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Balanço de sedimentos arenosos da enseada de Balneário Camboriú-SCMenezes, João Thadeu de January 2008 (has links)
O objetivo principal deste estudo é a análise do balanço de sedimentos arenosos na enseada de Balneário Camboriú, localizada no litoral centro-norte do Estado de Santa Catarina. Para alcançar os objetivos deste trabalho a enseada foi compartimentada em células e utilizadas diferentes metodologias que envolveram a análise de diversos parâmetros, tais como: sedimentologia e morfologia da praia e antepraia; estabilidade da praia em planta e perfil; perfil de equilíbrio da enseada; transporte de sedimentos por ondas e correntes e perda de sedimentos para fora da praia através dos banhistas. A praia de Balneário Camboriú é composta de areia fina a muito fina, de composição quartzosa, bem a moderadamente classificados. A distribuição das fácies sedimentares da enseada de Balneário Camboriú demonstra a inexistência de trocas de sedimentos arenosos da praia com a região da antepraia, sendo esta dominada principalmente por sedimentos finos (silte e argila). A estabilidade da praia em planta encontra-se em equilíbrio dinâmico na porção norte e sul da enseada. A morfologia praial em valores de variação de volume e largura demonstrou que os perfis localizados na porção norte, que corresponde a região mais exposta da praia, apresentam maiores variações do que os demais perfis localizados nas porções mais protegidas. Verificou-se um processo de rotação praial entre os perfis, havendo acresção em alguns enquanto ocorre erosão em outros, mostrando uma troca de sedimentos entre eles. O volume de sedimentos ganho pela praia entre 1994 e 2005 foi de aproximadamente 49.000 m3 que foram adicionados artificialmente por uma obra de alimentação executada pela prefeitura municipal. A profundidade de fechamento apresenta um comportamento gradacional, com diminuição dos valores de norte para o sul da enseada, em acordo com os padrões de distribuição do fluxo de energia das ondas e correntes. Os valores definidos para a profundidade de fechamento variam entre 4 m e 1,7 m. Este limite de profundidade é também demonstrado na variação faciológica entre a praia e antepraia. Os cenários de refração, difração de ondas e transporte de sedimentos associado demonstrou que a praia se comporta como uma célula fechada, não havendo troca significativa de sedimentos entre esta e a região de antepraia. Portanto, gerando um balanço arenoso nulo entre estes dois ambientes. Verificou-se, que o volume sedimentar removido da praia pelos banhistas não causou grande impacto no balanço de sedimentos durante o período amostral. Por outro lado, sugere-se que em longo prazo, esta retirada de areia possa representar um déficit mais significativo, da ordem de 970m³. O cálculo do balanço de sedimentos arenosos para a praia e enseada de Balneário Camboriú apresentou um valor negativo de 152 m3/ano. Este valor pode ser considerado mínimo quando comparado ao volume total de sedimentos da praia, e corresponde a metade do valor calculado para a perda anual de sedimentos causadas pelos banhistas Com isso pode-se concluir que a enseada de Balneário Camboriú está em equilíbrio quanto ao balanço sedimentar, sem perdas e ganhos de sedimentos consideráveis. / The overall goal of this study is the sandy sediment budget analysis in the Balneário Camboriú bay, located in central-northern coast of Santa Catarina State. To achieve the objectives of this work the bay was compartments in cells and used different methodologies that involved the analysis of various parameters such as: the beach and bay sedimentology and morphology; planform and profile beach stability; equilibrium beach profile; sediment transport by waves and currents and loss of sediment through the beach users. The Balneário Camboriú beach is composed of the fine and very fine sand, quartz and to moderately classified. The sedimentary facies distribution shows there are no exchanges of sediment from the sandy beach with the bay, dominated mainly by fine-grained sediments (silt and clay). The planform beach stability is in dynamic equilibrium in the north and south beach portion. The beach morphology change in volume and width values showed that the profiles located in the northern portion, more exposed to the beach, have more variations than the other profiles located in portions more protected. There was a process of beach rotation between the profiles, there was accretion in some profiles and erosion in others, showing an exchange of sediment between them. The sediment volume gain the beach between 1994 and 2005 was approximately 49,000 m3 which were artificially added to the beach for nourishment implemented by Municipality. The depth of closure presents a gradational behavior, with declining values of north to the south of the bay, in accordance with the waves and currents flow of energy distribution patterns. The values defined for the depth of closure ranging from 4 m to 1.7 m. This limit of depth is also shown in facies variation between the beach and shoreface. The waves refraction and diffraction scenarios and sediment transport showed that the beach is behaving like a closed cell, with no exchange between beach and shoreface. Therefore, generating a null balance between these two sandy environments. It was found that the sediment volume removed by users beach causes no major impact on the coastal sediment sampling during the period (summer 2003/2004). Moreover, it is suggested that a long-term Balneário Camboriú, the sand removal could present a more significant deficit in the coastal sediment, as this beach is mostly populated flow in twenty years where the sediment volume would be withdrawn from 970m³ . The beach and shoreface Balneário Camboriú sandy sediment balance calculation presented a negative value of 152 m3/year. This quantities can be considered minimal when compared to the total sediment volume from the beach. The estimated value is half the value calculated for the loss of sediment removed by users. This can be concluded that the inlet of Balneário Camboriú bay is totally balanced on the sediment, with no considerable sediment losses and gains.
