Made available in DSpace on 2014-06-11T19:30:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-07-29Bitstream added on 2014-06-13T19:40:36Z : No. of bitstreams: 1 sabonaro_dz_dr_rcla.pdf: 1099292 bytes, checksum: 912e21046f44683d0973a340339045ed (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho abrangeu o Litoral do Estado de São Paulo, desde Ubatuba - litoral norte (Parque Estadual da Serra do Mar - Núcleo de Picinguaba e Parque Estadual da Ilha Anchieta) até a Ilha do Cardoso - litoral sul (Estação Ecológica Juréia-Itatins, Vila de Pedrinhas no município de Ilha Comprida e Parque Estadual da Ilha do Cardoso). Os objetivos foram: correlacionar a floresta baixa e alta de restinga com os parâmetros químicos e físicos do solo, caracterizar o estrato arbóreo de florestas de restinga alta e baixa do litoral do estado de São Paulo, verificar se há similaridade florística entre as áreas e analisar se a similaridade está associada ao solo. A amostragem do solo foi realizada nas profundidades 0 – 5, 5 – 10, 10 – 15, 15 – 20, 0 – 20, 20 – 40 e 40 – 60 cm. Para cada profundidade foram analisados pH, M.O., P, K, Ca, Mg, Al, H+Al, m, SB, CTC e V e análises granulométricas. A amostragem das espécies arbóreas foi feita por meio do “método de quadrantes”. O critério para inclusão amostral considerou todos os indivíduos arbóreos com diâmetro à altura do peito (DAP) maior ou igual a 1,6 cm, inclusive aqueles que apresentavam duas ou mais ramificações do caule abaixo de 1,30 m, cuja soma dos DAPs fosse igual ou maior do que 1,6 cm. Para as análises multivariadas, foram utilizadas amostras de solo na profundidade 0 – 10 cm. Os resultados foram: Independentemente dos processos geológicos, os solos de restinga são semelhantes entre si, quanto a sua fertilidade e textura; Nas áreas em que ocorreram solos espódicos (floresta alta e baixa de restinga da Ilha Anchieta e floresta alta da Juréia - Itatins), ocorre valores mais elevados, em profundidade, de matéria orgânica, CTC e alumínio; Os solos de floresta de restinga alta... / This work covered the coast of São Paulo, from Ubatuba - north coast (Serra do Mar State Park - Picinguaba core and Ilha Anchieta State Park) to Ilha do Cardoso - south coast (Juréia Ecological Station – Itatins, Vila de Pedrinhas in the city of Ilha Comprida and the Cardoso Island State Park). The objectives were: to correlate low and high restinga forest with the soil’s chemical and physical parameters, characterize the tree layer of high and low restinga forest of São Paulo Coast, verify if there is any vegetation similarity among the areas and to analyze if similarity is associated to the soil. Soil sampling was made at 0 – 5, 5 – 10, 10 – 15, 15 – 20, 0 – 20, 20 – 40 e 40 – 60 cm depth. For each depth pH, M.O., P, K, Ca, Mg, S, Al, H+Al, Na, B, Cu, Fe, Mn, Zn, m, SB, CTC e V and granulometric analysis were carried. Tree species sampling was done through the “quarter method”. For multivariate analysis, soil samples used were of 0 – 10 cm depth. The criterion for inclusion in the sample considered all trees with diameter at chest height (DCH) greater than or equal to 1.6 cm, including those who had two or more branches below 1.30 m, whose sum of DCHs were equal to or greater than 1.6 cm. The results showed that regardless of the geological processes, the resting soils are similar to each other about their fertility and texture; In areas where spodic soils occurred (high and low restinga forest at Ilha Anchieta and high forest at Juréia - Itatins) higher values in depth, organic matter, CTC and aluminum are presented; high and low resting forest soils are naturally low in nutrients, with the largest reserves concentrated in the depths 0 - 5, 5 - 10 and 0 - 20 cm; Sand fraction is dominant for all high and low restinga forest areas studied, always... (Complete abstract click electronic access below)

Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / O presente trabalho investiga o Uso e OcupaÃÃo do Solo nos 6 km da Praia do Futuro, no litoral leste de Fortaleza-CearÃ, limitada pelo recorte entre a faixa de praia, a rua Trajano de Medeiros, a rua Ismael PordÃus e o estuÃrio do rio CocÃ, na praia do CaÃa e Pesca. Neste trabalho buscou-se um resgate histÃrico do local como tentativa de melhor compreensÃo da situaÃÃo presente, objetivando analisar os motivos dos bairros contÃguos à Ãrea de estudo apresentarem um padrÃo quanto aos Usos e OcupaÃÃes do Solo mais intensos em comparaÃÃo com os da Praia do Futuro. Foram feitas entrevistas com os agentes principais da Ãrea, desde os ocupantes irregulares das dunas, atà proprietÃrios de hotÃis. Utilizando-se em uma maior intensidade de pesquisas hemerogrÃficas, foi possÃvel obter dados elucidativos dos Ãltimos 40 anos dessa faixa de praia do litoral Cearense, jà que pouco material à disponÃvel na literatura ou trabalhos acadÃmicos. A busca da interdisciplinaridade permeou todo o trabalho, utilizando-se de uma metodologia sistÃmica, basicamente como tentativa de obter respostas aos impactos ambientais naturais e a utilizaÃÃo da metodologia dialÃtica