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Avaliação limnológica das águas do reservatório da UHE Barra dos Coqueiros - Caçu - Go / Limnological evaluation of waters of the reservoir of the hydroelectric plant of the Coconut Bar, Caçu - GONascimento, Elvis Souza 26 August 2014 (has links)
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Previous issue date: 2014-08-26 / The construction of reservoirs causes changes in physical chemistry and structure hidrobio-lógica the aquatic environment , which may cause significant environmental impacts , thus , this study aimed to evaluate the water quality of the Coconut Bar HPP reservoir , located in the Claro river basin , State of Goiás , in two distinct climatic periods of the Cerrado biome . The limnological parameters were evaluated : nitrate, nitrite , phosphorus , total dissolved solids , suspended sediment concentration and turbidity obtained from samples of surface wa-ter collected in forty points distributed within the reservoir tank in the period July 2012 to January 2014 , covering the chu - tem and dry precipitation in the reservoir HPP the Coconut Bar climatic periods . The results obtained from the analyzes of water were discussed and compared based on CONAMA Resolution No. 357, of March 17, 2005, framing classes in freshwaters. The results were assessed for compliance with the limits being scanned points that fall within Classes 1 , 2 and 3 , determined by CONAMA Resolution . Some points pre-sented in class 4. 's Current quality conditions showed good statistical analysis. The most sig-nificant correlations occurred between total dissolved solids (TDS) and concentration of sus-pended solids (CSS) with r = 1 / A construção de reservatórios provoca alterações na estrutura físico-química e hidrobiológica do meio aquático, podendo gerar significativos impactos ambientais, dessa forma, este estudo teve por objetivo avaliar a qualidade da água do reservatório da UHE Barra dos Coqueiros, localizada na bacia do rio Claro, Estado de Goiás, em dois períodos climáticos distintos do bioma Cerrado. Os parâmetros limnológicos avaliados foram: nitrato, nitrito, fósforo, sólidos dissolvidos totais, concentração de sedimentos em suspensão e turbidez, obtidos a partir das amostras de água de superfície, coletadas em quarenta pontos distribuídos dentro do reserva-tório nos período de julho de 2012 a janeiro de 2014, abrangendo os períodos climáticos chu-voso e seco de precipitações no reservatório da UHE Barra dos Coqueiros. Os resultados obti-dos das análises das águas foram discutidos e comparados com base na Resolução CONAMA Nº 357, de 17 de março de 2005, enquadrando nas classes de águas doces. Os resultados fo-ram avaliados quanto à conformidade aos limites, sendo verificados pontos que se enquadram nas Classes 1, 2 e 3, determinados pela Resolução Conama. Alguns pontos apresentaram na classe 4. As condições atuais de qualidade demonstraram boas análises estatísticas. As corre-lações mais significativas ocorreram entre sólidos dissolvidos totais (TDS) e concentração de sólidos suspensos (CSS) com r = 1.
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O clima urbano de Fortaleza sob o nÃvel do campo tÃrmico / The urban climate of Fortaleza in the thermal field levelMarcelo de Oliveira Moura 21 October 2008 (has links)
FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / O objetivo deste trabalho se constitui em caracterizar o clima produzido pela cidade de Fortaleza/CE, sob o nÃvel termodinÃmico do S.C.U. (MONTEIRO, 1976) numa dimensÃo linear tendo como referÃncia doze pontos experimentais representativos da realidade urbana. Para isso, houve a realizaÃÃo de dois experimentos de regimes sazonais diferenciados com registros horÃrios e simultÃneos em perfis de 24 horas (7 Ãs 6 horas). O primeiro experimento realizado no outono austral, perÃodo da quadra chuvosa na regiÃo, nos dias 04 e 05/05/2007 e o segundo na primavera, perÃodo da quadra seca, nos dias 09 e 10/11/2007. Os resultados encontrados seguem o ritmo da habitualidade climÃtica dos episÃdios sazonais analisados, sendo os sistemas de circulaÃÃo atmosfÃrica fatores determinantes no comportamento tÃrmico da cidade. A pesquisa identificou que as ilhas de calor em Fortaleza podem ultrapassar o valor de 5ÂC e ocorrem com maior freqÃÃncia e intensidade no perÃodo diurno entre as 7 e 15 horas. As espacializaÃÃes das ilhas de calor se concentraram nos setores sudoeste, oeste, noroeste e porÃÃo central da cidade. / The objective of the work is constituted in characterizing the climate produced by the city of Fortaleza/CE, under the level thermodynamic of the S.C.U. (MONTEIRO, 1976) in a linear dimension taking as a reference twelve experimental representative points of the urbane reality. For that there was the realization of two experiments in seasonal regimes differentiated with registers time-tables and simultaneous in profiles of 24 hours (7 at 6 hours).The first thing carried out in the southern autumn, period of the rainy block in the region, in the days 04 and 05/05/2007 and according to in the spring, period of the dry block, in the days 09 and 11/10/2007.The considered results follow the rhythm of the climatic of the seasonal analysed episodes, being the systems of atmospheric circulation determinative factors in the thermal behaviour of the city.The inquiry identified that the islands of heat in Fortress can exceed the value of 5ÂC and take place with bigger frequency and intensity in the daytime period between 7 and 15 hours. The specializations of the islands of heat concentrated on the sectors south-west, west, northwest and central portion of the city.