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Localização residencial e demanda por recreação: um modelo para cidades litorâneas. / Residencial locaton and recreation demand: a model for coastal cities.Côrtes, Marcus Vinicius Rolemberg 15 August 2008 (has links)
Os modelos clássicos de economia urbana, que tencionam descrever a estrutura espacial e de preços de residências das cidades, são, em grande parte, focados nos custos de transporte, o que acaba dando grande ênfase à distância ao local de trabalho. A acessibilidade a outras amenidades é o âmago de diversos trabalhos recentes, entre essas a distância à praia. O alto valor de lotes à beira mar nas cidades litorâneas brasileiras e a crescente demanda por lazer sugerem que a acessibilidade e a vista para a praia estão fortemente relacionadas com o preço da moradia. O modelo desenvolvido neste trabalho aspira explicar a ligação entre a demanda por recreação e o custo da moradia em cidades litorâneas. Para alcançar o objetivo proposto são discutidos diversos aspectos entre eles a acessibilidade ao local de trabalho, o número de trabalhadores de uma família e diferentes preferências entre estes. / The classical models of urban economics tend to describe the spatial structure of housing as well as their pricing in urban areas. Therefore, they focus on the cost of transportation by giving emphasis toward the distance to the working place. The accessibility of other amenities, e.g. beaches, is at the centre of various recent papers. High prices for real estate close to the seashore in coastal Brazilian cities and the rising demand for leisure time imply that reachability and a view to the beach are strongly linked with the housing price. The model that is going to be developed in this paper aims at explaining the connection between the demand for leisure and the housing prices of coastal cities. In order to achieve this goal, different topics like the accessibility to the working place, the number of working family members and their different kinds of preferences are going to be treated.
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Use of Ground Penetrating Radar (GPR) in a Study on Beach Morphodynamics at Red Reef Beach, Boca Raton, FloridaUnknown Date (has links)
The internal architecture of a beach system can provide clues into the processes
involved in its formation, including depositional processes, and/or driving mechanisms
(Billy et al., 2014). Several unique events such as cold fronts or Hurricane Irma caused
conditions that resulted in erosion and accretion changes in Red Reef Beach - Boca Raton,
throughout the year of 2017. Since the lateral extent of these changes is difficult to evaluate
using traditional methods such as coring, a Ground Penetrating Radar (GPR) was tested,
which allows for a good lateral resolution (cm scale), to image the distribution and
evolution of these sediments. The objectives of this study were to 1) explore the lateral
variability in the internal architecture of sediments in Red Reef beach in Boca Raton (FL)
using an array of ground penetrating radar (GPR) measurements constrained with coring
and sediment analysis; 2) explore how dynamics of erosion and accretion induced by
changes in wave activity and related to tide variation and storm events, may affect surface topography and the sedimentary internal architecture of beach deposits, using RTK GPS
and GPR time-lapse measurements; 3) to explore changes in the lateral extent of the freshsaltwater
interface along the beach profile in relation to tide variation and storm events.
