is located in the coastal zone of the city of Ba?a Formosa/RN, in south-eastern coast of Rio Grande do Norte, and has a extension of about 1200 meters along the Porto beach. The main objective of this study is to analyze the stability of these cliffs in this region. Through field investigations, testings and computational analysis using the Finite Element Method and Equilibrium Limit Methods. The area was divided into four sections, and were applied checklists, and also realized characterization tests and direct shear tests with materials obtained along these sections. In this manner, it was found that the segments of cliff in this coastal zone have heights around 4 meters to 14 meters and inclinations of approximately 40? to 90?.However the constituents soils of the cliffs were classified, in general terms in accordance to Unified Soil Classification System (USCS), as clayey sands or silty sands, clays of low plasticity, clayey gravels and poorly graduaded sands. The most variegated and clayey soils belong to base of the cliff. The stability analysis showed that the safety factors ranged in section 01, from 1.92 to 4.93, in the section 02, from 1.00 to 1.43, in the section 03, from 1.36 to 1.75 , and section 04, from 1.00 to 3.64. Thus, the sections 02 and 03 were considered more unstable. However, the section 03 can be considered as the most critical section due to the absence of coastal protection structures and the narrow strip of beach.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-07-03T13:49:24Z No. of bitstreams: 1 CeciliaAlvesDeOliveira_DISSERT.pdf: 6009195 bytes, checksum: 8fb3b568732f80c4209f23b7f0b0b4ec (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-07-07T14:50:39Z (GMT) No. of bitstreams: 1 CeciliaAlvesDeOliveira_DISSERT.pdf: 6009195 bytes, checksum: 8fb3b568732f80c4209f23b7f0b0b4ec (MD5) / Made available in DSpace on 2017-07-07T14:50:39Z (GMT). No. of bitstreams: 1 CeciliaAlvesDeOliveira_DISSERT.pdf: 6009195 bytes, checksum: 8fb3b568732f80c4209f23b7f0b0b4ec (MD5) Previous issue date: 2017-03-23 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A morfologia das regi?es costeiras est? em constante mudan?a, devido a intera??o de processos naturais e antr?picos. Por vezes, as a??es destes processos na linha de costa podem causar problemas de eros?o, provocando impactos ambientais e preju?zos socioecon?micos. Para que se possa agir de maneira preventiva ? necess?rio um conhecimento aprofundado dos fatores naturais e antr?picos que agem na din?mica costeira. O objetivo deste estudo ? o mapeamento geol?gico do substrato plataformal adjacente a praias de Ponta Negra em Natal-RN, em uma ?rea sob intensa eros?o costeira. A metodologia utilizada consistiu na coleta de amostras superficiais de sedimento da plataforma continental, analisadas quanto a granulometria, composi??o, presen?a de mat?ria org?nica e teor de carbonato de c?lcio. Posteriormente integrados a dados geof?sicos, (batimetria mono e multifeixe e sonografia), hidrodin?micos (ondas, correntes e mar?s) pr?-existentes. Os resultados obtidos at? o presente momento indicam que a granulometria dos sedimentos que comp?em o substrato da plataforma em estudo aumenta com a profundidade, apresentam predom?nio da fra??o areia grossa (43%) seguida por areia m?dia (34%). A presen?a de carbonato de c?lcio ? marcante ao longo de toda a ?rea, e tamb?m aumenta com a profundidade. Os sedimentos silicicl?sticos s?o encontrados pr?ximo a linha de costa, enquanto que os sedimentos biocl?sticos ocorrem predominantemente ap?s a is?bata de 10 m. A plataforma apresenta caracter?sticas de uma plataforma ?faminta?, podendo ser observada pela exposi??o de afloramentos da Forma??o Barreiras