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Analysis integrated system of Lake Maraponga environmentalperspective. / AnÃlise integrada do sistema lacustre da Maraponga na perspectiva socioambientalNataniel Colares Dias 27 October 2010 (has links)
O presente trabalho teve como objetivo analisar os aspectos socioambientais do sistema lacustre da maraponga e a relaÃÃo estabelecida dos moradores e freqÃentadores do bairro com a lagoa, analisando os aspectos geoambientais e socioeconÃmicos relacionados a capacidade do sistema lacustre da maraponga, bem com as alteraÃÃes fÃsico-quÃmica e bacteriolÃgica da lagoa, para tanto foram identificados os agentes emissores de poluentes que comprometem a qualidade da Ãgua. A Lagoa da Maraponga està localizada no setor Sudoeste da cidade de Fortaleza que faz parte do segmento costeiro do Estado do CearÃ, fazendo parte da micro-bacia de Fortaleza, mais precisamente da bacia fluvial do Rio CocÃ. Este trabalho foi desenvolvido sob a abordagem socioambiental desenvolvida por MendonÃa (2002), cujo objeto de estudo à construÃdo a partir da relaÃÃo entre sociedade e natureza, e como o objeto de estudo està inserido na Ãrea urbana utilizou-se o Sistema Ambiental Urbano S.A.U. que à um mÃtodo que comeÃou a ser desenvolvido por MendonÃa (2004), na busca de uma abordagem dos problemas socioambientais urbanos. Sendo este constituÃdo de trÃs subsistemas o natural, o social e o construÃdo, sendo este constituÃdo de um sistema complexo e aberto. Esse mÃtodo està associado aos princÃpios limnolÃgicos uma vez que trata do estudo das Ãguas continentais, alÃm de possuir uma caracterÃstica interdisciplinar. Para a anÃlise dos fatores socioeconÃmicos foram utilizados os dados estatÃsticos do censo do IBGE de 2000 e entrevistas com os freqÃentadores do parque onde està localizada a lagoa Os dados de indicadores da qualidade da Ãgua da lagoa da Maraponga, que foram utilizados, foram coletados junto a SEMAM/PMF, os parÃmetros fÃsico-quÃmico e bacteriolÃgico das amostras utilizaram como determinaÃÃo padrÃo as especificaÃÃes da ResoluÃÃo CONAMA 357/2005. A partir dos dados coletados foi possÃvel constatar os principais impactos socioambientais e inter-relaÃÃo entre sociedade / This study aims to examine the environmental aspects of the lake system and the relationship of Maraponga of residents and visitors to the neighborhood pond, examining aspects related to socio-economic and geo-environmental capacity of the
lake system Maraponga well with the physical and chemical changes Bacteriological and the lagoon, both pair identifying the agents emitters that compromise water quality. Maraponga's Lagoon is located in sout
hwest sector of the city of Fortaleza that is part of
the coastal segment of the state of Ceara at latitude 3 Â 47'20 .58 "S and longitude 38 Â 34'7 .475" W. It is part of the micro-watershed of Fortaleza, specifically the Rio Coco river basin and is conne
cted to other watersheds in the city. This work will be developed under the social environmental approach developed by Mendonca (2002). The object of study of social and environmental geography is constructed from the relationship between society and nature, and as the object of study is inserted in the urban area, we used the Urban Environmental System SAU a method that was first developed by Mendonca (2004), in search of an approach to urban social and environmental problems. This being composed of three
subsystems that natural, social and built, and
the UAA consists of a complex system and open. This method is associated limnological principles as regards the study of inland waters, also has an interdisciplinary character.
For the analysis of socioeconomic factors were used for statistical data from the IBGE census of 2000 and interviews with patrons of the park is located where the pond data quality indicators Maraponga of pond water , which were used were collected from
SEMAM / PMF, the physico-chemicaland bacteriological
samples used to determine the standard specifications of Resolution 357/2005. From the data collected, we determined the major environmental impacts and inter
-
relationship between society nature, which made proposals for better use of that water resource.