Reflectors identified in the GPR images showed some evidence of erosional and
accretionary surfaces preserved in Red Reef beach. These measurements were repeated
over time coinciding with certain events (such as Hurricane Irma) to explore their effects
in terms of sediment erosion and accretion as reflected in changes in topography (using
time-lapse GPS-RTK measurements), and changes in the internal sedimentary architecture
(using time-lapse GPR measurements). The datasets collected also revealed the temporal
evolution of the salt-freshwater interface, showing how the lateral extent of saltwater
saturated sediment (inferred from areas of GPR signal attenuation along the profiles)
evolved over time. This study shows the potential of GPR to provide information about
beach sediment processes and dynamics at resolutions beyond traditional measurements
(such as coring). It also shows the importance of combining methods that are
complementary, such as the use of RTK GPS to explore changes in topography, and GPR
that provides information on subsurface sedimentary architecture and the mechanism of
change such as post-storm recovery. This study has implications for better understanding
changes in coastal sedimentary deposits and processes, both at the subsurface, particularly
after high-energy events, such as hurricanes, that result in rapid changes in erosion and/or
accretion of sediments. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2017. / FAU Electronic Theses and Dissertations Collection
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Aspects of the ecology of sandy beaches along Durban's urbanised coastline.Govender, Natasha. January 2009 (has links)
Urban sandy beaches are the primary focus of numerous pressures. Among these are
the disruption of sand budgets because of an increasing demand for coastal
infrastructure, pollution from landward sources, and recreation and the associated
stressors such as trampling and off-road vehicles. More recently, climate change and
the manifestations thereof, such as sea-level rise and increased storminess have added
to the suite of threats to sandy beach ecosystems. Despite being important natural and
economic resources these urban systems have not received adequate research
attention and, consequently, the management of sandy beaches has been based on
ecologically unsustainably principles.
The aims of this study were to provide baseline biodiversity information of
urban beaches along the Durban coastline, South Africa, as a step toward the
application of improved ecological management procedures for metropolitan beach
ecosystems. Macro- and meiofaunal communities of 15 representative beaches along
the Durban coastline were quantitatively surveyed using standard sandy beach
sampling protocols.
This study showed that Durban’s beaches, despite being highly urbanised,
harbour rich and abundant faunal communities. This is contrary to previous findings
that reported a paucity of life on Durban beaches. A total of 23 macrofauna taxa were
identified, with the dissipative Battery Beach having highest diversity with 13
macrofaunal species. La Lucia, a reflective beach, had the highest macrofaunal
abundance and was the second most diverse beach, thus departing from global trends
that report a poor macrofaunal community of reflective beaches. Twenty higher-level
meiofauna taxa were recorded in this study and it was found that meiofauna
abundance showed a significant and positive relationship with beach width. Because
of the coarse taxonomic resolution, meiofauna diversity may likely be much greater
than that recorded in this study.
The conventional view that sandy beaches are resilient to exploitation was
questioned when it was found that meiofauna assemblages were significantly and
negatively impacted by stormwater outlets on two of the sampled beaches, possibly
through freshwater intrusion or erosional effects. This raises questions regarding the
functioning of beach ecosystems, and the services they provide, when faced with
anthropogenic stressors that impact faunal communities.
This snapshot survey of aspects of the ecology of Durban’s sandy beaches has
provided much needed baseline data for this coastline. These data will be used in
conjunction with other available data toward the development of a fine scale
systematic conservation plan for Durban to enable the prioritisation of conservation
and management efforts. The use of these data will also facilitate the development of
guidelines for the integrated ecological management of urban sandy beach
ecosystems. / Thesis (M.Sc.)-University of KwaZulu-Natal, 2009.
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Beachwatch : the effect of daily morphodynamics on seasonal beach evolution /Quartel, Susanne. January 2007 (has links)
Thesis (Ph. D.)--Utrecht University, 2007. / Afterword and vita in both English and Dutch. Includes bibliographical references (p. 115-120).
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Wind and wave forcing of longshore currents across a barred beachWhitford, Dennis James. January 1988 (has links)
Thesis (M.S.)--Naval Postgraduate School, 1988. / Cover title. "June 1988." Includes bibliographical references (p. 194-202).