como tentativa de propiciar formulaÃÃes de hipÃteses para os impactos ambientais antrÃpicos, que juntas sÃo determinantes para a atual prÃtica do Uso e OcupaÃÃo do Solo na Praia do Futuro. Essa pesquisa objetiva propiciar caminhos para o entendimento da Ãrea em questÃo e servir de instrumento outros para trabalhos tÃcnicos, onde leve-se em conta todas as peculiaridades do local e a noÃÃo do Desenvolvimento SustentÃvel seja sempre buscada. Esta pesquisa teve apoio financeiro do Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico (CNPQ) e apoio tÃcnico da Universidade Federal do CearÃ. / This work investigates land use and occupation alone the 6km of Future beach, at the east seaside of Fortaleza-CearÃ, limited by the sea (Atlantic ocean), at one side; the road Trajano de Medeiros, the road Ismael PordÃus and the estuary of Cocà river, at CaÃa e Pesca beach.In this work we tried an historical account of the place as an attempt to better understand its present situation, aiming at amusing the reasons why the neighbor suburbs show much denser standards of land use and occupation than the Future beach. Interviews were made with the main agents within the area, from the irregular users to hotel owners. By making use of research concerning published news on local newspapers, it was possible to get data covering the last 40 years of the seaside place, as there is very few available literature or academic work related to it. The search for an interdisciplinary approach has adapted throughout this work, using systematic methodology, basically as the work, using the systemic methodology, basically as an attempt to get answers to natural environmental impacts, and use the dialectic methodology in order to formulate hypothesis to human environmental impacts, which together are determinant to the actual pattern of land use an occupation at Future beach. This research also aims to provide means for understanding of the area under study as well as being useful as tool for others to work with, where as all particular characteristics of the place can be taken into account and the notion of sustainable development be always sought. This research was made possible with the support of the national council for research and development (CNpq) and the Federal University of CearÃ

O mapeamento da Plataforma Continental Interna visando localização, qualificação e quantificação das reservas de material litoclásticos marinho possui poucos trabalhos relacionados. O Estado de Pernambuco sofre com erosões ao longo de todo seu litoral, e principalmente junto às cidades de Recife e Olinda. Assim, este estudo contribui tanto para o conhecimento da sedimentologia da plataforma continental interna adjacente ao Porto do Recife e à Praia dos Milagres em Olinda, quanto para a execução de futuras intervenções na recuperação das praias da região. Portanto, com objetivo de identificar áreas com concentrações de granulados litoclásticos marinhos compatíveis com especificações necessárias à regeneração de praias, foram analisadas 36 amostras, que foram coletadas ao longo de seis perfis equidistantes em 1 km, perpendiculares à linha de costa na plataforma interna do Porto do Recife. Em laboratório foram realizadas análises granulométricas e o estudo composicional de todas as amostras. Os resultados granulométricos mostram a predominância de sedimentos mal selecionados, ocorrendo classes variadas de tamanho entre seixo pequeno (8 mm) e lama (< que 0,062 mm), com predominância da fração areia grossa. A análise composicional revelou uma hegemonia de carbonatos marinhos. Os dados obtidos apresentam uma redução do suprimento sedimentar terrígeno local. Também de acordo com os resultados obtidos no presente estudo, a plataforma continental interna adjacente ao Porto do Recife e à praia dos Milagres em Olinda-PE, é essencialmente recoberta por areias biogênicas mal selecionadas, oriundas da morte e fragmentação dos organismos componentes dos recifes coralíneos e algálicos que ocorrem na plataforma continental interna. Dessa forma, esta área não possui material siliciclástico suficiente para ser utilizado na exploração mineral para recuperação artificial de praias no Estado de Pernambuco. / There are few studies that map the Internal Continental Platform referring to localization, qualification and quantification of reserves of litoclastic marine material. The Brazilian state Pernambuco suffers from erosions along the whole coast and particularly in areas close to the cities of Recife and Olinda. This study offers new knowledge about the sedimentology of the internal continental platform adjacent to the harbor of Recife and the Beach Milagres in Olinda. Furthermore, it points out measures that can be used to recover regional beaches. Along 6 profiles with a distance of 1km and perpendicular to the coast line at the internal platform of the harbor of Recife, 36 samples were collected and analyzed. Thus, areas with concentrations of litoclastic marine aggregates with the necessary characteristics for the recovery of the beaches were identified. A laboratory