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Avaliação ambiental e fisiográfica da bacia hidrográfica do Ribeirão Santo Antônio, com vistas ao abastecimento hídrico da cidade de Iporá (GO) / Environmental and physiographic evaluation of the Ribeirão Santo Antônio basin, with a view to the water supply of the Iporá city, BrazilMoura, Derick Martins Borges de 24 February 2017 (has links)
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Previous issue date: 2017-02-24 / Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEG / The environmental and physiographic assessment of watersheds is of great relevance for planning and management of water resources. Considering this premise, this study had as its scope the hydrographic basin of the Santo Antônio river, which is the only water supply for the city of Iporá (GO), showing the importance of understanding the dynamics of water resources in the referred basin. The study aimed to demonstrate how the physical characteristics, specifically related to the elements of the climate and the factors of land use and vegetation cover, influence the availability of the water resources of the basin. For this, the physiographic and morphometric characterization were made, the evaluation of the average rainfall and in the period of the research, the monitoring of the flow rate of the Santo Antônio river in the years of 2015 and 2016 and the analysis of the abstraction system and water supply of SANEAGO – Saneamento de Goiás S / A. In the work of physiographic characterization, methods of description and mapping were used with the support of the theoretical framework, to better understand the physical aspects of the basin. Field incursions were also carried out, aiming at the validation of cartographic information, as well as the collection of information that was not visualized on maps. Data analysis demonstrates that in the basin there are five different lithological units, five types of soils and land use predominant by pastures. The geological diversity present in the basin contributed to the formation of a raised relief with a high altimetric amplitude, because they are rocks of different ages and different resistance to weathering. In the morphometric analysis, twenty-eight parameters were selected and applied to be analyzed with the purpose of obtaining information on the physical and hydrographic characteristics of the basin under study. For the development of the work, the parameters were acquired through geoprocessing and calculated using specific equations. Data analysis showed that the basin is not prone to flooding, but has a high water runoff capacity, due to the fact that the area is predominantly swift, with an altimetric range of 331 meters and with good dissection. This characteristic of the basin favors the superficial drainage of the water, being harmful in the infiltration and water recharge of the water table. The average rainfall and in the period of the survey provided information on the intrinsic rainfall of the local climate, and the variations that occur during the years, being able to understand the amount of water inflow in the basin, correlating with the river flow data. The work of flow measurements was divided into nine field campaigns for flow measurements over two years. These measurements were initially taken every three months, the first in July / 2015, the second in October / 2015, the third in January / 2016, the fourth in April / 2016, and monthly thereafter until September / 2016. It can be seen in the monitoring period that the month of lowest flow was September / 2016 and the month of greatest flow was January / 2016. In the analysis of the catchment and supply system, analyzes were made in the archives made available by the management of SANEAGO of Iporá and analysis in the process and granting opinion issued by SECIMA. The analyzes show that the catchment system is still satisfactory, but in the last two months of the dry season, September and October, they present irregularities in relation to the granting requirements. The results show that it will be necessary to invest in the catchment system to maintain the Santo Antônio stream flow normalized downstream of the catchment point. / A avaliação ambiental e fisiográfica de bacias hidrográficas é de grande relevância para o planejamento e gestão dos recursos hídricos. Considerando esta premissa, este estudo teve como escopo a bacia hidrográfica do ribeirão Santo Antônio, que é a única fornecedora de água para abastecimento da cidade de Iporá (GO), demonstrando a importância de se compreender a dinâmica dos recursos hídricos na referida bacia. O estudo objetivou demonstrar como as características físicas, especificamente relacionadas aos elementos do clima e aos fatores de uso da terra e cobertura vegetal, influenciam a disponibilidade dos recursos hídricos da bacia. Para isso foram feitas a caracterização fisiográfica e morfométrica, a avaliação da pluviosidade média e no período da pesquisa (2015 e 2016), o monitoramento da vazão do ribeirão Santo Antônio nos anos de 2015 e 2016 e a análise do sistema de captação e abastecimento de água da SANEAGO. No trabalho de caracterização fisiográfica foram utilizados métodos de descrição e mapeamento com o apoio do arcabouço teórico, para entender melhor os aspectos físicos da bacia. Também foram realizadas incursões em campo, visando a validação das informações cartográficas, bem como o levantamento de informações que não foram visualizadas em mapas. A análise dos dados demonstra que na bacia existem cinco unidades litológicas diferentes, cinco tipos de solos e uso da terra predominante por pastagens. A diversidade geológica presente na bacia contribuiu na formação de um relevo movimentado com amplitude altimétrica elevada, por se tratar de rochas com diferentes idades e diferentes resistências ao intemperismo. Na análise morfométrica foram selecionados e aplicados vinte e oito parâmetros para serem analisados com a finalidade de obter informações das características físicas e hidrográficas da bacia em estudo. Para o desenvolvimento do trabalho, os parâmetros foram adquiridos por meio de geoprocessamento e calculados com a utilização de fórmulas específicas. As análises dos dados mostraram que a bacia não é propensa a inundações, mas tem alta capacidade de escoamento superficial de água, devido o relevo da área ser predominantemente movimentado, com amplitude altimétrica de 331 metros e com boa dissecação. Essa característica da bacia propicia o escoamento superficial da água, sendo prejudicial na infiltração e recarga hídrica do lençol freático. A avaliação pluviométrica média e no período da pesquisa, trouxe informações da pluviosidade intrínseca do clima local, e as variações que ocorrem durante os anos, podendo compreender a quantidade de entrada de água na bacia, correlacionando com os dados de vazão do ribeirão. O trabalho de medições de vazão foi dividido em nove campanhas de campo para medições de vazão ao longo de dois anos. As referidas medições ocorreram inicialmente de três em três meses, sendo a primeira em Julho/2015, a segunda em Outubro/2015, a terceira em Janeiro/2016, a quarta em Abril/2016, e, posteriormente, feita mensalmente até Setembro/2016. Pode-se constatar no período de monitoramento, que o mês de menor vazão foi Setembro/2016 e o de maior vazão foi o de Janeiro/2016. Na análise do sistema de captação e abastecimento, foram feitas análises nos arquivos disponibilizados pela gerência da SANEAGO de Iporá e análise no processo e parecer de outorga expedida pela SECIMA. As análises mostram que o sistema de captação ainda está satisfatório, mas nos dois últimos meses do período de estiagem, ou seja, setembro e outubro, apresentam irregularidades perante as exigências da outorga. Os resultados mostram que serão necessários investimentos no do sistema de captação para manter a vazão do ribeirão Santo Antônio normalizada a jusante do ponto de captação.
