EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/s1982-21702017000400045 http://hdl.handle.net/11449/157963 |
Resumo: | Abstract: Geomorphometry is the science of quantitative description of land surface morphology by the mean of geomorphic indices extracted from Digital Elevation Models (DEMs). The analysis of these indices is the first and most common procedure performed in several geoscience-related subjects. This study aims to assess the impact of mesh size degradation on different local and regional geomorphic indices extracted for GDEM and TOPODATA DEMs. Thus, these DEMs, having a mesh size of 30 m, were subsampled to 60, 120 and 240 m and then geomorphic indices were calculated using the full resolution DEM and the subsampled ones. Depending on their behavior, these indices are then classified into stable and unstable. The results show that the most affected indices are slope and hydrographic indices such as Strahler order, stream sinuosity and fractal dimension and watershed perimeter, whereas elevation remains stable. It also shows that the effect depends on the presence of the canopy and geological structures in the studied area. |
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EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZILO efeito da dimensão da malha de Modelos Digitais de Elevação sobre os índices geomórficos: O estudo de caso da bacia hidrográfica do rio Ivaí - Estado do Paraná, BrasilGeomorphic indicesDigital Elevation ModelMesh SizeScaleÍndices geomórficosModelo Digital de Elevaçãodimensão da malha, escalaAbstract: Geomorphometry is the science of quantitative description of land surface morphology by the mean of geomorphic indices extracted from Digital Elevation Models (DEMs). The analysis of these indices is the first and most common procedure performed in several geoscience-related subjects. This study aims to assess the impact of mesh size degradation on different local and regional geomorphic indices extracted for GDEM and TOPODATA DEMs. Thus, these DEMs, having a mesh size of 30 m, were subsampled to 60, 120 and 240 m and then geomorphic indices were calculated using the full resolution DEM and the subsampled ones. Depending on their behavior, these indices are then classified into stable and unstable. The results show that the most affected indices are slope and hydrographic indices such as Strahler order, stream sinuosity and fractal dimension and watershed perimeter, whereas elevation remains stable. It also shows that the effect depends on the presence of the canopy and geological structures in the studied area.Resumo: A geomorfometria é a ciência da descrição quantitativa da morfologia da superfície terrestre por meio de índices geomórficos extraídos de Modelos Digitais de Elevação (MDEs). A análise destes índices é um dos primeiros e mais comuns procedimentos executados em estudos relacionados a geociência. Este estudo tem como objetivo avaliar o impacto da degradação da dimensão da malha (mesh size) sobre diferentes índices geomórficos locais e regionais extraídos dos MDEs GDEM e TOPODATA. Estes MDEs, ambos com dimensão original da malha de 30 m, foram reamostrados para 60, 120 e 240 m, sendo em seguida calculados os índices geomórficos, tanto para a dimensão original quanto para as reamostras. Dependendo do seu comportamento, estes índices foram classificados em estáveis e instáveis. Os resultados mostram que os índices mais afetados são a declividade e os índices hidrográficos como a ordem de Strahler, a sinuosidade, a dimensão fractal e o perímetro da bacia, enquanto que a elevação permanece estável. Os resultados também mostram que os efeitos dependem da presença do dossel florestal e das estruturas geológicas na área estudada.Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas Pós-graduação em Geociências e Meio AmbienteLe Mans Université Laboratoire Espaces et SociétésLebanese University Department of Civil Engineering and Department of Geography (GISRS Lab)Université de Toulouse CESBIOUniversidade Estadual Paulista Instituto de Geociências e Ciências Exatas Pós-graduação em Geociências e Meio AmbienteUniversidade Federal do ParanáUniversidade Estadual Paulista (Unesp)Le Mans Université Laboratoire Espaces et SociétésLebanese University Department of Civil Engineering and Department of Geography (GISRS Lab)Université de Toulouse CESBIOSantos, Vanessa Cristina DosHage, Mhamad ElPolidori, LaurentStevaux, José Cândido2018-11-12T17:27:44Z2018-11-12T17:27:44Z2017-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article684-699application/pdfhttp://dx.doi.org/10.1590/s1982-21702017000400045Boletim de Ciências Geodésicas. Universidade Federal do Paraná, v. 23, n. 4, p. 684-699, 2017.1982-2170http://hdl.handle.net/11449/15796310.1590/s1982-21702017000400045S1982-21702017000400684S1982-21702017000400684.