was used for granulometry and a compositional study of all samples. The granulometric results show mainly badly selected sediments. There are different sizes from small pebbles (8 mm) to mud (< than 0,062 mm), predominantly coarse sand fraction. The compositional analysis reveals hegemony of marine carbonates. Thus the obtained data indicates a reduction of local terrigenous sedimentary supply. This is probably due to the fact that the selected area is undergoing an initial transgressive process. Also in accordance with the obtained results of this study, the internal continental platform adjacent to the harbor of Recife and the Beach Milagres in Olinda, Pernambuco, is mainly covered by badly selected biogenic sand which has its origin in the death and fragmentation of components of the coral reef of the internal continental platform. As a result the area is not indicated to mineral exploration for the artificial recovery of the beaches in the state of Pernambuco.

As praias urbanizadas são ambientes complexos devido à interação da ocupação antropogênica e dos processos costeiros. A ocupação costeira vem se caracterizando por alteração e deterioração da paisagem, processo mais intenso em grandes cidades litorâneas, onde casas e edifícios são construídos nas proximidades imediatas da orla. O presente trabalho analisa a morfodinâmica e processo de sobrelavagem das praias de Santos e Itararé, duas praias urbanizadas com a presença de obras na orla. Foram realizados levantamentos topográficos nas praias e modelagem de ondas (Delft 3D - Wave) para toda a baía durante os anos de 2015 e 2016. Cenários de sobrelevaçãoonda e nível do mar foram estipulando para o cálculo da sobrelevaçãototal e assim conhecer as condições que levam a sobrelavagem. A baía de Santos encontra-se aberta para sul, expondo a linha de costa para a ação de frentes frias. A variabilidade do clima de ondas, derivada das mudanças das suas condições meteorológicas formadoras, pode alterar a morfologia da praia. Em Santos e São Vicente as ondas de sul e sudeste apresentam maiores alturas de onda e são mais frequentes no outono e inverno quando temos mais frentes frias na região. Os resultados indicam relação entre a incidência de ondas com maior força de onda (W/m), associadas a frentes frias, em trechos mais inclinados das praias com perda de volume. A variedade de incidência das ondas ao longo da praia estudada mostra um decréscimo na força de onda, sendo maior em Itararé e caindo em direção a Ponta da Praia, com a presença de picos altos na Ponta da Praia. Justificando porque este trecho sofre mais variação de volume e perda de sedimento fato que pode estar associado a dragagem do canal do porto de Santos. Em ambos os trechos com maior declividade e menor faixa de areia apresentaram maior sensibilidade à ação das ondas e também maior chance de sofrer sobrelavagem, de todo o arco praial da baía de Santos a porção leste de Santos se mostrou a mais propícia a sofrer inundação. / Urbanized beaches are more complex environments due to the interaction of anthropogenic occupation and coastal processes. Coastal occupation has been characterized by alteration and deterioration of the landscape, being more intense in large coastal cities, where houses and buildings are built in the immediate vicinity of the beach border being subject to potentially high risk of erosion. The present work analyzed the morphodynamics and overwashing of the beaches of Santos and Itararé, two urbanized beaches with the presence of anthropogenic constructions in the beach border. Topographic surveys on both beaches and wave modeling (Delft 3D - Wave) were carried out for the entire basin during the years of 2015 and 2016. Wave run-up and sea level scenarios were stipulated for the calculation of the total water level and so determined conditions that lead to overwashing. The bay of Santos is open to the South, exposing the coast line for the action of cold fronts. The variability of the wave climate, derived from the changes of its formative meteorological conditions, can alter the morphology of the beach. In Santos and São Vicente, South and Southeast waves have higher wave height and are more frequent in autumn and winter when we have more cold fronts in the region. The results indicate the direct relationship between the incidence of waves with higher wave force (W/m), associated with cold fronts, with loss of volume along the beaches. The variety of wave incidence along the studied beach shows a decrease in wave force, being higher in Itararé and falling towards Ponta da Praia, in the area protected by the rocky promontory. However in Ponta da Praia we see high values of wave force, justifying why this stretch suffers more volume variation and loss of sediment, that we belive happends because of Port Channel. In both stretches with greater slope and lower sand range showed greater sensitivity to the action of the waves and also greater chance of overwash, of all the praial arc of the Santos bay, the Eastern portion of Santos was the most propitious to suffer flooding.