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Representações cartográficas: 6º ano do ensino fundamental dos Colégios Estaduais Rodrigo Rodrigues da Cunha e Martins Borges de Pires do Rio (GO)Pinheiro, Raphael de Araújo 15 March 2017 (has links)
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Previous issue date: 2017-03-15 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The insertion of the Cartography within the teaching of Geography, is something extremely relevant for the critical formation of the students. Thus, it is sought to understand the insertion proposal, and also what the student's perception of the environment in which he is present. This dissertation is based on a theoretical background focusing on the relevance of Cartography teaching in the school environment, as well as the collection of documentary data from govern of the state public education, such as the National Curriculum Parameters (NCPs), the Reference Curriculum of the State Network of Goiás and Analysis of the Pedagogical Political Projects in this country. Seeking to have a real notion of the students' understanding of the cartographic content that was taught to them and the relation that they make with experienced geographic space, the analysis of the representations of mental maps produced by students of the 6th grade from two state schools of Pires do Rio (GO). As part of the results achieved, it was possible to perceive some of the main collective difficulties expressed in the representations. One part of the research that drew much attention was the analysis of representations produced by students with special educational needs. In this way, it was possible, through the representations, to understand the perception that 6th grade students have of cartographic teaching. / A inserção da Cartografia dentro do ensino de Geografia é algo extremamente relevante para a formação crítica dos alunos. Assim, busca-se compreender a proposta de inserção, e também qual a percepção que o aluno tem do meio em que ele está presente através dos mapas mentais.A presente dissertação consta de um embasamento teórico enfocando a relevância do ensino de Cartografia no âmbito escolar, além de levantamento de dados documentais que regem o ensino público estadual como os Parâmetros Curriculares Nacionais (PCNs), do Currículo de Referência da Rede Estadual de Goiás e análise dos Projetos Políticos Pedagógicos.Buscando ter uma real noção do entendimento que os alunos têm do conteúdo cartográfico que lhes foram ensinados e a relação que fazem com espaço geográfico vivido, foi feita a análise das representações de mapas mentais produzidas por alunos do 6º ano do ensino fundamental de dois colégios estaduais de Pires do Rio (GO).Como parte dos resultados alcançados, foi possível perceber que a maioria dos alunos tem dificuldade em fazer a relação entre os elementos cartográficos e seu cotidiano. Uma parte da pesquisa que chamou muita atenção foi das análises das representações produzidas pelos alunos com Necessidades Educacionais Especiais. Deste modo, foi possível, através das representações feitas, compreender a percepção que os alunos do 6º ano têm do ensino cartográfico.
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Climatologia geográfica e docência escolar nas escolas municipais de Jataí-Go / Climatology geographic and teaching in schools municipal de Jataí-GoCruz, Elisa Regina da 15 March 2017 (has links)
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Previous issue date: 2017-03-15 / The objective of this research was to analyze the theoretical and methodological conceptions
of geographic climatology in Geography teaching with teachers who teach classes in the final
years of elementary school, specifically in the 6th year of the Jataí-GO Municipal Network.
This research sought to highlight the emergence of geographic climatology with the studies of
Monteiro (1971), Sette (2002), Zavattini (2004, 2014), Sant'Anna Neto (2008) and Ferreira
(2012) among others. In education the contributions were added through papers published in
the Brazilian Symposium on Geographic Climatology (SBCGs). It is a research with a
qualitative essence, that privileges a study of action research. As a result of the research it was
identified in the annals of the SBCGs about the geographic climatology in the education, and
the data showed that there has been an advance in the last years, being that the South region
from the creation of the symposium was the first region to publish a work directed to The
teaching of climatology. The Southeast region was the region that from 1996 published in all
the events. However, we highlight the participation of the Central West region that in 2012
was the region that most published and the Northeast also made a great contribution from
2000. The works present researches for the construction of meteorological apparatus, visit the
meteorological station The use of music, film, popular sayings, cloud watching, the use of
satellite imagery and games. The contents of climatology verified in the book presents a
language Clear, except in the content on the seasons of the year. The work encourages
creativity and suggests activities that allow a relationship Local and global and makes use of
cartography Representing the elements Of climate on maps facilitates the reading and
visualization of phenomena. The collection presents possibilities for exploration reflective
that focus the space as a whole with different temporalities, spatialities and discusses the
problems environmental Global that allows that the teacher perform one job at perspective of
climatology geographical. In the definition of climate and time, the book brings a concept
mixed and a climatology traditional and a climatology Geographical And on the knowledge of
climatology geographical in Monteiro All teachers said they did not know. Thus, it was
verified the importance of intervening through an action, Organized with the support of the
book, suggestion resource audiovisual Captain Tormenta and Paco en seasons of the year,
consulted at the site of MEC. This object of learning allowed accomplish na activity
interactive and you decide to navigate. The use of the song the pequi of Marcelo Barra was
suggested to the teachers because it allows to relate the seasons with the reality of the student.
