Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal

Detalhes bibliográficos
Autor(a) principal: Koirala, Saroj
Data de Publicação: 2010
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/2732
Resumo: Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies
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spelling Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, NepalGISLand use changeMountainSoil erosionWatershedsDissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial TechnologiesThe spatial-temporal analysis of changes in land use/land cover between 1988 and 1999 at Begnas Tal Rupa Tal Watershed, covering an area of about 50.94 km² in Kaski District, Nepal, reveals the changing scenario of land use/land cover and their consequent effect on soil erosion. The geo-spatial analysis of database generated from the satellite images, ancillary database and socio-economic information critical/vulnerable areas of land degradation are identified. Visual interpretation technique is carried out for land use/land cover by comparing satellite images of Landsat TM from 1988 to 1999 using GIS tools. Datasets of moderate spatial resolution (Landsat TM) have been processed. The geo-spatial analysis results show an increase in major land use/land cover such as agricultural land, dense mixed forest and settlement whereas there is decrease in barren land and open forest. The main land cover such as open forest and barren land are converted both into agricultural land and settlement. This change in land use indicates that the mountain land use is changing rapidly in the Himalayan region. It has not only disrupted ecological balance of the watershed but also reduced ground water recharge, increased run-off and soil erosion as well. Changing land uses/land covers have accelerated the process of soil erosion, loss of top soil and leaching of nutrients in upstream area on the one hand and sedimentation in lakes, reservoirs and river channels on the other. The rain-fed agriculture is contributing maximum to soil losses. High soil erosion is found in sloppy areas where unscientific farmland management practices are prevailing. Most of woody vegetated lands fall on low soil erosion areas. Information obtained using remote sensing techniques can help decision makers to prepare resource map accurately in less time and cost. For the estimation of soil loss by using Morgan approach, the various factor maps can be generated. The lower soil losses are recorded under forest cover and irrigated agricultural land.Cabral, Pedro da Costa BritoPebesma, EdzerPla Bañón, FilibertoRUNKoirala, Saroj2010-03-11T17:11:30Z2010-03-022010-03-02T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/2732enginfo: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:RCAAP2024-05-22T17:07:07Zoai:run.unl.pt:10362/2732Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-22T17:07:07Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
title Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
spellingShingle Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
Koirala, Saroj
GIS
Land use change
Mountain
Soil erosion
Watersheds
title_short Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
title_full Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
title_fullStr Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
title_full_unstemmed Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
title_sort Land use/ land cover change and its impact on soil erosion process in Begnas Tal Rupa Tal watershed using geospatial tools, Kaski district, Nepal
author Koirala, Saroj
author_facet Koirala, Saroj
author_role author
dc.contributor.none.fl_str_mv Cabral, Pedro da Costa Brito
Pebesma, Edzer
Pla Bañón, Filiberto
RUN
dc.contributor.author.fl_str_mv Koirala, Saroj
dc.subject.por.fl_str_mv GIS
Land use change
Mountain
Soil erosion
Watersheds
topic GIS
Land use change
Mountain
Soil erosion
Watersheds
description Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies
publishDate 2010
dc.date.none.fl_str_mv 2010-03-11T17:11:30Z
2010-03-02
2010-03-02T00:00:00Z
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 http://hdl.handle.net/10362/2732
url http://hdl.handle.net/10362/2732
dc.language.iso.fl_str_mv eng
language eng
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.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 Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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