Watershed slope length mapping with Geographical Information System

Detalhes bibliográficos
Autor(a) principal: Valeriano, Marcio de Morisson
Data de Publicação: 2008
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta Scientiarum. Agronomy (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2423
Resumo: Procedures for the generation of slope length images by geographical information systems (GIS) are presented. The geoprocessing methods were evaluated through regression analyses of the digital results with a cartographically hand-measured data set, measured in a regular grid of 200m spacing, covering São Joaquim watershed (Pirassununga, SP). Anisotropic cost analysis function of SIG was adapted to model the slope length, by exploring the conceptual similarity and the analogy between its elements and topographic features. The extraction steps of the images from the Digital Elevation Model (DEM), hilltops, slope direction, slope force and unitary distance, as well as the whole developed procedures, were programmed in an internal file of the specific GIS language. Errors in the slope length estimation were shown to prevail in areas of steep relief, with high slope angles and short slopes, which suggest the need of research for the establishment of adequate fit techniques for GIS functions
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spelling Watershed slope length mapping with Geographical Information SystemMapeamento do comprimento de rampa em microbacias com Sistema de Informação GeográficageoprocessamentoMDT/MDEcomprimento de rampamicrobacia5.00.00.00-4 Ciências AgráriasProcedures for the generation of slope length images by geographical information systems (GIS) are presented. The geoprocessing methods were evaluated through regression analyses of the digital results with a cartographically hand-measured data set, measured in a regular grid of 200m spacing, covering São Joaquim watershed (Pirassununga, SP). Anisotropic cost analysis function of SIG was adapted to model the slope length, by exploring the conceptual similarity and the analogy between its elements and topographic features. The extraction steps of the images from the Digital Elevation Model (DEM), hilltops, slope direction, slope force and unitary distance, as well as the whole developed procedures, were programmed in an internal file of the specific GIS language. Errors in the slope length estimation were shown to prevail in areas of steep relief, with high slope angles and short slopes, which suggest the need of research for the establishment of adequate fit techniques for GIS functionsSão apresentados procedimentos para a geração de imagens de comprimento de rampa em microbacias por Sistemas de Informação Geográfica (SIG). Os métodos de geoprocessamento foram avaliados com análises de regressão entre os resultados digitais e um conjunto de dados cartográficos medidos manualmente numa grade regular de 200 m de espaçamento, sobre toda a área da microbacia do córrego São Joaquim (Pirassununga, Estado de São Paulo). A função de análise de custos anisotrópicos do SIG foi adaptada para modelar o comprimento de rampa, explorando-se a semelhança dos conceitos e a analogia entre seus elementos e feições topográficas. Os passos de extração desses elementos do Modelo Digital de Elevação (DEM), divisores, direção de rampa, força de rampa e distância unitária, assim como todos os procedimentos desenvolvidos, foram programados em um arquivo de linguagem específica do SIG usado. A ocorrência de erros nas determinações de comprimento de rampa prevaleceu em áreas de relevo acidentado com declividades altas e rampas curtas, o que indica a necessidade de se estabelecerem procedimentos mais sofisticados de ajuste para os resultados de SIGUniversidade Estadual de Maringá2008-04-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/242310.4025/actasciagron.v24i0.2423Acta Scientiarum. Agronomy; Vol 24 (2002); 1541-1551Acta Scientiarum. Agronomy; v. 24 (2002); 1541-15511807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMValeriano, Marcio de Morissonporinfo:eu-repo/semantics/openAccess2022-11-23T18:37:48Zoai:periodicos.uem.br/ojs:article/2423Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-11-23T18:37:48Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Watershed slope length mapping with Geographical Information System
Mapeamento do comprimento de rampa em microbacias com Sistema de Informação Geográfica
title Watershed slope length mapping with Geographical Information System
spellingShingle Watershed slope length mapping with Geographical Information System
Valeriano, Marcio de Morisson
geoprocessamento
MDT/MDE
comprimento de rampa
microbacia
5.00.00.00-4 Ciências Agrárias
title_short Watershed slope length mapping with Geographical Information System
title_full Watershed slope length mapping with Geographical Information System
title_fullStr Watershed slope length mapping with Geographical Information System
title_full_unstemmed Watershed slope length mapping with Geographical Information System
title_sort Watershed slope length mapping with Geographical Information System
author Valeriano, Marcio de Morisson
author_facet Valeriano, Marcio de Morisson
author_role author
dc.contributor.author.fl_str_mv Valeriano, Marcio de Morisson
dc.subject.por.fl_str_mv geoprocessamento
MDT/MDE
comprimento de rampa
microbacia
5.00.00.00-4 Ciências Agrárias
topic geoprocessamento
MDT/MDE
comprimento de rampa
microbacia
5.00.00.00-4 Ciências Agrárias
description Procedures for the generation of slope length images by geographical information systems (GIS) are presented. The geoprocessing methods were evaluated through regression analyses of the digital results with a cartographically hand-measured data set, measured in a regular grid of 200m spacing, covering São Joaquim watershed (Pirassununga, SP). Anisotropic cost analysis function of SIG was adapted to model the slope length, by exploring the conceptual similarity and the analogy between its elements and topographic features. The extraction steps of the images from the Digital Elevation Model (DEM), hilltops, slope direction, slope force and unitary distance, as well as the whole developed procedures, were programmed in an internal file of the specific GIS language. Errors in the slope length estimation were shown to prevail in areas of steep relief, with high slope angles and short slopes, which suggest the need of research for the establishment of adequate fit techniques for GIS functions
publishDate 2008
dc.date.none.fl_str_mv 2008-04-30
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2423
10.4025/actasciagron.v24i0.2423
url http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2423
identifier_str_mv 10.4025/actasciagron.v24i0.2423
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.publisher.none.fl_str_mv Universidade Estadual de Maringá
publisher.none.fl_str_mv Universidade Estadual de Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Agronomy; Vol 24 (2002); 1541-1551
Acta Scientiarum. Agronomy; v. 24 (2002); 1541-1551
1807-8621
1679-9275
reponame:Acta Scientiarum. Agronomy (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum. Agronomy (Online)
collection Acta Scientiarum. Agronomy (Online)
repository.name.fl_str_mv Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br
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