The sequence was pointed out by the teachers as an material excellent, easy to understand.
The contents cited in the book and the resource of Captain Tormenta and Paco in seasons of
the year Brings riddles and multimedia animations that allow the use of the object as a
motivator of learning. / A pesquisa teve como objetivo analisar as concepções teóricas e metodológicas da
climatologia geográfica no ensino de Geografia com os professores que ministram aulas nos
anos finais do ensino fundamental, especificamente no 6º ano da Rede Municipal de Jataí-GO.
Essa investigação buscou elencar o surgimento da climatologia geográfica com os estudos de
Monteiro (1971), Sette (2002), Zavattini (2004, 2014), Sant’Anna Neto (2008), Ferreira
(2012) entre outros. Na educação as contribuições foram acrescentadas por meio de trabalhos
publicados nos Simpósios Brasileiro de Climatologia Geográfica (SBCGs). Trata-se de uma
pesquisa com essência qualitativa, que privilegia um estudo da pesquisa ação. Como resultado
da pesquisa identificou-se nos anais do SBCGs acerca da climatologia geográfica na
educação, e os dados mostraram que houve um avanço no últimos anos, sendo que a região
Sul desde a criação do simpósio foi a primeira região a publicar um trabalho voltado para o
ensino de climatologia. A região Sudeste foi a região que a partir de 1996 publicou em todos
os eventos. No entanto destacamos a participação da região Centro Oeste que em 2012 foi a
região que mais publicou e o Nordeste também obteve um grande contribuição a partir de
2000. Os trabalhos apresentam pesquisas voltadas para a construção de aparelhos
meteorológicos, visita a estação meteorológica, a utilização de música, filme, ditos populares,
observação de nuvens, a utilização de imagens de satélite e jogos. Os conteúdos de
climatologia verificados no livro apresentam uma linguagem clara, exceto no conteúdo sobre
as estações do ano. A obra incentivam a criatividade e sugerem atividades que permitem uma
relação local e global e faz o uso da cartografia representando os elemento do clima em mapas
que facilita a leitura e visualização dos fenômenos. A coleção apresenta possibilidades de
exploração de forma reflexiva que enfoque o espaço como uma totalidade, com diferentes
temporalidades, espacialidades e discute os problemas ambientais globais que permite ao
professor um trabalho nas perspectiva da climatologia geográfica. Na definição de clima e
tempo o livro traz um conceito misto de uma climatologia tradicional e uma climatologia
geográfica e sobre o conhecimento da climatologia geográfica a partir do estudo de Monteiro
todos os professores afirmaram não ter conhecimento. Assim, verificou-se a importância de
intervir por meio de uma ação, organizada com apoio do livro, sugestão de recursos
audiovisual Capitão Tormenta e Paco em estações do ano, consultado no site do MEC. Este
objeto de aprendizagem permitiu realizar uma atividade interativa onde o usuário decide a
navegação. A utilização da música “o pequi de Marcelo Barra” foi sugerida aos professores
pois permite relacionar o tema estações do ano com a realidade do aluno. A sequência foi
apontada pelos professores como um material ótimo, de fácil compreensão. Os conteúdos são
citados no livro e o recurso do Capitão Tormenta e Paco em estações do ano traz charadas e
animações multimídia que permitem a utilização do objeto como motivador da aprendizagem.
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Grau de evolução pedogeoquímica da superfície geomorfológica de Xanxerê (SC) - Planalto das Araucárias / Pedogeochemical evolution degree of the geomorphologic surface oF Xanxerê (SC) - Araucaria PlateauGaspari, Mayara Cristina 30 June 2017 (has links)
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Previous issue date: 2017-06-30 / The presented work aimed to verify the pedogeochemichal evolution degree of
the geomorphologic surface of Xanxerê (SC), placed on the Araucaria plateau.