na plataforma e na base do Morro do Careca. Essas informa??es devem ser levadas em considera??o para a elabora??o das medidas de recupera??o da ?rea, que vem enfrentando graves problemas com a eros?o. / The morphology of coastal areas is constantly changing due to interaction of natural and anthropogenic processes. Sometimes the actions of these processes on the coastline can cause erosional problems, causing environmental impacts and socio-economic losses. In order to act preventively requires a thorough understanding of natural and anthropogenic factors that act in coastal dynamics. The aim of this study is the geological mapping of marine substrate adjacent the beaches of Ponta Negra, Natal, Brazil, in an area under intense coastal erosion. The methodology consisted of the collection of surface sediment samples of the continental shelf, analyzed for particle size, composition, presence of organic matter and carbonate. Later integrated with pre-existing data such as geophysical (single and multbeam bathymetry, sonography) and hydrodynamic (waves, currents, tides) data. The results indicate that the grain size of the sediments that make up the substrate presented mainly coarse sand (43%), followed by medium sand (34%). The presence of carbonate is marked throughout the area, and increases with depth. The siliciclastic sediments founds near the shoreline, while bioclastic sediments occur predominantly after the isobath of 10m. Barreiras Formation outcrops on the shelf attests the sediment starvation, which used to amplify by human action. This information should be taken into account in the preparation of the recovery measures the area, which is facing serious problems with erosion.

Made available in DSpace on 2015-03-13T17:08:32Z (GMT). No. of bitstreams: 1 WernerFT.pdf: 4981794 bytes, checksum: 659d4c7e2270b32fa3929a5b6a5ab459 (MD5) Previous issue date: 2002-02-26 / This dissertation the results of a research developed in the area of S?o Bento do Norte and Cai?ara do Norte, northern coast of the State of Rio Grande do Norte, during the period of June of 2000 to August of 2001, in the ambit of the projects MAMBMAR? (CNPq/CTPETRO) and PROBRAL (CAPES/DAAD).The objective principal of this research was the characterization of the sedimentary dynamics of this coast, with base in data of coastal process (winds, currents, waves and tides), with topographical risings (beach profiles and dunes), satellite images and sedimentary analyses. The more specific objectives were accomplished the coastal monitoring of this coast, to verify the maintenance of an erosive tendency or progradacional after the groynes construction for contention of the erosion in the beach of Cai?ara do Norte, as well as to verify the influence of the features of bottom of the platform interns adjacent on the pole petroliferous of Guamar?. The executed monitoramento allowed to identify that the movement of the sediments, along the year, in that area, is cyclical, reaching the largest oscillations during the months of winter (deposition) and they will summer (erosion). The sedimentologic studies indicated a general tendency for sands quartzosas, with gravel presence, moderately to good selected, with asymmetry predominantly negative. In agreement with the parameter of Dean (1957), used in the identification of the state morfodin?mico of the beaches, monitored beaches, are basically reflectivas with tendency to middlemen, what frames that space of the coast norteriograndense, as a space strongly vulnerable to erosive processes. The studies developed in the platform, it interns of this area, allowed to visualize for the first time, in large scale, the distribution of the features of the