An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data

Detalhes bibliográficos
Autor(a) principal: Pôças, Isabel
Data de Publicação: 2011
Outros Autores: Cunha, Mário, Marçal, André R.S., Pereira, Luís Santos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/4279
Resumo: Available at ScienceDirect
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spelling An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed datalandscape dynamicssemi-natural mountain meadowssupervised classificationagroenvironmental policiesLandsatAvailable at ScienceDirectImage data from Earth Observation Satellites (EOS) were used to analyse mountain landscape changes in Northeast Portugal. Three Landsat images, from April 30th 1979, March 14th 1989 and May 29th 2002 were used. A supervised classification was performed for each image based on the radiometric information and the Normalised Difference Vegetation Index (NDVI). Eleven classes were selected considering the main land cover types in the region. The classification results showed high overall accuracy (above 92.5%) and kappa coefficient (above 0.91). Broadly, the range of dates of the Landsat images used allowed for the differentiation between classes. Nevertheless, some problems occurred in differentiating between classes of forest and shrub vegetation due to similar characteristics and vegetation conditions in some periods of the year, and also due to the effects of topographic shadows associated to mountain areas. Meadows and annual crops were the classes having greater changes from 1979 to 2002: meadows area increased 60% while annual crops decreased 43.5%. The increase in meadows area was likely due to policies supporting agroenvironmental conservation and autochthon bovine livestock production. Differently, the decrease in annual crops was likely due to the loss of economical competitiveness of main annual crops and to the rural population decrease and ageing, which favoured the replacement of arable lands by permanent meadows. These results may help developing policies and measures for sustainable management of traditional mountain rural landscapesElsevierRepositório da Universidade de LisboaPôças, IsabelCunha, MárioMarçal, André R.S.Pereira, Luís Santos2012-04-26T10:00:30Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/4279eng"Landscape and Urban Planning". ISSN 0169-2046. 101 (2011) 253-2610169-2046info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:35:17ZPortal AgregadorONG
dc.title.none.fl_str_mv An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
title An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
spellingShingle An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
Pôças, Isabel
landscape dynamics
semi-natural mountain meadows
supervised classification
agroenvironmental policies
Landsat
title_short An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
title_full An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
title_fullStr An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
title_full_unstemmed An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
title_sort An evaluation of changes in a mountainous rural landscape of Northeast Portugal using remotely sensed data
author Pôças, Isabel
author_facet Pôças, Isabel
Cunha, Mário
Marçal, André R.S.
Pereira, Luís Santos
author_role author
author2 Cunha, Mário
Marçal, André R.S.
Pereira, Luís Santos
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Pôças, Isabel
Cunha, Mário
Marçal, André R.S.
Pereira, Luís Santos
dc.subject.por.fl_str_mv landscape dynamics
semi-natural mountain meadows
supervised classification
agroenvironmental policies
Landsat
topic landscape dynamics
semi-natural mountain meadows
supervised classification
agroenvironmental policies
Landsat
description Available at ScienceDirect
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
2012-04-26T10:00:30Z
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://hdl.handle.net/10400.5/4279
url http://hdl.handle.net/10400.5/4279
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Landscape and Urban Planning". ISSN 0169-2046. 101 (2011) 253-261
0169-2046
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv
repository.mail.fl_str_mv
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