For such the subsequent steps were followed: fieldwork, to characterize the
representative profile's weathering of the geomorphologic surface of Xanxerê
(SC) and gathering of the macromorphological characteristics of the materials
which compose the superficial coverage. Afterwards, lab analysis were
performed, as follows, particle size analysis, soil and particle density to determine
the total porosity, routine chemical analysis, sulfuric attack, mineralogy in the
sand, silt and clay fraction, the ratios Fed, Feo and Fet measurement, total
chemistry, and lastly, micromorphology. The representative profile weathering of
the surface covering from Xanxerê (SC) presents 10.50m of exposed material in
cutting level and presents the following horizons Ap, AB, Bw and Bt, which
corresponds to the solum, the horizons C1 and C2 which correspond to alloterite,
and the horizons C3, C4, C5, C6 and C7 which correspond to isalterite. From the
routine chemistry attributes, we notice that the profile's weathering shows acid
pH, and base deficiency and CEC implying in kaolinite soil, pointing that the
profile's weathering shows an advanced stage of weathering. Regarding
weathering levels, by sulfuric attack, the Ki and Kr levels show that the profile's
weathering materials are highly weathered, presenting progressed pedogenic
evolution and characteristics matching LATOSSOLO BRUNO Distrófico
nitossólico, alítico character. The sand, silt and clay fraction mineralogic analysis
has shown, in general, primary and secondary minerals derived from volcanic
rocks from the Serra Geral Formation and minerals newly formed by partial
hydrolysis procedures, by mono and bissialisation procedures. It's also seen the
presence of minerals formed in distinct conditions from the current ones, allowing
a primal interpretation as polygenetic soil. The information gathered from the iron
analysis point to the existence of well crystallized minerals and thus confirming
the progressed stage of weathering. The total chemistry analysis shows an
intense leaching of basic cations showing that the profiles weathering is
chemically well developed. Lastly, the micromorphological analysis hasn't shown
any sign of allochthonous aspects, suggesting that the superficial coverage has
an autochthonous origin. Therefore, as of the chemical, physical and mineralogic
attribute analysis of the representative superficial coverage of the
geomorphologic surface of Xanxerê (SC), it's possible that this surface has
evolved from the etchplanation process. / O presente trabalho visou verificar o grau de evolução pedogeoquímica da
superfície geomorfológica de Xanxerê (SC), inserida no Planalto das Araucárias.
Para isso, seguiram-se as seguintes etapas: trabalho em campo, para
caracterização do perfil de alteração representativo da superfície geomorfológica
de Xanxerê (SC) e levantamento das características macromorfológicas dos
materiais que compõem a cobertura superficial. Posteriormente, realizaram-se
análises laboratoriais, sendo elas: análise granulométrica, densidade do solo e
das partículas para determinar a porosidade total, química de rotina, ataque
sulfúrico, mineralogia das frações areia, silte e argila, razõees Fed, Feo and Fet,
química total e, por fim, a micromorfologia. O perfil de alteração representativo
da cobertura superficial de Xanxerê (SC) apresenta cerca de 1050 cm de
material exposto em corte de estrada e apresenta os seguintes horizontes: Ap,
AB, Bw e Bt, correspondentes ao solum, os horizontes C1 e C2, correspondentes
à aloterita e os horizontes C3, C4, C5, C6 e C7, correspondentes à isoalterita. A
partir dos atributos da química de rotina, percebe-se que o perfil de alteração
apresenta pH ácido, com déficit de bases e CTC inferindo solos caulinítos bem
desenvolvidos do ponto de vista pedogeoquímico. Em relação aos índices de
intemperismo pelo ataque sulfúrico, os índices Ki e Kr, demostram que os
materiais do perfil de alteração são altamente intemperizados, apresentando
avançada evolução pedogenética e com características correspondentes a
LATOSSOLO BRUNO Distrófico nitossólico, caráter alítico. A análise
mineralógica das frações areia, silte e argila apresenta, de modo geral, minerais
primários e secundários derivados rochas vulcânicas da Formação Serra Geral
e minerais neoformados por processos da hidrólise parcial, por processos de
mono e bissialitização. Percebe-se também a presença de minerais formados
em condições distintas das atuais, permitindo uma primeira interpretação de solo
poligenético. As informações obtidas a partir da análise do ferro apontam a
presença de minerais bem cristalizados e confirmando o avançado estágio de
intemperismo. A análise da química total mostra intensa lixiviação dos cátions
básicos, sugerindo que o perfil de alteração é bem desenvolvido quimicamente.
Por fim, a análise micromorfológica não apontou indicativo de feições alóctones,
sugerindo que a cobertura superficial seja de origem autóctone. Dessa forma, a
partir da análise dos atributos químicos, físicos e mineralógicos da cobertura
superficial representativa da superfície geomorfológica de Xanxerê (SC), é
possível que essa superfície tenha evoluído a partir do processo de
etchplanação.
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Gênese de cobertura superficial em perfil representativo da superfície geomorfológica de Chapecó – Planalto das Araucárias / Genesis of surface coverage in representative profile of the geomorphological surface of Chapecó - Plant of AraucáriasAlmeida, Bruna Krampe de 28 June 2017 (has links)
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Previous issue date: 2017-06-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The present research aims to recognize the genesis of the surface of the geomorphological
surface VIII - Araucaria Plateau, environment subtropical humid climate. For achieve this
objective, field and laboratory surveys were performed. In the field were identified the
macromorphological properties, such as: color, structure, consistency and texture, as well
as granulometric analysis and chemical - macronutrients, sulfuric attack, chemical
analytical analysis of the ten main oxides by FRX, mineralogy by XRD, total iron content,
free and amorphous. The cover studied located at the apex of gently convex hill presented
9.05 meters of extension being identified the horizons: Ap, Bw1, Bw2, BC, CB, C1, C2.