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Μικροβιολογική και γεωλογική εκτίμηση της ποιότητας ιζημάτων σε δέκα παραλίες του νομού ΑχαΐαςΑθανασοπούλου, Κωνσταντίνα Παρασκευή 11 July 2013 (has links)
Στόχος της εργασίας αυτής είναι η καταγραφή και αξιολόγηση της ποιότητας δέκα παραλιών του νομού Αχαΐας, καθώς και η σύγκριση των μικροβιολογικών και γεωλογικών στοιχείων που διεξάγονται μέσω μηνιαίων επαναλαμβανόμενων δειγματοληψιών και αναλύσεων. Εβδομήντα δείγματα άμμου συλλέχθηκαν μηνιαία, σε χρονικό διάστημα επτά μηνών και ακολούθησαν αναλύσεις όσον αφορά τα εξής βακτήρια: ολικά κολοβακτηριοειδή, e.coli και εντερόκοκκους. Παράλληλα πραγματοποιήθηκαν γεωλογικές αναλύσεις των δειγμάτων, όσον αφορά το μέγεθος των κόκκων, την σφαιρικότητα, την στρογγύλωση καθώς και τον υπολογισμό των στατιστικών τους παραμέτρων. / The aim of this paper is to record and evaluate the quality of ten beaches of Achaia, and to compare the microbiological and geological data held by recurring monthly sampling and analysis. Seventy samples of sand were collected monthly, over a period of seven months, followed by analyzes of the following bacteria: total coliforms, e.coli and enterococci. Furthermore, a geological analysis of the samples for grain size, the sphericity and the calculation of statistical parameters.
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Balanço de sedimentos arenosos da enseada de Balneário Camboriú-SCMenezes, João Thadeu de January 2008 (has links)
O objetivo principal deste estudo é a análise do balanço de sedimentos arenosos na enseada de Balneário Camboriú, localizada no litoral centro-norte do Estado de Santa Catarina. Para alcançar os objetivos deste trabalho a enseada foi compartimentada em células e utilizadas diferentes metodologias que envolveram a análise de diversos parâmetros, tais como: sedimentologia e morfologia da praia e antepraia; estabilidade da praia em planta e perfil; perfil de equilíbrio da enseada; transporte de sedimentos por ondas e correntes e perda de sedimentos para fora da praia através dos banhistas. A praia de Balneário Camboriú é composta de areia fina a muito fina, de composição quartzosa, bem a moderadamente classificados. A distribuição das fácies sedimentares da enseada de Balneário Camboriú demonstra a inexistência de trocas de sedimentos arenosos da praia com a região da antepraia, sendo esta dominada principalmente por sedimentos finos (silte e argila). A estabilidade da praia em planta encontra-se em equilíbrio dinâmico na porção norte e sul da enseada. A morfologia praial em valores de variação de volume e largura demonstrou que os perfis localizados na porção norte, que corresponde a região mais exposta da praia, apresentam maiores variações do que os demais perfis localizados nas porções mais protegidas. Verificou-se um processo de rotação praial entre os perfis, havendo acresção em alguns enquanto ocorre erosão em outros, mostrando uma troca de sedimentos entre eles. O volume de sedimentos ganho pela praia entre 1994 e 2005 foi de aproximadamente 49.000 m3 que foram adicionados artificialmente por uma obra de alimentação executada pela prefeitura municipal. A profundidade de fechamento apresenta um comportamento gradacional, com diminuição dos valores de norte para o sul da enseada, em acordo com os padrões de distribuição do fluxo de energia das ondas e correntes. Os valores definidos para a profundidade de fechamento variam entre 4 m e 1,7 m. Este limite de profundidade é também demonstrado na variação faciológica entre a praia e antepraia. Os cenários de refração, difração de ondas e transporte de sedimentos associado demonstrou que a praia se comporta como uma célula fechada, não havendo troca significativa de sedimentos entre esta e a região de antepraia. Portanto, gerando um balanço arenoso nulo entre estes dois ambientes. Verificou-se, que o volume sedimentar removido da praia pelos banhistas não causou grande impacto no balanço de sedimentos durante o período amostral. Por outro lado, sugere-se que em longo prazo, esta retirada de areia possa representar um déficit mais significativo, da ordem de 970m³. O cálculo do balanço de sedimentos arenosos para a praia e enseada de Balneário Camboriú apresentou um valor negativo de 152 m3/ano. Este valor pode ser considerado mínimo quando comparado ao volume total de sedimentos da praia, e corresponde a metade do valor calculado para a perda anual de sedimentos causadas pelos banhistas Com isso pode-se concluir que a enseada de Balneário Camboriú está em equilíbrio quanto ao balanço sedimentar, sem perdas e ganhos de sedimentos consideráveis. / The overall goal of this study is the sandy sediment budget analysis in the Balneário Camboriú