As praias urbanizadas são ambientes complexos devido à interação da ocupação antropogênica e dos processos costeiros. A ocupação costeira vem se caracterizando por alteração e deterioração da paisagem, processo mais intenso em grandes cidades litorâneas, onde casas e edifícios são construídos nas proximidades imediatas da orla. O presente trabalho analisa a morfodinâmica e processo de sobrelavagem das praias de Santos e Itararé, duas praias urbanizadas com a presença de obras na orla. Foram realizados levantamentos topográficos nas praias e modelagem de ondas (Delft 3D - Wave) para toda a baía durante os anos de 2015 e 2016. Cenários de sobrelevaçãoonda e nível do mar foram estipulando para o cálculo da sobrelevaçãototal e assim conhecer as condições que levam a sobrelavagem. A baía de Santos encontra-se aberta para sul, expondo a linha de costa para a ação de frentes frias. A variabilidade do clima de ondas, derivada das mudanças das suas condições meteorológicas formadoras, pode alterar a morfologia da praia. Em Santos e São Vicente as ondas de sul e sudeste apresentam maiores alturas de onda e são mais frequentes no outono e inverno quando temos mais frentes frias na região. Os resultados indicam relação entre a incidência de ondas com maior força de onda (W/m), associadas a frentes frias, em trechos mais inclinados das praias com perda de volume. A variedade de incidência das ondas ao longo da praia estudada mostra um decréscimo na força de onda, sendo maior em Itararé e caindo em direção a Ponta da Praia, com a presença de picos altos na Ponta da Praia. Justificando porque este trecho sofre mais variação de volume e perda de sedimento fato que pode estar associado a dragagem do canal do porto de Santos. Em ambos os trechos com maior declividade e menor faixa de areia apresentaram maior sensibilidade à ação das ondas e também maior chance de sofrer sobrelavagem, de todo o arco praial da baía de Santos a porção leste de Santos se mostrou a mais propícia a sofrer inundação. / Urbanized beaches are more complex environments due to the interaction of anthropogenic occupation and coastal processes. Coastal occupation has been characterized by alteration and deterioration of the landscape, being more intense in large coastal cities, where houses and buildings are built in the immediate vicinity of the beach border being subject to potentially high risk of erosion. The present work analyzed the morphodynamics and overwashing of the beaches of Santos and Itararé, two urbanized beaches with the presence of anthropogenic constructions in the beach border. Topographic surveys on both beaches and wave modeling (Delft 3D - Wave) were carried out for the entire basin during the years of 2015 and 2016. Wave run-up and sea level scenarios were stipulated for the calculation of the total water level and so determined conditions that lead to overwashing. The bay of Santos is open to the South, exposing the coast line for the action of cold fronts. The variability of the wave climate, derived from the changes of its formative meteorological conditions, can alter the morphology of the beach. In Santos and São Vicente, South and Southeast waves have higher wave height and are more frequent in autumn and winter when we have more cold fronts in the region. The results indicate the direct relationship between the incidence of waves with higher wave force (W/m), associated with cold fronts, with loss of volume along the beaches. The variety of wave incidence along the studied beach shows a decrease in wave force, being higher in Itararé and falling towards Ponta da Praia, in the area protected by the rocky promontory. However in Ponta da Praia we see high values of wave force, justifying why this stretch suffers more volume variation and loss of sediment, that we belive happends because of Port Channel. In both stretches with greater slope and lower sand range showed greater sensitivity to the action of the waves and also greater chance of overwash, of all the praial arc of the Santos bay, the Eastern portion of Santos was the most propitious to suffer flooding.