The physical, macronutrient and sulfuric indicate that it is a Bruno Dystrophic Latosol
that develops from allochthonous material. The values of free Fe, amorphous Fe and total
Fe indicate coverage with advanced stage of weathering, representing characteristics of
lateritic development. The Fed / Fet and (Fed - Feo) / Fet ratios corroborate for
interpretation of whether they are allochthonous materials at the top of the hedge
analyzed. The values of analytical chemistry indicate the geochemical more intense
hydrolysis in depth. The presence of 2: 1 filosilicates - EHE and HEV, in amounts
relatively greater than the minerals of the 1: 1 group and with higher crystallinity in the
Bw2, BC and CB horizons indicates that this material was climatic regime with very
marked periods of dryness, different from the current one. The materials analyzed along
the coverage profile representative of the geomorphological surface of Chapecó indicate
genesis allochthon for the solum sector and autochthonous for the alterite, confirming the
performance of the sculpture processes related to Dynamic Etchplanation for the
Araucárias Plateau. / A presente pesquisa tem como objetivo reconhecer a gênese da cobertura
superficial da superfície geomorfológica VIII – Planalto das Araucárias, ambiente
subtropical úmido. Para atingir esse objetivo, foram realizados levantamentos de campo
e de laboratório. Em campo foram identificadas as propriedades macromorfológicas,
como: cor, estrutura, consistência e textura, bem como coletadas amostras tanto para a
análise granulométrica quanto químicas – macronutrientes, ataque sulfúrico, química
analítica dos 10 principais óxidos por FRX, mineralogia por DRX, teores de ferro total,
livre e amorfo. A cobertura estudada situada no ápice de colina suavemente convexa
apresentou 9,05 metros de extensão sendo identificados os horizontes: Ap, Bw1, Bw2,
BC, CB, C1, C2. As características físicas, dos macronutrientes e do ataque sulfurico
indicam tratar-se de Latossolo Bruno Distroférrico Álico que se desenvolve a partir de
material alóctone. Os valores de Fe livre, Fe amorfo e Fe total indicam cobertura
superficial com estágio avançado de intemperismo, representando materiais com
características iniciais de desenvolvimento laterítico. As razões Fed/Fet e (Fed – Feo)/ Fet
corroboram para interpretação de se tratar de materiais alóctones no topo da cobertura
superficial analisada. Os valores da química analítica indicam domínio geoquímico de
hidrólise mais intenso em profundidade. A Presença de filossilicatos 2:1 – EHE e VHE,
em quantidades relativamente maiores que os minerais do grupo 1:1 e com cristalinidade
maior nos horizontes Bw2, BC e CB, indica que este material foi submetido a regime
climático com períodos muito bem marcados de umedecimento e ressecamento, diferente
do atual. Os materiais analisados ao longo do perfil de cobertura superficial representativa
da superfície geomorfológica de Chapecó indicam gênese alóctone para o setor do solum
e autóctone para a alterita, confirmando a atuação dos processos de esculturação do relevo
relacionados a Etchplanação Dinâmica para o Planalto das Araucárias.
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River temperature behaviour in changing environments: trends, patterns at different spatial and temporal scales and role as a stressorArora, Roshni January 2016 (has links)
River/stream water temperature is one of the master water quality parameters as it controls several key iogeochemical, physical and ecological processes and river ecosystem functioning. Thermal regimes of several rivers have been substantially altered by climate change and other anthropogenic impacts resulting in deleterious impacts on river health. Given its importance, several studies have been conducted to understand the key processes defining water temperature, its controls and drivers of change. Temporal and spatial river temperature changes are a result of complex interactions between climate, hydrology and landscape/basin properties, making it difficult to identify and quantify the effect of individual controls. There is a need to further improve our understanding of the causes of spatiotemporal heterogeneity in river temperatures and the governing processes altering river temperatures. Furthermore, to assess the impacts of changing river temperatures on the river ecosystem, it is crucial to better understand the responses of freshwater biota to simultaneously acting stressors such as changing river temperatures, hydrology and river quality aspects (e.g. dissolved oxygen levels). So far, only a handful of studies have explored the impacts of multiple stressors, including changing river temperature, on river biota and, thus, are not well known. This thesis, thus, analysed the changes in river temperature behaviour at different scales and its effects on freshwater organisms. Firstly, at a regional scale, temporal changes in river temperature within long (25 years) and short time periods (10 years) were quantified and the roles of climatic, hydrological and landscape factors were identified for North German rivers. Secondly, at a reach scale, spatial temperature heterogeneity in a sixth-order lowland river (River Spree) was quantified and the role of landscape factors in inducing such heterogeneity was elucidated. Thirdly, at a site scale, short-term behavioural responses (namely drift) of three benthic invertebrate species to varying levels of water temperature, flow, and dissolved oxygen, and to combinations of those factors were experimentally investigated. Results from this thesis showed that, at a regional scale, the majority of investigated rivers in Germany have undergone significant annual and seasonal warming in the past decades. Air temperature change was found to be the major control of increasing river temperatures and of its temporal variability, with increasing influence for increasing catchment area and lower altitudes (lowland rivers). Strongest river temperature increase was observed in areas with low water availability. Other hydro-climatological variables such as flow, baseflow, NAO, had significant contributions in river temperature variability. Spatial variability in river temperature trend rates was mainly governed by ecoregion, altitude and catchment area via affecting the sensitivity of river temperature to its local climate. At a reach scale as well, air temperature was the major control of the temporal variability in river temperature over a period of nine months within a 200 km lowland river reach. The spatial heterogeneity of river temperature in this reach was most apparent during warm months and was mainly a result of the local landscape settings namely, urban areas and lakes. The