submarine bottom to the batom?trico coat of 25 meters. Being pointed out the presence of a high one topographical submerged, with about 5 meters of height, 1 km of width and more than 24 meters of extension, located in the platform it interns in front of S?o Bento do Norte; coincident with the trend of the system of flaws of Carnaubais. This feature relay an important paper on the control of the sedimentary processes and oceanographic, as well as in the coastal evolution of this area of the RN state, and they affect the area of the pole petroliferous of Guamar? directly. These results contribute to a better knowledge of the processes in the area, and consequently as subsidies implantation of measures of coastal and environmental protection for the cities of S?o Bento do Norte and Cai?ara do Norte, as well as to understand how the geological-sedimentary processes and oceanographic, in this area, are influencing the characteristics geoambientais of the pole petroliferous of Guamar? / Esta disserta??o apresenta os resultados de uma pesquisa desenvolvida na regi?o de S?o Bento do Norte e Cai?ara do Norte, litoral setentrional do Estado do Rio Grande do Norte, durante o per?odo de Junho de 2000 a Agosto de 2001, no ?mbito dos projetos MAMBMAR? (CNPq/CTPETRO) e PROBRAL (CAPES/DAAD). O objetivo principal da pesquisa foi a caracteriza??o da din?mica sedimentar do litoral em quest?o, com base em dados relativos ? din?mica costeira (ventos, correntes, ondas e mar?s), levantamentos topogr?ficos (perfis de praia e dunas), imagens de sat?lite e an?lises sedimentol?gicas. Como objetivos espec?ficos foram realizados o monitoramento deste litoral, com o fim de verificar a manuten??o de uma tend?ncia erosiva ou progradacional ap?s a constru??o de gabi?es para conten??o da eros?o na praia de Cai?ara do Norte, bem como verificar a influ?ncia das fei??es de fundo da plataforma interna adjacente sobre o p?lo petrol?fero de Guamar?. O monitoramento executado permitiu identificar que a movimenta??o dos sedimentos, ao longo do ano, nessa regi?o, exibe um padr?o c?clico, atingindo as maiores oscila??es durante os meses de inverno (deposi??o) e ver?o (eros?o). Os estudos sedimentol?gicos indicaram uma tend?ncia geral para areias quartzosas, com presen?a de cascalho, moderadamente a bem selecionadas, com assimetria predominantemente negativa. De acordo com o par?metro de Dean (1957), as praias monitoradas s?o basicamente reflectivas com tend?ncia a intermedi?rias, o que enquadra esse trecho da costa norteriograndense como fortemente vulner?vel a processos erosivos. Os estudos desenvolvidos na plataforma interna desta regi?o permitiram visualizar pela primeira vez, em macroescala, a distribui??o das fei??es do fundo submarino at? a is?bata de 25 metros. Ressaltando-se a presen?a de um alto topogr?fico submerso, com cerca de 5 metros de altura, 1 km de largura e mais de 24 metros de extens?o, localizado na plataforma interna em frente a cidade de S?o Bento do Norte, coincidente com o trend do Sistema de Falhas de Carnaubais. Esta fei??o exerce um papel importante no controle dos processos sedimentares e oceanogr?ficos, bem como na evolu??o costeira desta regi?o do Estado do RN, que afetam diretamente a regi?o do p?lo petrol?fero de Guamar?. Estes resultados contribuem para um melhor conhecimento dos processos atuantes na regi?o e, conseq?entemente, fornece subs?dios para a implementa??o de medidas de prote??o costeira e ambiental para as cidades de S?o Bento do Norte e Cai?ara do Norte, bem como para o melhor entendimento de modo como os processos geol?gicos e oceanogr?ficos atuantes nesta ?rea, v?m influenciando nas caracter?sticas geoambientais do p?lo petrol?fero de Guamar?