bay, located in central-northern coast of Santa Catarina State. To achieve the objectives of this work the bay was compartments in cells and used different methodologies that involved the analysis of various parameters such as: the beach and bay sedimentology and morphology; planform and profile beach stability; equilibrium beach profile; sediment transport by waves and currents and loss of sediment through the beach users. The Balneário Camboriú beach is composed of the fine and very fine sand, quartz and to moderately classified. The sedimentary facies distribution shows there are no exchanges of sediment from the sandy beach with the bay, dominated mainly by fine-grained sediments (silt and clay). The planform beach stability is in dynamic equilibrium in the north and south beach portion. The beach morphology change in volume and width values showed that the profiles located in the northern portion, more exposed to the beach, have more variations than the other profiles located in portions more protected. There was a process of beach rotation between the profiles, there was accretion in some profiles and erosion in others, showing an exchange of sediment between them. The sediment volume gain the beach between 1994 and 2005 was approximately 49,000 m3 which were artificially added to the beach for nourishment implemented by Municipality. The depth of closure presents a gradational behavior, with declining values of north to the south of the bay, in accordance with the waves and currents flow of energy distribution patterns. The values defined for the depth of closure ranging from 4 m to 1.7 m. This limit of depth is also shown in facies variation between the beach and shoreface. The waves refraction and diffraction scenarios and sediment transport showed that the beach is behaving like a closed cell, with no exchange between beach and shoreface. Therefore, generating a null balance between these two sandy environments. It was found that the sediment volume removed by users beach causes no major impact on the coastal sediment sampling during the period (summer 2003/2004). Moreover, it is suggested that a long-term Balneário Camboriú, the sand removal could present a more significant deficit in the coastal sediment, as this beach is mostly populated flow in twenty years where the sediment volume would be withdrawn from 970m³ . The beach and shoreface Balneário Camboriú sandy sediment balance calculation presented a negative value of 152 m3/year. This quantities can be considered minimal when compared to the total sediment volume from the beach. The estimated value is half the value calculated for the loss of sediment removed by users. This can be concluded that the inlet of Balneário Camboriú bay is totally balanced on the sediment, with no considerable sediment losses and gains.
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Balanço de sedimentos arenosos da enseada de Balneário Camboriú-SCMenezes, João Thadeu de January 2008 (has links)
O objetivo principal deste estudo é a análise do balanço de sedimentos arenosos na enseada de Balneário Camboriú, localizada no litoral centro-norte do Estado de Santa Catarina. Para alcançar os objetivos deste trabalho a enseada foi compartimentada em células e utilizadas diferentes metodologias que envolveram a análise de diversos parâmetros, tais como: sedimentologia e morfologia da praia e antepraia; estabilidade da praia em planta e perfil; perfil de equilíbrio da enseada; transporte de sedimentos por ondas e correntes e perda de sedimentos para fora da praia através dos banhistas. A praia de Balneário Camboriú é composta de areia fina a muito fina, de composição quartzosa, bem a moderadamente classificados. A distribuição das fácies sedimentares da enseada de Balneário Camboriú demonstra a inexistência de trocas de sedimentos arenosos da praia com a região da antepraia, sendo esta dominada principalmente por sedimentos finos (silte e argila). A estabilidade da praia em planta encontra-se em equilíbrio dinâmico na porção norte e sul da enseada. A morfologia praial em valores de variação de volume e largura demonstrou que os perfis localizados na porção norte, que corresponde a região mais exposta da praia, apresentam maiores variações do que os demais perfis localizados nas porções mais protegidas. Verificou-se um processo de rotação praial entre os perfis, havendo acresção em alguns enquanto ocorre erosão em outros, mostrando uma troca de sedimentos entre eles. O volume de sedimentos ganho pela praia entre 1994 e 2005 foi de aproximadamente 49.000 m3 que foram adicionados artificialmente por uma obra de alimentação executada pela prefeitura municipal. A profundidade de fechamento apresenta um comportamento gradacional, com diminuição dos valores de norte para o sul da enseada, em acordo com os padrões de distribuição do fluxo de energia das ondas e correntes. Os valores definidos para a profundidade de fechamento variam entre 4 m e 1,7 m. Este limite de profundidade é também demonstrado na variação faciológica entre a praia e antepraia. Os cenários de refração, difração de ondas e transporte de sedimentos associado demonstrou que a praia se comporta como uma célula fechada, não havendo troca significativa de sedimentos entre esta e a região de antepraia. Portanto, gerando um balanço arenoso nulo entre estes dois ambientes. Verificou-se, que o volume sedimentar removido da praia pelos banhistas não causou grande impacto no balanço de sedimentos durante o período amostral. Por outro lado, sugere-se que em longo prazo, esta retirada de areia possa representar um déficit mais significativo, da ordem de 970m³. O cálculo do balanço de sedimentos arenosos para a praia e enseada de Balneário Camboriú apresentou um valor negativo de 152 m3/ano. Este valor pode ser considerado mínimo quando comparado ao volume total de sedimentos da praia, e corresponde a metade do valor calculado para a perda anual de sedimentos causadas pelos banhistas Com isso pode-se concluir que a enseada de Balneário Camboriú está em equilíbrio quanto ao balanço sedimentar, sem perdas e ganhos de sedimentos consideráveis. / The overall goal of this study is the sandy sediment budget analysis in the Balneário Camboriú bay, located in central-northern coast of Santa Catarina State. To achieve the objectives of this work the bay was compartments in cells and used different methodologies that involved the analysis of various parameters such as: the beach and bay sedimentology and morphology; planform and profile beach stability; equilibrium beach profile; sediment transport by waves and currents and loss of sediment through the beach users. The Balneário Camboriú beach is composed of the fine and very fine sand, quartz and to moderately classified. The sedimentary facies distribution shows there are no exchanges of sediment from the sandy beach with the bay, dominated mainly by fine-grained sediments (silt and clay). The planform beach stability is in dynamic equilibrium in the north and south beach portion. The beach morphology change in volume and width values showed that the profiles located in the northern portion, more exposed to the beach, have more variations than the other profiles located in portions more protected. There was a process of beach rotation between the profiles, there was accretion in some profiles and erosion in others, showing an exchange of sediment between them. The sediment volume gain the beach between 1994 and 2005 was approximately 49,000 m3 which were artificially added to the beach for nourishment implemented by Municipality. The depth of closure presents a gradational behavior, with declining values of north to the south of the bay, in accordance with the waves and currents flow of energy distribution patterns. The values defined for the depth of closure ranging from 4 m to 1.7 m. This limit of depth is also shown in facies variation between the beach and shoreface. The waves refraction and diffraction scenarios and sediment transport showed that the beach is behaving like a closed cell, with no exchange between beach and shoreface. Therefore, generating a null balance between these two sandy environments. It was found that the sediment volume removed by users beach causes no major impact on the coastal sediment sampling during the period (summer 2003/2004). Moreover, it is suggested that a long-term Balneário Camboriú, the sand removal could present a more significant deficit in the coastal sediment, as this beach is mostly populated flow in twenty years where the sediment volume would be withdrawn from 970m³ . The beach and shoreface Balneário Camboriú sandy sediment balance calculation presented a negative value of 152 m3/year. This quantities can be considered minimal when compared to the total sediment volume from the beach. The estimated value is half the value calculated for the loss of sediment removed by users. This can be concluded that the inlet of Balneário Camboriú bay is totally balanced on the sediment, with no considerable sediment losses and gains.
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The Ecology of Surf Zone Fauna of Dissipative Sandy Beaches in Southern Oregon U.S.A.Marin Jarrin, Jose R., 1980- 09 1900 (has links)
xiv, 144 leaves : ill. A print copy of this title is available through the UO Libraries under this call number: SCIENCE QH541.5.S35 M37 2007
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