influence of urban areas was independent of its distance from the river edge, at least when present within 1 km. Heat advected from upstream reaches determined the base river temperature while climatological controls induced river temperature variations around that base temperature, especially below lakes. Riparian buffers were not found to be effective in substantially moderating river temperature in reaches affected by lake warming due to the dominant advected heat from the upstream lake. Experimental investigation indicated that increasing water temperature had a stronger short-term effect on behavioural responses of benthic invertebrates, than simultaneous changes in flow or dissolved oxygen. Also, increases in water temperature was shown to affect benthic invertebrates more severely if accompanied by concomitant low dissolved oxygen and flow levels, while interactive effects among variables vary much among taxa. These results support findings of other studies that river warming, similar to climate change, might be a global phenomenon. Within Germany, lowland rivers are the most vulnerable to future warming, with reaches affected by urbanization and shallow lentic structures being more vulnerable and, therefore, requiring urgent attention. Furthermore, river biota in lowland rivers is particularly susceptible to short-term increases in river temperature such as heat waves. Plantation of riparian buffers, a widely recognized practice to manage climate change effects, in the headwater reaches can be suggested to mitigate and prevent future warming of lowland rivers in general and also throughout river basins, as river temperature response in lowland catchments is a culmination of local and upstream conditions. However, further river temperature increase in lowland river reaches within or close to urban areas and shallow lentic structures will be more difficult to mitigate only via riparian shading and would require additional measures
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Braided rivers: an exploratory study combining flume experiments and the analysis of remotely-sensed dataGarcia Lugo, Grecia Alejandra January 2015 (has links)
Braided rivers exhibit extremely complex and dynamic morphologies as their multiple channels are constantly re-worked. The research reported in this thesis explored a number of properties of braided river form and dynamics and some controlling factors through three individual but complementary research elements. The first research element was concerned with some of the controls on the transition between single thread and multi-thread channel patterns. Twenty-seven different flume experiments were conducted, supported by fourteen replicates. In these experiments, channel confinement (maximum possible channel width) and formative discharge were varied in a 25 x 2.9 m flume of constant slope (1%) and bed material (D50 = 1mm) with sediment supply constrained to match sediment output. As the maximum potential channel width increased, the channel pattern changed from a single channel with alternate bars, to the formation of mid-channel bars, and finally to a multi-thread braided pattern. Bed elevation frequency distributions showed distinct changes in their median, standard deviation, skewness and kurtosis as channel width and discharge increased, indicating the consequences of confining braided channels and regulating discharge on their bed elevation and morphology. The second and third parts of the research use remotely sensed data sets to explored (i) the degree to which a real river shows similar characteristics to those generated in the flume experiments and (ii) the variety in braiding patterns that are found in association with different boundary conditions of slope, width, discharge, and riparian vegetation. For the second research element, a Lidar survey of a 36 km reach of the lower Tagliamento river, Italy, was investigated. Within this reach, the river shows only small variations in slope and bed material size and is subject to the same flood flows. Analysis focused on thirty-six 1 km sub-reaches and demonstrated clear associations among the median, standard deviation, kurtosis and skewness of the bed and also clear downstream trends. Measures of vegetation cover showed statistically-significant associations with the median, standard deviation, kurtosis and skewness of the bed, particularly when only the 32 truly braided reaches were analysed. The measures of vegetation cover also showed downstream trends that corresponded with the trends in bed morphology. Overall, variations in bed morphology showed similar characteristics to those observed in the laboratory flume, but also they showed correspondence with riparian vegetation cover, indicating a topographic signature of vegetation on the bed morphology. The downstream trends appear to be associated with the changing vigour of the riparian vegetation and possibly variations in river baseflow characteristics associated with varying groundwater levels in the alluvial aquifer. The most mature patches of vegetation within the braid plain of the most downstream part of the 36 km reach appear to occur on remnants of braid plain isolated by river bed incision. The third and final research element considered the morphology of six European braided rivers of different slope, width, discharge and riparian vegetation type. Information extracted from Google Earth and other aerial imagery, and gauged river flow data supported an analysis of changes in braided river characteristics through time, and among the six European river sites. Four traditional planform indices were used to characterise the braiding pattern (Bi – braiding index, Ai and Ai2 –anastomosing indices; Si – main channel sinuosity) were combined with measures of stream power and its component variables (width, Q10, and slope). Robust data for bed material calibre was not available. Statistical analysis of the entire data set revealed a potential influence of riparian vegetation type on the relationship between unit stream power and braid channel width; and a trend of increasing Bi, Ai, Ai2, and Si with decreasing unit stream power. However, a larger and more complete data set is needed to confirm these general trends and to fully explore transitional rivers. This research has illustrated the morphological consequences of confining braided rivers and the dependence of the braiding pattern on stream power. It has also illustrated the role of vegetation in contributing to the morphological complexity of braided rivers and the potential role of riparian vegetation in constraining the relationship between stream power and braided river width.
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