Made available in DSpace on 2015-03-13T17:08:28Z (GMT). No. of bitstreams: 1 1-100.pdf: 4856681 bytes, checksum: 9a9a288a1ab8a2fbbf25e68815d417ca (MD5) Previous issue date: 2009-10-19 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The study area consist in high sensitivity environments located on the northern coast of Rio Grande do Norte, Northeast Brazil. The barrier island are the main geomorphological features on the coastal landscape, being naturally instable and surrounded by industrial activities like oil fields, salt industry, shrimp farms and urban areas sometimes installed parallel to the coast, combined with coast engineering interventions. High energy hydrodynamic process are responsible for the morphological instability of the coast. The study was based on remote sensing data obtained between 1954 and 2007 which consist in orbital images from Landsat, CBERS and Ikonos satellites and aerial photos. With all data integrated on GIS environment it was possible to update thematic maps of geology, geomorphology, vegetation, soil and landuse and development of multitemporal maps pointing areas with erosion and depositions of sediments, defining the critical erosion process on this region. The bigger morphological changes are related to changes on wind patterns during the year, terrestrial and sea breezes during the day, with spits and barrier island migration, opening and closing of channels like the one parallel to the coast on the area of Serra and Macau oil fields. These factors combined with the significant reduction on sediment budgets due to the loss of natural spaces to sediment reworking contribute to the low resilience which tends to be growing on the area of Serra and Macau oil fields. In front of such scenery a detailed monitoring was done in order to find technological possibilities for coastal restoration. A pilot area was defined to start the project of mangrove restore together with beach nourishment in order to minimize the effect of the erosion caused by the channel parallel to the coast, contributing to stabilize the northeast channel as the main one. It s expected that such methodology will aid the coastal environments restoration and the balance between industrial activities and coastal erosion / A ?rea de estudo est? inserida no litoral setentrional do Rio Grande do Norte, situado no extremo NE do Brasil, apresenta ambientes de alta sensibilidade ambiental tendo como principal caracter?stica na geomorfologia do litoral as ilhas barreiras, ambientes fr?geis e ef?meros circundado por atividades antr?picas como os campos petrol?feros, a atividade salineira, de carcinicultura e ?reas urbanas. A regi?o ? caracterizada por processos hidrodin?micos de alta energia respons?veis pela intensa a??o da din?mica costeira. O estudo foi realizado tendo como base dados entre 1954 e 2007 obtidos com o uso de sensores orbitais ?pticos: Landsat, CBERS, Ikonos e fotografias a?reas, validadas por fotografias a?reas de pequeno formato adquiridas ao longo dos anos. Com todos os dados integrados em ambiente SIG, foi atualizado o mapa Geol?gico, Geomorfol?gico, Vegeta??o, Pedol?gico, de Uso e Ocupa??o do Solo do BDAG e confeccionado os mapas multitemporais, apontando como resultado o mapeamento das ?reas de acres??o e de eros?o de sedimentos, caracterizando o processo de eros?o como cr?tico na ?rea do estudo. As altera??es morfol?gicas de maior magnitude observadas est?o relacionadas ? modifica??o no padr?o anual de ventos, destacando-se as brisas marinhas e terrestres na circula??o di?ria, com migra??o dos spits e das ilhas barreiras dominadas por mar?, levando a abertura e fechamento de canais de mar?, em especial do canal paralelo ? linha de costa, pr?ximo aos campos petrol?feros, proporciona uma redu??o significativa de aporte de sedimento na zona costeira, devido ? indisponibilidade de espa?o natural para o retrabalhamento do sedimento. Estes fatores combinados contribuem para a baixa resili?ncia1 que tende a ser crescente na ?rea dos Campos de Serra e Macau. Dentro deste cen?rio, foi realizado um levantamento minucioso buscando alternativas tecnol?gicas de restaura??o costeira. Enfim, por se tratar de ambientes predominantemente de ilhas barreiras, foi mapeada uma ?rea piloto, onde ? sugerida a instala??o do projeto de restaura??o dos ecossistemas de manguezais, combinada com restaura??o ecol?gica de engordamento de praia, buscando minimizar o efeito do Canal paralelo ? linha de costa, corroborando para a estabiliza??o do canal noroeste como o canal preferencial. Espera-se com esta estrat?gia metodol?gica contribuir para a restaura??o de ambientes costeiros e o conv?vio da atividade com a problem?tica da eros?o costeira