A Ilha Comprida, localizada no litoral sul do Estado de São Paulo, é uma ilha-barreira arenosa holocênica de 63 km de comprimento por até 5 km de largura, limitada a SW pela desembocadura de Cananéia, e a NE, pela desembocadura de Icapara. Seu sistema praia - duna frontal teve grande variação no tempo, como evidenciado por sucessivos truncamentos de cordões litorâneos. Em escala de tempo mais restrita, dentro dos últimos 200 anos, coberta pelo registro histórico e cartográfico e por fotografias aéreas, as mudanças morfológicas mais significativas concentram-se no extremo nordeste da ilha. Incluem a variação de largura na área hoje caracterizada pelo máximo estrangulamento da ilha, a formação de um pequeno campo de dunas transgressivo nesta mesma área, o surgimento em 1943 de uma projeção da linha de costa, atualmente em estágio avançado de erosão, e o aparecimento intermitente e sucessivo de embaiamentos lagunares no setor adjacente da ilha de Iguape. A abertura do canal artificial do Valo Grande, em 1852, atuou de modo direto ou indireto em pelo menos parte destas mudanças. O aumento de vazão, de retrabalhamento de sedimentos arenosos e portanto de aporte de carga de fundo, devido ao Valo Grande, induziu o surgimento de ilhas arenosas e a formação de ?manchas de areia? no fundo do canal lagunar, bem como a intensificação da dinâmica de meandramento da desembocadura de Icapara, implicando possível aceleração na migração desta desembocadura rumo NE e no próprio crescimento longitudinal da barreira. O sistema praia - duna frontal da Ilha Comprida apresenta também grande variação no espaço, evidenciada pela alternância ao longo de sua extensão de morfologias diferentes, o que pode ser atribuído à intercalação entre setores de caráter deposicional e erosivo. As extremidades da barreira caracterizam-se pela ocorrência marcante de pequenos campos de nebkhas sobre terraços baixos de dunas frontais (<0,5 m). A presença dessas feições pode ser relacionada à contínua progradação próximo às desembocaduras lagunares de Icapara e de Cananéia. A zona erosiva mais evidente encontra-se na extensão centro-sul da praia, como evidenciado pela ocorrência de cordões antigos truncados pela linha de costa atual, e pela redução em tamanho de dunas frontais ativas incipientes e estabelecidas, as quais aparecem por vezes com falésias vivas associadas. Na mesma região, a morfodinâmica muda de regime dissipativo para intermediário, com presença de cúspides de espraiamento e berma. Esta região, ademais, concentra a mais alta variabilidade e complexidade de morfologia de dunas (i.e. cordões de dunas incipientes e estabelecidas obliquamente amalgamadas), além de uma concentração maior de dunas do tipo rampa. No restante do sistema, predomina ampla face de praia de baixa declividade (média de 0,66o), com tendência para formas mais estáveis de dunas frontais (terraços e cordões). Medidas estatísticas de distribuição granulométrica (diâmetro médio, desvio-padrão e assimetria) obtidas através do método dos momentos de Pearson, permitiram inferir, pela regra de McLaren, duas células de deriva litorânea longitudinal principais. A célula nordeste, dirigida para NE, abrange aproximadamente 53 km, e a célula sudoeste toma em sentido oposto (SW) os restantes 10 km. As duas zonas de pólo deposicional de deriva são caracterizadas por amplos e baixos terraços de dunas frontais incipientes progradacionais. A zona de divergência entre as células de deriva coincide com a região de erosão costeira mais intensa. A distribuição em massa de minerais pesados é concordante com o transporte longitudinal verificado. Responde a isso a tendência de aumento de minerais de menor equivalente hidráulico (em geral, quimicamente mais instáveis) a despeito da redução de minerais de equivalente hidráulico mais alto (em geral, quimicamente mais estáveis) no rumo de transporte. A integração dos resultados obtidos por análise morfológica (fotointerpretação e estudo de feições de campo) e sedimentológica (granulometria e minerais pesados) permitiu estabelecer um modelo morfodinâmico para o sistema praia - duna frontal recente da Ilha Comprida. Neste modelo, a fase final de evolução da ilha é atribuída tanto à superação do obstáculo ao crescimento longitudinal exercido pelo morro de Icapara, quanto ao incremento de carga sedimentar na desembocadura de Icapara, induzido pela abertura do Valo Grande. / Ilha Comprida is a Holocene sandy barrier-island located on the south coast of São Paulo State, 63 km long and 2 to 5 km wide. Its transverse boundaries are Cananéia and Icapara inlets, at the SW and NE, respectively. The beach-foredune system of Ilha Comprida have experienced intense