Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/33526 |
Resumo: | Water erosion is one of the main factors that lead to the process of soil degradation, with impacts ranging from reducing productivity to losses of natural resources. Thus, this work aimed to estimate soil losses performing RUSLE model and to verify the effect of changes in land use changes, from 1990 to 2007, in the watersheds of the rivers Lontra and Manoel Alves Pequeno,Tocantins State-Brazil. Water erosion in the river Lontra ranged from “slight” (51.3%) in the central region of the basin (dominance of flat relief and forest land use), to “extremely high” (24.6%), in the range that goes from the north to the west (dominance of pasture land use and more declining relief). In the watershed of Manoel Alves Pequeno the erosion class “slight” (52%) was distributed along the basin, due to most soils had low erodibility and with most of the area covered by cerrado. While the “extremely high” class (6.7%), occurred in the northern and western part due to pasture land use, and in the eastern part due to the greater slope. Temporal evaluation of soil loss evidenced that there were no significant variations in the period studied. However, in the watershed of river Lontra, from 2000 to 2007, occurred a 0.3% reduction of the “extremely high”; at the wathershed Manoel Alves Pequeno, from 1990 to 2007, there was a gradual increase in the soil erosion rate |
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Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, TocantinsWater erosion modeling in the watersheds of the rivers Lontra and Manoel Alves Pequeno, Tocantins State, BrazilBacia hidrográficaConservação do soloPerdas de soloRevised Universal Soil Loss Equation (RUSLE)Tocantins-AraguaiaWatershedSoil conservationSoil lossWater erosion is one of the main factors that lead to the process of soil degradation, with impacts ranging from reducing productivity to losses of natural resources. Thus, this work aimed to estimate soil losses performing RUSLE model and to verify the effect of changes in land use changes, from 1990 to 2007, in the watersheds of the rivers Lontra and Manoel Alves Pequeno,Tocantins State-Brazil. Water erosion in the river Lontra ranged from “slight” (51.3%) in the central region of the basin (dominance of flat relief and forest land use), to “extremely high” (24.6%), in the range that goes from the north to the west (dominance of pasture land use and more declining relief). In the watershed of Manoel Alves Pequeno the erosion class “slight” (52%) was distributed along the basin, due to most soils had low erodibility and with most of the area covered by cerrado. While the “extremely high” class (6.7%), occurred in the northern and western part due to pasture land use, and in the eastern part due to the greater slope. Temporal evaluation of soil loss evidenced that there were no significant variations in the period studied. However, in the watershed of river Lontra, from 2000 to 2007, occurred a 0.3% reduction of the “extremely high”; at the wathershed Manoel Alves Pequeno, from 1990 to 2007, there was a gradual increase in the soil erosion rateA erosão hídrica é um dos principais fatores que leva ao processo de degradação do solo, com impactos que vão desde a redução da produtividade até a diminuição dos recursos naturais existentes. Assim, objetivou-se estimar as perdas de solo aplicando o modelo RUSLE e verificar o efeito das alterações no uso do solo, de 1990 a 2007, para as bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, TO. A erosão hídrica na bacia do rio Lontra, variou de “suave” (51,3%) na região central da bacia (predomínio de relevo plano e mata), a “extremamente alta” (24,6%) na faixa que vai do norte ao oeste, (predomínio de pastagem e relevo mais declivoso). Na bacia do rio Manoel Alves Pequeno, a classe de erosão “suave” (52%) esteve distribuída ao longo da bacia, devido a maior parte dos solos ser de baixa erodibilidade e pela predominância do cerrado. Entretanto, a classe “extremamente alta” (6,7%) ocorreu nas porções norte e oeste devido ao uso do solo caracterizado por pastagens, e na porção leste devido a maior declividade. A avaliação temporal evidenciou que não houveram variações importantes no período estudado. Na bacia do rio Lontra, de 2000 a 2007, ocorreu uma redução 0,3% na classe “extremamente alta”; já na bacia do rio Manoel Alves Pequeno, de 1990 a 2007, houve aumento gradual da taxa de erosão.Universidade Federal Rural de Pernambuco2019-04-12T13:56:33Z2019-04-12T13:56:33Z2018info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfBARROS, E. N. de S. et al. Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins. Revista Brasileira de Ciências Agrárias, Recife, v. 13, n. 1, 2018.http://repositorio.ufla.br/jspui/handle/1/33526Revista Brasileira de Ciências Agráriasreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessBarros, Enicléia Nunes de SousaViola, Marcelo RibeiroRodrigues, Jéssica Assaid MartinsMello, Carlos Rogério deAvanzi, Junior CesarAlves, Marcos Vinicius Giongopor2019-04-12T13:56:33Zoai:localhost:1/33526Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2019-04-12T13:56:33Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins Water erosion modeling in the watersheds of the rivers Lontra and Manoel Alves Pequeno, Tocantins State, Brazil |
title |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins |
spellingShingle |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins Barros, Enicléia Nunes de Sousa Bacia hidrográfica Conservação do solo Perdas de solo Revised Universal Soil Loss Equation (RUSLE) Tocantins-Araguaia Watershed Soil conservation Soil loss |
title_short |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins |
title_full |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins |
title_fullStr |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins |
title_full_unstemmed |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins |
title_sort |
Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins |
author |
Barros, Enicléia Nunes de Sousa |
author_facet |
Barros, Enicléia Nunes de Sousa Viola, Marcelo Ribeiro Rodrigues, Jéssica Assaid Martins Mello, Carlos Rogério de Avanzi, Junior Cesar Alves, Marcos Vinicius Giongo |
author_role |
author |
author2 |
Viola, Marcelo Ribeiro Rodrigues, Jéssica Assaid Martins Mello, Carlos Rogério de Avanzi, Junior Cesar Alves, Marcos Vinicius Giongo |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Barros, Enicléia Nunes de Sousa Viola, Marcelo Ribeiro Rodrigues, Jéssica Assaid Martins Mello, Carlos Rogério de Avanzi, Junior Cesar Alves, Marcos Vinicius Giongo |
dc.subject.por.fl_str_mv |
Bacia hidrográfica Conservação do solo Perdas de solo Revised Universal Soil Loss Equation (RUSLE) Tocantins-Araguaia Watershed Soil conservation Soil loss |
topic |
Bacia hidrográfica Conservação do solo Perdas de solo Revised Universal Soil Loss Equation (RUSLE) Tocantins-Araguaia Watershed Soil conservation Soil loss |
description |
Water erosion is one of the main factors that lead to the process of soil degradation, with impacts ranging from reducing productivity to losses of natural resources. Thus, this work aimed to estimate soil losses performing RUSLE model and to verify the effect of changes in land use changes, from 1990 to 2007, in the watersheds of the rivers Lontra and Manoel Alves Pequeno,Tocantins State-Brazil. Water erosion in the river Lontra ranged from “slight” (51.3%) in the central region of the basin (dominance of flat relief and forest land use), to “extremely high” (24.6%), in the range that goes from the north to the west (dominance of pasture land use and more declining relief). In the watershed of Manoel Alves Pequeno the erosion class “slight” (52%) was distributed along the basin, due to most soils had low erodibility and with most of the area covered by cerrado. While the “extremely high” class (6.7%), occurred in the northern and western part due to pasture land use, and in the eastern part due to the greater slope. Temporal evaluation of soil loss evidenced that there were no significant variations in the period studied. However, in the watershed of river Lontra, from 2000 to 2007, occurred a 0.3% reduction of the “extremely high”; at the wathershed Manoel Alves Pequeno, from 1990 to 2007, there was a gradual increase in the soil erosion rate |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018 2019-04-12T13:56:33Z 2019-04-12T13:56:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
BARROS, E. N. de S. et al. Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins. Revista Brasileira de Ciências Agrárias, Recife, v. 13, n. 1, 2018. http://repositorio.ufla.br/jspui/handle/1/33526 |
identifier_str_mv |
BARROS, E. N. de S. et al. Modelagem da erosão hídrica nas bacias hidrográficas dos rios Lontra e Manoel Alves Pequeno, Tocantins. Revista Brasileira de Ciências Agrárias, Recife, v. 13, n. 1, 2018. |
url |
http://repositorio.ufla.br/jspui/handle/1/33526 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal Rural de Pernambuco |
publisher.none.fl_str_mv |
Universidade Federal Rural de Pernambuco |
dc.source.none.fl_str_mv |
Revista Brasileira de Ciências Agrárias reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1784549983651889152 |