Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS

Detalhes bibliográficos
Autor(a) principal: Silveira, Greice Vieira
Data de Publicação: 2014
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Manancial - Repositório Digital da UFSM
dARK ID: ark:/26339/00130000007q7
Texto Completo: http://repositorio.ufsm.br/handle/1/9405
Resumo: With a 2,809.61 km² area the Itu River Basin is placed in the western side of Rio Grande do Sul. This region, the so-called Campanha Gaúcha, is traditionally used for livestock as it presents plenty of native grasslands. However major changes have been noticed during the last decades in the area activities such as agriculture and forestry use of the fields instead. Sandy desertification and gully erosion have also taken place due to very friable geological substrates. So this work aims to analyze the spatial and temporal changes of the land use in five micro-basins around Itu River and their relationship with limnological variables. Descriptive analysis of the five micro-basins were performed from the slope, hypsometry, soils and land use. There were selected images captured by the Landsat TM satellite from January months of 1991, 1999 and 2010 in order to: 1) check the cover and land use evolution by using maps; 2) elaborate a synthesis map considering slope, cover and land use. The land use classes were defined as: forest, field, bare soil, agriculture and water. Hypsometry and slope maps were made from SRTM data while the soil types maps was elaborated with the shapefile downloaded from the IBGE website. The fieldwork was carried out in July 2013 in one sampling point per micro-basin. The water variables analyzed were temperature, pH, electrical conductivity, turbidity and total suspended solids (TSS). The bare soil is the kind of land use which stands out most among the micro-basins as it appears with high percentages. The micro-basins 3 and 4 are the ones which present most significant values for this land use class due to the low desertification in the areas where they are located in. The locations closer to the Itu River springs (most slopped areas) lead to the micro-basins 1 and 2 being the only ones which show a rising forest class. The presence or absence of riparian forest surrounding watercourses may have been influencing the temperature change as well as the turbidity and the amount of solids in suspension. For micro-basin 3 the latest can also have been influenced by the presence of sand on the riverbanks. In their turn pH and electrical conductivity are likely to have been affected by the red latosol which is the predominant soil of the region and presents an acid character (the pH is due to the type of soil where water flows through
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spelling Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RSInfluence of the land use in the limnological parameters of the Itu river hydrographic basin - RSMicrobaciasVariáveis limnológicasSensoriamento remotoMudanças no uso e cobertura da terraMicro-basinsLimnological variablesRemote sensingChanges in cover and land useCNPQ::CIENCIAS HUMANAS::GEOGRAFIAWith a 2,809.61 km² area the Itu River Basin is placed in the western side of Rio Grande do Sul. This region, the so-called Campanha Gaúcha, is traditionally used for livestock as it presents plenty of native grasslands. However major changes have been noticed during the last decades in the area activities such as agriculture and forestry use of the fields instead. Sandy desertification and gully erosion have also taken place due to very friable geological substrates. So this work aims to analyze the spatial and temporal changes of the land use in five micro-basins around Itu River and their relationship with limnological variables. Descriptive analysis of the five micro-basins were performed from the slope, hypsometry, soils and land use. There were selected images captured by the Landsat TM satellite from January months of 1991, 1999 and 2010 in order to: 1) check the cover and land use evolution by using maps; 2) elaborate a synthesis map considering slope, cover and land use. The land use classes were defined as: forest, field, bare soil, agriculture and water. Hypsometry and slope maps were made from SRTM data while the soil types maps was elaborated with the shapefile downloaded from the IBGE website. The fieldwork was carried out in July 2013 in one sampling point per micro-basin. The water variables analyzed were temperature, pH, electrical conductivity, turbidity and total suspended solids (TSS). The bare soil is the kind of land use which stands out most among the micro-basins as it appears with high percentages. The micro-basins 3 and 4 are the ones which present most significant values for this land use class due to the low desertification in the areas where they are located in. The locations closer to the Itu River springs (most slopped areas) lead to the micro-basins 1 and 2 being the only ones which show a rising forest class. The presence or absence of riparian forest surrounding watercourses may have been influencing the temperature change as well as the turbidity and the amount of solids in suspension. For micro-basin 3 the latest can also have been influenced by the presence of sand on the riverbanks. In their turn pH and electrical conductivity are likely to have been affected by the red latosol which is the predominant soil of the region and presents an acid character (the pH is due to the type of soil where water flows throughCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorA bacia hidrográfica do Rio Itu está localizada na região oeste do Rio Grande do Sul e possui área de 2.809,61 km². O setor oeste do Estado é caracterizado por áreas de campos nativos, regionalmente, conhecido como Campanha Gaúcha e tradicionalmente utilizado para a criação de gado. Entretanto, nas últimas décadas foram observadas significativas mudanças na dinâmica da região, onde os campos passaram a ser explorados por culturas agrícolas e pela silvicultura. Outra característica importante é o desenvolvimento de processos de arenização e voçorocas associado aos substratos geológicos muito friáveis. Portanto, o objetivo desta pesquisa é analisar as variações espaço-temporais do uso e cobertura da terra em cinco microbacias no rio Itu e sua relação com as variáveis limnológicas. Foram realizadas análises descritivas das cinco microbacias a partir da declividade, hipsometria, solos e uso e cobertura da terra. O período de estudo foi de 1991 até 2010, selecionou-se imagens do satélite Landsat TM do mês de janeiro dos anos de 1991, 1999 e 2010 para analisar: 1) a evolução do uso e cobertura da terra através de mapas; 2) confeccionar um mapa síntese considerando-se a declividade e o uso e cobertura da terra. As classes de uso foram assim definidas: floresta, campo, solo exposto, agricultura e água. Os mapas de hipsometria e declividade foram realizados a partir das curvas de nível e dados do radar SRTM, gerando o MNT e após foi realizado o fatiamento das classes. O mapa dos tipos de solos foi baixado o shapefile do site do IBGE e realizado o recorte por microbacia. O trabalho de campo foi realizado em julho de 2013, em total de cinco pontos amostrais, cada um a uma microbacia, as variáveis da água analisadas foram temperatura, pH, condutividade elétrica, turbidez e total de sólidos em suspensão. O tipo de uso da terra que mais se destaca entre as cinco microbacias é o solo exposto que aparece sempre com percentuais altos, sendo que as microbacias 3 e 4 apresentam os valores mais expressivos por estarem inseridas em uma área com processo de arenização. As microbacias 1, 2 e 3 apresentaram a classe floresta em crescimento. A presença e ou a ausência de mata ciliar no entorno dos cursos d água pode estar influenciando na variação de temperatura, no total de sólidos em suspensão e na turbidez. A presença dos areais próximos as margens do rio podem estar influenciando no total de sólidos em suspensão, neste caso na microbacia 3, a qual apresentou o valor mais elevado. O pH e a condutividade elétrica podem estar sendo influenciados pelo tipo de solo predominante da região, o Latossolo vermelho, que apresenta um caráter acido, pois o pH reflete o tipo de solo por onde a água percorre.Universidade Federal de Santa MariaBRGeografiaUFSMPrograma de Pós-Graduação em GeografiaPereira Filho, Waterloohttp://lattes.cnpq.br/0357112879415627Weber, Liane de Souzahttp://lattes.cnpq.br/2891799660226360Galo, Maria de Lourdes Bueno Trindadehttp://lattes.cnpq.br/0894715226925471Silveira, Greice Vieira2014-11-242014-11-242014-03-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfSILVEIRA, Greice Vieira. INFLUENCE OF THE LAND USE IN THE LIMNOLOGICAL PARAMETERS OF THE ITU RIVER HYDROGRAPHIC BASIN RS. 2014. 92 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Santa Maria, Santa Maria, 2014.http://repositorio.ufsm.br/handle/1/9405ark:/26339/00130000007q7porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-09-01T15:06:34Zoai:repositorio.ufsm.br:1/9405Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2024-07-29T10:20:11.498702Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
Influence of the land use in the limnological parameters of the Itu river hydrographic basin - RS
title Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
spellingShingle Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
Silveira, Greice Vieira
Microbacias
Variáveis limnológicas
Sensoriamento remoto
Mudanças no uso e cobertura da terra
Micro-basins
Limnological variables
Remote sensing
Changes in cover and land use
CNPQ::CIENCIAS HUMANAS::GEOGRAFIA
title_short Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
title_full Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
title_fullStr Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
title_full_unstemmed Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
title_sort Influência do uso da terra nos parâmetros limnológicos da bacia hidrográfica do rio Itu - RS
author Silveira, Greice Vieira
author_facet Silveira, Greice Vieira
author_role author
dc.contributor.none.fl_str_mv Pereira Filho, Waterloo
http://lattes.cnpq.br/0357112879415627
Weber, Liane de Souza
http://lattes.cnpq.br/2891799660226360
Galo, Maria de Lourdes Bueno Trindade
http://lattes.cnpq.br/0894715226925471
dc.contributor.author.fl_str_mv Silveira, Greice Vieira
dc.subject.por.fl_str_mv Microbacias
Variáveis limnológicas
Sensoriamento remoto
Mudanças no uso e cobertura da terra
Micro-basins
Limnological variables
Remote sensing
Changes in cover and land use
CNPQ::CIENCIAS HUMANAS::GEOGRAFIA
topic Microbacias
Variáveis limnológicas
Sensoriamento remoto
Mudanças no uso e cobertura da terra
Micro-basins
Limnological variables
Remote sensing
Changes in cover and land use
CNPQ::CIENCIAS HUMANAS::GEOGRAFIA
description With a 2,809.61 km² area the Itu River Basin is placed in the western side of Rio Grande do Sul. This region, the so-called Campanha Gaúcha, is traditionally used for livestock as it presents plenty of native grasslands. However major changes have been noticed during the last decades in the area activities such as agriculture and forestry use of the fields instead. Sandy desertification and gully erosion have also taken place due to very friable geological substrates. So this work aims to analyze the spatial and temporal changes of the land use in five micro-basins around Itu River and their relationship with limnological variables. Descriptive analysis of the five micro-basins were performed from the slope, hypsometry, soils and land use. There were selected images captured by the Landsat TM satellite from January months of 1991, 1999 and 2010 in order to: 1) check the cover and land use evolution by using maps; 2) elaborate a synthesis map considering slope, cover and land use. The land use classes were defined as: forest, field, bare soil, agriculture and water. Hypsometry and slope maps were made from SRTM data while the soil types maps was elaborated with the shapefile downloaded from the IBGE website. The fieldwork was carried out in July 2013 in one sampling point per micro-basin. The water variables analyzed were temperature, pH, electrical conductivity, turbidity and total suspended solids (TSS). The bare soil is the kind of land use which stands out most among the micro-basins as it appears with high percentages. The micro-basins 3 and 4 are the ones which present most significant values for this land use class due to the low desertification in the areas where they are located in. The locations closer to the Itu River springs (most slopped areas) lead to the micro-basins 1 and 2 being the only ones which show a rising forest class. The presence or absence of riparian forest surrounding watercourses may have been influencing the temperature change as well as the turbidity and the amount of solids in suspension. For micro-basin 3 the latest can also have been influenced by the presence of sand on the riverbanks. In their turn pH and electrical conductivity are likely to have been affected by the red latosol which is the predominant soil of the region and presents an acid character (the pH is due to the type of soil where water flows through
publishDate 2014
dc.date.none.fl_str_mv 2014-11-24
2014-11-24
2014-03-28
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv SILVEIRA, Greice Vieira. INFLUENCE OF THE LAND USE IN THE LIMNOLOGICAL PARAMETERS OF THE ITU RIVER HYDROGRAPHIC BASIN RS. 2014. 92 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Santa Maria, Santa Maria, 2014.
http://repositorio.ufsm.br/handle/1/9405
dc.identifier.dark.fl_str_mv ark:/26339/00130000007q7
identifier_str_mv SILVEIRA, Greice Vieira. INFLUENCE OF THE LAND USE IN THE LIMNOLOGICAL PARAMETERS OF THE ITU RIVER HYDROGRAPHIC BASIN RS. 2014. 92 f. Dissertação (Mestrado em Geociências) - Universidade Federal de Santa Maria, Santa Maria, 2014.
ark:/26339/00130000007q7
url http://repositorio.ufsm.br/handle/1/9405
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Geografia
UFSM
Programa de Pós-Graduação em Geografia
publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Geografia
UFSM
Programa de Pós-Graduação em Geografia
dc.source.none.fl_str_mv reponame:Manancial - Repositório Digital da UFSM
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Manancial - Repositório Digital da UFSM
collection Manancial - Repositório Digital da UFSM
repository.name.fl_str_mv Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv atendimento.sib@ufsm.br||tedebc@gmail.com
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