morphological variation in time, as showed by the successive truncations of littoral ridges. In a more restricted time-scale (at least 200 years) as covered by historical and cartographic records and aerial photographs, the most relevant changes have occurred on the northeast extremity of the island. These changes include: i) variation in width at the present most narrow region; ii) formation of a little transgressive dunefield (2 km2) in the same region; iii) initiation (in 1943) of a projection in the coastline, actually in advanced erosional state; iv) intermittent and successive appearing of lagoonal embayments at the neighboring sector of the Iguape island. The opening of the Valo Grande artificial channel, in 1852, acted either directly and indirectly on these changes. The increase of sedimentary bed-load supply induced the appearance of sand islands and submerged sand patches along the lagoonal channel. Beside this, the increasing meandering of Icapara inlet forced its rapid migration to the NE, and the longitudinal growing of the barrier. The beach-foredune system also shows great variability alongshore, observed on the morphologic alternance of depositional and erosional sectors. The tips of the barrier are characterized by the marked occurrence of small nebkha fields on foredune terraces (up to 0.5 m high). These aeolian morphological features can be related with a continuous progradation nearly Icapara and Cananéia inlets. The most-evidenced erosional zone stays at the mid-southwestern portion of the beach, as observed on the truncation of former beach and foredune ridges by the present coastline, and on the reduction in size of active incipient and established foredunes (that often appears with active cliffs). In the same region, the coastal morphodynamics changes from dissipative to intermediary beach, with presence of swash cusps and berm. Moreover, this site concentrates the highest variability and complexity of dune morphology (e.g. obliquely amalgamated incipient and established foredune ridges), beyond a increasing occurrence of ramp foredunes. In the remains of the beach-dune system, large shorefaces of low declivity (0.66o in mean), with tendency to more stable shapes of foredunes (terraces and ridges), are dominant. Statistical measures on the distribuition of granulometric frequencies (mean diameter, standard deviation, skewness), calculated through the Pearson?s moments method, indicate according to the McLaren rule two main longshore drift cells. The northeastern cell, oriented towards the NE, comprises about 53 km. The southwestern cell, comprising the remaining 10 km, is oriented towards the SW. The two depositional poles of longshore drift cells are characterized by wide and flat progradational, incipient foredune terraces. The divergence zone among these longshore cells drift coincides with the zone of the most intense coastal erosion. The mass distribution of heavy minerals is in agree with the deduced directions of longshore transport. This fact is confirmed by the tendency of increasing concentration of minerals with minor hydraulic equivalence (usually, more unstable minerals) in despite of reduction of minerals with high hydraulic equivalence (usually, more stable minerals) along the net longshore drift direction. The integration of data obtained by morphologic analysis (interpretation of aerial photographs and field features) and sedimentology (grain size, heavy minerals), allowed to postulate a morphodynamic model for the recent beach-foredune system of Ilha Comprida. According to this model, the late phase of barrier evolution is related both to the surpassing an obstacle to longitudinal growth (Icapara hill), and to the increasing sedimentary input at the Icapara inlet, favored by the opening of the Valo Grande channel.

Institutionalized racial segregation in the United States has had a significant impact on many aspects of American culture. Segregation was practiced in every aspect of public life, even in areas of recreation. For those labeled as "nonwhite," even going to the beach was legally restricted. The events between the 1950s and 1960s at Homestead Bayfront Beach in Homestead, Florida are evidence that social stratification based on the social categorization of race has a significant effect even today. This research examines how legalized segregation in the past impacted society and contributed to the development of a place and identity at Homestead Bayfront Beach. This analysis not only fills a gap in the historical record on segregation and recreation in the United States, but also contributes to research on place and place making and the formation of memory and identity.