Made available in DSpace on 2015-03-13T17:08:12Z (GMT). No. of bitstreams: 1 GuilhermeCSP.pdf: 3646062 bytes, checksum: b5b07bc8d98389d97c55817c87e38a55 (MD5) Previous issue date: 2008-01-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The research area is located on the county of Tibau do Sul, in the east coast of Rio Grande do Norte State, about 80km south of the capital Natal. The tourism represents the main income activity and Pipa beach is the most visited beach in the city, annually receives a large influx of domestic and foreign tourists. Some recent studies have reported the occurrence of coastal erosion in this littoral, being the main objective of the research, analyze the existing coastal erosion, through two methodologies, the geoenvironmental mapping and beach morphodynamics. The geoenvironmental mapping was done from oblique aerial photographs and field visits, which sought to carry out first the geomorphological mapping, with the purpose of analyzing features that suggest susceptible areas to erosion, as areas without protection of natural dunes, marine terraces, or sandstones (beach-rocks and ferruginous sandstones), areas with the presence of gullies and stretches where the sea-cliffs were in direct contact with the action of the sea, representing the beginning of the beach profile. In the morphodynamic study sought to carry out the survey of the physical and morphological characteristics, the analysis of sediment grain of the beaches and finally the analysis of the morphodynamic parameters to generate a table of risk to erosion by sector of the beach. The morphodynamic parameters were defined by the methodology proposed by Short (2006), in which considers different patterns of dynamism on beaches with characteristics favorable and unfavorable to erosive profiles. The maps indicated different levels of risk to the segments of the beaches analyzed, suggesting risk to erosion low and low to moderate only in areas north and northwest of the beaches of Madeiro and Curral, and levels of moderate and high risk sectors in the south and southeast of these beaches . The beach of Pipa showed moderate levels of risk and moderate to high at the ends and high risk to erosion in the central portion. The study of the coastal environment, its morphological evolution, and areas with problems of erosion, are of fundamental importance to assist coastal management policies, giving grants for planning activities undertaken in these regions / A ?rea da pesquisa localiza-se no munic?pio de Tibau do Sul, situado na costa leste do Estado do Rio Grande do Norte, cerca de 80 km a sul da capital Natal. O turismo representa a principal atividade geradora de renda e a praia de Pipa, a mais conhecida do munic?pio, recebe anualmente um grande fluxo de turistas nacionais e estrangeiros. Alguns estudos recentes relatam a ocorr?ncia de eros?o costeira em pontos desta regi?o litor?nea, sendo o objetivo principal da pesquisa, analisar a eros?o costeira existente, atrav?s de duas metodologias, o mapeamento geoambiental e a morfodin?mica praial. O mapeamento geoambiental foi realizado a partir de fotografias a?reas obl?quas e visitas a campo, onde buscou-se realizar primeiramente o mapeamento geomorfol?gico, com o objetivo de analisar fei??es que sugerem ?reas suscept?veis ? eros?o, como zonas sem prote??o natural de dunas, terra?os marinhos, ou arenitos (de praia e ferruginosos), ?reas com presen?a de ravinamentos e trechos onde as fal?sias encontravam-se vivas, ou seja, representando o in?cio do perfil praial, em contato direto com a a??o do mar. No estudo morfodin?mico buscou-se realizar o levantamento das caracter?sticas f?sicas e morfol?gicas, a an?lise granulom?trica dos sedimentos das praias e por fim a an?lise dos par?metros morfodin?micos para gerar uma tabela de risco ? eros?o por setor praial. Os par?metros morfodin?micos foram definidos atrav?s da metodologia proposta por Short (2006), em que considera diferentes padr?es de dinamismo em praias com caracter?sticas favor?veis e desfavor?veis a perfis erosivos. Os mapas indicaram diferentes n?veis de risco para os segmentos das praias analisadas, sugerindo risco ? eros?o baixo e baixo a moderado apenas nos setores norte e noroeste das praias do Madeiro e Curral, e n?veis de risco moderado a alto nos setores sul e sudeste destas praias. A praia de Pipa apresentou n?veis de risco moderado e moderado a alto nas extremidades e alto risco ? eros?o na por??o central. O estudo do ambiente costeiro, de sua evolu??o morfol?gica, e de ?reas com problemas de eros?o ? de fundamental import?ncia para auxiliar pol?ticas de gerenciamento costeiro, dando subs?dios para o planejamento das atividades desenvolvidas nestas regi?es

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T22:45:04Z No. of bitstreams: 1 RafaelVictorDeMeloSilva_DISSERT.pdf: 11731929 bytes, checksum: 434869a7e58a0837ddd3098a90a82d0f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-09T19:52:30Z (GMT) No. of bitstreams: 1 RafaelVictorDeMeloSilva_DISSERT.pdf: 11731929 bytes, checksum: 434869a7e58a0837ddd3098a90a82d0f (MD5) / Made available in DSpace on 2017-06-09T19:52:30Z (GMT). No. of bitstreams: 1 RafaelVictorDeMeloSilva_DISSERT.pdf: 11731929 bytes, checksum: 434869a7e58a0837ddd3098a90a82d0f (MD5) Previous issue date: 2017-02-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O homem sempre buscou instalar sua infraestrutura de ocupa??o, defesa e sobreviv?ncia pr?xima das Zonas Costeiras. A Praia de Ponta Negra, localizada ao Sul da cidade de Natal/RN, ilustra bem o processo praticado pelo homem de ocupa??o das terras por meio da explora??o de recursos naturais, muitas vezes causando altera??es na paisagem mediante o desmatamento, a pr?tica de cortes e aterros para urbaniza??o, especula??o do pre?o da terra e da instala??o de numerosas atividades econ?micas ao longo da praia. A din?mica da ocupa??o de Ponta Negra causou condi??es favor?veis ao crescente processo erosivo que gerou danos f?sicos ao cal?ad?o desta praia. Esta pesquisa tem como objetivo construir uma an?lise integrada da zona costeira da praia de Ponta Negra em Natal/RN. Nesse sentido, o presente estudo ? composto por dois artigos distintos, em que o primeiro se dedica a identificar as modifica??es morfol?gicas da praia de Ponta Negra, no per?odo de 1969 a 2016. Os valores de volume sedimentar do perfil morfol?gico utilizados foram coletados in loco no per?odo de 12 meses (2012/2013). Na identifica??o das fei??es pret?ritas foram consideradas fotografias a?reas obtidas pelo Servi?o A?reo Cruzeiro do Sul, em 1969 e imagens recentes do Google Earth Pro. No processamento das imagens empregou-se t?cnicas de processamento digital de imagens e Sistemas de Informa??es Geogr?fica (SIG). O segundo artigo busca tra?ar um perfil sobre a ocupa??o humana e eventos costeiros na praia de Ponta Negra, tomando como base as not?cias veiculadas no acervo jornal?stico da Tribuna do Norte, no per?odo de 1950 a 2016. Considera-se que o acervo de um jornal pode ser uma fonte informacional que retrata, ainda que parcialmente, um panorama dos importantes eventos ocorridos ao longo do tempo. Isto numa regi?o de uma cidade onde informa??es s?o, muitas vezes, inexistentes. Na constru??o do perfil utilizou-se a t?cnica da an?lise de conte?do, classificando em cinco grandes categorias a an?lise costeira integrada: ocupa??o humana, eventos meteorol?gicos, usos, pol?ticas p?blicas e press?es socioecon?micas. Tamb?m realizou-se a an?lise de correspond?ncia com intuito de associar os anos considerados no estudo das categorias de classifica??o. Adicionalmente, as not?cias classificadas como ?eventos meteorol?gicos? noticiados pelo Jornal foram relacionados qualitativamente ao acumulado de precipita??o conforme os registros da Esta??o Meteorol?gica do Instituto Nacional de Meteorologia, localizada na Universidade Federal do Rio Grande do Norte. O resultado do monitoramento da eros?o no perfil praial e a precipita??o mensal acumulada traz uma correla??o negativa. Quanto aos principais resultados do primeiro artigo, ressalta-se que o processo de avalia??o das fei??es costeiras resultou que em 1969 a mancha urbana representava 16,4% da ?rea de e mais de 60% em 2016. Esse dado corrobora com a hip?tese de que a destrui??o das fei??es de prote??o do ambiente potencializou o processo erosivo. As demais classes apresentaram diminui??o de ?rea, ao contr?rio da mancha urbana. Na classe vegeta??o ocorre diminui??o de 37,2% para 13,6% de cobertura vegetal e esse quadro seria respons?vel pela n?o fixa??o de sedimentos inconsolidados. Os resultados do segundo artigo demonstraram que durante todo o per?odo analisado, houve um aumento no n?mero de not?cias veiculados pelo Jornal. Esse acr?scimo de not?cias sobre a Praia de Ponta Negra ?, inicialmente, notado a partir dos anos 70, momento a partir do qual a praia em tela passa a despontar no notici?rio da m?dia impressa. Percebe-se tamb?m diferen?as nos temas das publica??es ao se compara o primeiro momento do estudo (Anos 50 e 60) e o final do estudo (Anos 2000). no primeiro momento o foco da m?dia era primordialmente quanto ao ?uso e forma de ocupa??o?. Nos anos mais recentes (Anos 2000) o foco passou a evidenciar os ?eventos meteorol?gicos?. Essa mudan?a de foco deve, possivelmente, ter rela??o com o crescimento das discuss?es em torno da mudan?as clim?ticas no mundo, que, com o passar dos anos, tem influenciado fortemente o conte?do jornal?stico. Finalmente, ainda verificou-se eventos erosivos que vieram a destruir partes extensas do cal?ad?o da praia de Ponta Negra. / Man has always sought to install his infrastructure of occupation, defense and survival near the Coastal Zones. Ponta Negra Beach, located in the south of the city of Natal, Rio Grande do Norte, illustrates well the process practiced by the man of land occupation, through the exploitation of natural resources, often causing changes in the landscape with deforestation, the practice of cuts and landfills for urbanization, speculation of the price of land and the installation of numerous economic activities along the beach. The dynamics of the occupation of Ponta Negra caused favorable conditions to the growing erosive process that generated physical damages to the boardwalk of this beach. This research aims to build an integrated analysis of the coastal zone of the beach of Ponta Negra, Natal. In this sense, the present study is composed of two distinct articles, in which the first one is dedicated to identify the morphological changes of the beach of Ponta Negra from 1969 to 2016. The values of sedimentary volume of the morphological profile used were collected locally in the period of 12 months (2012/2013). In the identification of the previous features were considered aerial photographs by the Cruzeiro do Sul Air Service in 1969. In addition, the most recent features were exported from the software Google Earth PRO. We used the technique of remote sensing, digital image processing in Geographic Information System (GIS). The second article seeks to draw a profile on human occupation and coastal events on the beach of Ponta Negra, based on the reports published in the journalistic collection of the Tribuna do Norte from 1950 to 2016. It is considered that the collection from the journal can be an informational source that portray, albeit partially, an overview of the important events that have occurred over time in a region of a city where information is often non-existent. Furthermore, to construct this profile, the content analysis technique was used to classify five categories of integrated coastal analysis: human occupation, meteorological events, uses, public policies and socioeconomic pressures. The correspondence analysis was also performed in order to associate the categories considered in the study. Additionally, the news classified as "meteorological events" reported by the Journal were qualitatively related to the rainfall accumulation observed according to the Meteorological Station records of the National Meteorological Institute located at the Federal University of Rio Grande do Norte. The result of erosion monitoring in the beach profile and the accumulated monthly rainfall has a negative correlation. As for the main results of the first article, it is pointed out that the process of evaluation of the coastal features showedthat in 1969 the urban spot represented 16.4% of the total space cut and in 2016 more than 60%. This asserts the hypothesis that the destruction of environmental protection features has potentiated the erosive process. The other classes showed a decrease of area as opposed to the urban spot. In the vegetation class, there is a decrease from 37.2% to 13.6% and this composition is responsible for the fixation of the unconsolidated sediments. The results of the second article showed that throughout the analyzed period, there was an increase in the number of news stories published by the Journal. This increase in news about Ponta Negra Beach is initially noticed from the 70s, when the beach is always included in the media considered in the study. Differences in the subject of publications are also seen when comparing the first moment of the study (Years 50 and 60) and the end of the study (Years 2000). The initial focus of the media was primarily on "use and form of occupation". In contrast, the focus of the news in the most recent years (Years 2000) have come to highlight the so-called "meteorological events". This change in the focus of the news is possibly related to the increasing importance of discussion on climate change in the world and that over the years has strongly influenced journalistic content.Finally, in addition, there have been erosive events that have destroyed vast parts of the boardwalk from the beach of Ponta Negra.

Made available in DSpace on 2015-03-13T17:10:44Z (GMT). No. of bitstreams: 1 LidianeSN_DISSERT.pdf: 4629879 bytes, checksum: d28e312771a5a0b81c006b055f5b7eb1 (MD5) Previous issue date: 2011-02-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The coastal zone has been studied worldwide with a focus on the coastal erosion. In the present days, much of the world's coastlines are being affected by erosion, which causes great damage to the economy. This work had as study case the beaches of Areia Preta, Artistas, Meio and Forte located in Natal in Rio Grande do Norte. It shows as result the monitoring of the beach strip that makes possible to obtain quantitative and qualitative data, allows the study of the coastal dynamics of the beaches and the Recovery Project of the Areia Preta beach interference on adjacent beaches. This research was guided by the integrated analysis method on the systemic perspective. The pratical procedures adopted were: bibliographic research; fieldwork during eleven months (environmental characterization, collection of hydrodynamic data, topographic leveling, collection of sediments) and; sedimentological analysis of samples collected. By monitoring of the points A, B, C, D and E we were able to find the occurrence of the coastal erosion on their biggest part except by the C and D profiles. It was noted the need for the government to complete the hydraulic fill, as it made only 60% of the landfill planed. It was found that the spikes built on the beach of Areia Preta are preventing the natural transport of sediments that the longshore performs towards South-North. This interference is causing the lack of sediment on the beaches of Forte and Meio and their coastal erosion in consequence / A zona costeira tem sido estudada em escala mundial com o enfoque na eros?o costeira. Atualmente, grande parte das linhas de costa mundial est? sendo afetada pela eros?o, o que gera grande preju?zo para a economia. O trabalho teve como ?rea de estudo as praias de Areia Preta, dos Artistas, do Meio e do Forte, localizadas em Natal/RN. Apresenta como resultado o monitoramento da faixa de praia, que possibilita a obten??o de dados quantitativos e qualitativos, permite o estudo da din?mica costeira das praias e da interfer?ncia do projeto de recupera??o da praia de Areia Preta nas praias adjacentes. Esta pesquisa foi norteada pelo m?todo da an?lise integrada, na perspectiva sist?mica. Os procedimentos pr?ticos adotados foram: pesquisa bibliogr?fica; trabalho de campo durante onze meses (caracteriza??o ambiental, coleta de dados hidrodin?micos, nivelamento topogr?fico e coleta de sedimentos) e; an?lise sedimentol?gica das amostras coletadas. Atrav?s do monitoramento dos pontos A, B, C, D e E, foi poss?vel constatar a ocorr?ncia de eros?o costeira em todos os perfis. Notou-se a necessidade do poder p?blico completar o aterro hidr?ulico, j? que este efetuou apenas 60% do aterro previsto. Constatou-se que os espig?es constru?dos na praia de Areia Preta est?o impedindo o transporte natural de sedimentos, que a deriva litor?nea realiza no sentido Sul-Norte. Essa interfer?ncia est? acarretando na falta de sedimentos nas praias do Meio e do Forte e, conseq?entemente, na eros?o costeira das referidas praias