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBoletim de Ciências Geodésicasinfo:eu-repo/semantics/openAccess2023-12-11T06:17:34Zoai:repositorio.unesp.br:11449/157963Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-11T06:17:34Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL O efeito da dimensão da malha de Modelos Digitais de Elevação sobre os índices geomórficos: O estudo de caso da bacia hidrográfica do rio Ivaí - Estado do Paraná, Brasil |
title |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL |
spellingShingle |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL Santos, Vanessa Cristina Dos Geomorphic indices Digital Elevation Model Mesh Size Scale Índices geomórficos Modelo Digital de Elevação dimensão da malha, escala |
title_short |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL |
title_full |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL |
title_fullStr |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL |
title_full_unstemmed |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL |
title_sort |
EFFECT OF DIGITAL ELEVATION MODEL MESH SIZE ON GEOMORPHIC INDICES: A CASE STUDY OF THE IVAÍ RIVER WATERSHED - STATE OF PARANÁ, BRAZIL |
author |
Santos, Vanessa Cristina Dos |
author_facet |
Santos, Vanessa Cristina Dos Hage, Mhamad El Polidori, Laurent Stevaux, José Cândido |
author_role |
author |
author2 |
Hage, Mhamad El Polidori, Laurent Stevaux, José Cândido |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Le Mans Université Laboratoire Espaces et Sociétés Lebanese University Department of Civil Engineering and Department of Geography (GISRS Lab) Université de Toulouse CESBIO |
dc.contributor.author.fl_str_mv |
Santos, Vanessa Cristina Dos Hage, Mhamad El Polidori, Laurent Stevaux, José Cândido |
dc.subject.por.fl_str_mv |
Geomorphic indices Digital Elevation Model Mesh Size Scale Índices geomórficos Modelo Digital de Elevação dimensão da malha, escala |
topic |
Geomorphic indices Digital Elevation Model Mesh Size Scale Índices geomórficos Modelo Digital de Elevação dimensão da malha, escala |
description |
Abstract: Geomorphometry is the science of quantitative description of land surface morphology by the mean of geomorphic indices extracted from Digital Elevation Models (DEMs). The analysis of these indices is the first and most common procedure performed in several geoscience-related subjects. This study aims to assess the impact of mesh size degradation on different local and regional geomorphic indices extracted for GDEM and TOPODATA DEMs. Thus, these DEMs, having a mesh size of 30 m, were subsampled to 60, 120 and 240 m and then geomorphic indices were calculated using the full resolution DEM and the subsampled ones. Depending on their behavior, these indices are then classified into stable and unstable. The results show that the most affected indices are slope and hydrographic indices such as Strahler order, stream sinuosity and fractal dimension and watershed perimeter, whereas elevation remains stable. It also shows that the effect depends on the presence of the canopy and geological structures in the studied area. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12-01 2018-11-12T17:27:44Z 2018-11-12T17:27:44Z |
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 |
http://dx.doi.org/10.1590/s1982-21702017000400045 Boletim de Ciências Geodésicas. Universidade Federal do Paraná, v. 23, n. 4, p. 684-699, 2017. 1982-2170 http://hdl.handle.net/11449/157963 10.1590/s1982-21702017000400045 S1982-21702017000400684 S1982-21702017000400684.pdf |
url |
http://dx.doi.org/10.1590/s1982-21702017000400045 http://hdl.handle.net/11449/157963 |
identifier_str_mv |
Boletim de Ciências Geodésicas. Universidade Federal do Paraná, v. 23, n. 4, p. 684-699, 2017. 1982-2170 10.1590/s1982-21702017000400045 S1982-21702017000400684 S1982-21702017000400684.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Boletim de Ciências Geodésicas |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
684-699 application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal do Paraná |
publisher.none.fl_str_mv |
Universidade Federal do Paraná |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803046901749121024 |