Optically stimulated luminescence (OSL) dating beach ridge sediments is one method for resolving barrier island growth at intermediate scales (decades-centuries), information that is lacking for Louisiana. This research combines OSL, GPR, aerial imagery, and cores to document temporal and spatial evolution of a Louisiana barrier island. Grand Isle is composed of beach ridges organized in distinct, unconformable sets that began forming 0.75 ka until 0.575 ka when deposition ceased, the ridges were partially eroded, and deposition resumed in a more eastward direction. The central ridges formed between 370±30 and 170±10 years ago at a rate of one ridge every 11.6 years with sand from the eroding Caminada headland that, with flanking barriers, forms the Bayou Lafourche transgressive depositional system. Grand Isle’s lithosome (92,600,000 cubic meters) requires an annual longshore transport of 128,625 cubic meters. The lithosome thickness (10 meters) and steady sediment supply stabilize the island relative to other Louisiana barriers.

Water treatment facilities across the United States are known for providing high-quality drinking water to their residents. However, differences in treatment methods, aging infrastructure, and outdated household plumbing may affect the quality of drinking water by the time it reaches the consumer’s tap. Palm Beach County, Florida, is an area with large socioeconomic contrasts where some families live in dilapidated structures and others reside in luxurious, gated communities. This research highlights the variation of household water quality by determining metal concentrations in tap water samples in communities of different socioeconomic status. In addition, interviews were conducted with personnel from five different Water Treatment Plants (WTPs) in the study area to understand the relationship between customers and their water utility. Results indicate that effective communication strategies are needed to boost public trust and fill critical information gaps about the water treatment process. Ninety-six tap water samples were collected from households throughout eastern Palm Beach County and analyzed for different metals using Inductively Coupled Plasma Optical Emission Spectrometry. Surveys were also administered at the same households where tap water samples were collected. Residents were asked about their perceptions of tap water and social and economic questions regarding their household characteristics. A Socioeconomic Status (SES) index was created using Principal Components Analysis (PCA) to understand how perceptions of tap water quality and concentrations of metals in household tap water vary based on SES. Results provide evidence that those living in the lowest-ranking SES neighborhoods are the least satisfied with their tap water quality and consume less tap water than those living in higher SES neighborhoods. Water quality results highlighted large variations in concentrations of aluminum (Al) and thus, analyses focused specifically on how Al concentrations varied according to SES. Results from Ordinary Least Squares regression show that as socioeconomic status decreases, the concentration of Al in tap water increases. Six samples exceed the State of Florida’s Secondary Maximum Contaminant Level (SMCL) for Al, and five of those samples were found in the lowest-ranking SES neighborhoods (SES 1 and 2). The results of this research provide evidence that inequities in household water quality exist across eastern Palm Beach County, Florida. / Includes bibliography. / Dissertation (Ph.D.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection

Open-coast beach-dune environments are vulnerable to erosion, such as from storms or interruption of littoral drift. Although protected from event-driven wave energy, backbarrier shorelines are also susceptible to erosion, due to tidal currents and boat wakes. A common response to mitigate erosion is to place sediment and restore the environment. For placement on beaches, a significant effort has been made to identify offshore resources available; however, offshore resources have seldom been considered for dune or backbarrier shoreline restoration. This study evaluates the geotechnical sediment properties of offshore sediments in proven borrow areas for beach nourishment and reclassifies them for placement in dunes and along the backbarrier in Palm Beach County, Florida. Two different methods calculate volume of offshore resources available for dune or backbarrier projects, including numerical calculations and interpolation of volume through SURFER. Because existing proven borrow areas are delineated for beach nourishment, less volume of sediment available in these areas for other coastal environments. The results of this study suggest that identifying offshore sediment sources for lower-energy environments would not adversely impact sediment needed for beach nourishment. As coastal environments are increasingly threatened by climate change and sea level rise, sediment resources become scarcer, the need to efficiently and effectively use sediments will be of utmost importance for scientists, engineers, and managers in their efforts to protect coastal habitat and communities. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection