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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Terrain spatial variability effects and photo interpretation for soil survey

Fapohunda, Festus Akinwumi. January 1980 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 73-75).
2

Dinâmica da paisagem na microbacia hidrográfica do rio Mojuí, oeste do estado do Pará

Silva, Hugo Amancio Sales [UNESP] 02 August 2013 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:26:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-08-02Bitstream added on 2014-06-13T20:15:44Z : No. of bitstreams: 1 000755428.pdf: 1772727 bytes, checksum: 25340537986dda5d7885dbce168e3429 (MD5) / Atualmente, as questões conservacionistas têm sido discutidas com grande ênfase pela sociedade em geral, principalmente sobre a paisagem amazônica. Dentro desse contexto está a bacia hidrográfica do rio Mojuí, localizada nos municípios de Santarém e Belterra, no estado do Pará. Esta vem sofrendo constantes explorações dos seus recursos naturais, principalmente devido à conversão de áreas com florestas em áreas agrícolas, principalmente para cultivo da soja. O objetivo deste trabalho foi caracterizar, mapear e quantificar, em escala de semi detalhe, as áreas das classes de cobertura vegetal e uso da terr0a no período de 11 anos, com o uso de imagens LANDSAT, órbita/ pontos 227/62, bandas TM 3, 4 e 5, referentes aos anos de 1999, 2005 e 2010, a dinâmica da paisagem na região. A seleção das imagens foi determinada considerando-se o período climático semelhante, com as mesmas circunstâncias de iluminação e cobertura de nuvens. Os limites da bacia foram estabelecidos pelos divisores topográficos que formam a área que drena para um ponto específico. Baseando-se nos dados obtidos no levantamento de campo e com o suporte da fotointerpretação das cenas dos sensores nos anos estabelecidos pela pesquisa, foi definida uma legenda temática para classificação da vegetação e uso do solo na bacia, sendo identificadas sete formas de coberturas vegetais e uso do solo na área de abrangência da bacia. Foram estabelecidas as seguintes classes de cobertura do solo... / Currently, conservation issues have been discussed with great emphasis by society in general, especially on the Amazon landscape. Within this context is Mojuí River watershed, located in the cities of Santarém and Belterra, in the state of Pará This comes under constant exploration of natural resources, mainly due to conversion of forest areas into agricultural areas, mainly for soybeans cultivation. The aim of this study was to characterize and quantify mapping , semi -scale detail , the areas of vegetation cover classes and land use in the period of 11 years as use of LANDSAT , orbit / points 227/62 , TM bands 3 , 4:05 , for the years 1999 , 2005 and 4 2010 , the landscape dynamics in the region . The selection of images was determined considering the similar climatic period, with the same lighting conditions and cloud cover. The boundaries of the basin were established by dividers that form the topographic area that drains to a specific point. Based on the data obtained in the field survey and with the support of photointerpretation the scenes of the sensors in the years established by research, has defined a thematic caption for vegetation classification and land use in the basin, identified seven forms of vegetation and land use in the catchment area of the basin. We defined the following classes of land cover: Rain Forest , Secondary Succession , Alluvial Rain Forest , Grassland , Degraded Grassland , Agriculture and Water Bodies . During the research it was observed that the Moju river watershed has lost 221.73 km² of natural vegetation cover (dense ombrophilous forest, alluvial dense ombrophilous forest). Until 1999 the dense ombrophilous forest class was the largest present at the watershed, however from 2005 on the agricultural class became the largest at that location, with an increase of approximately 518.11% of the initial research area. When the results were analyzed more ...
3

Dinâmica da paisagem na microbacia hidrográfica do rio Mojuí, oeste do estado do Pará /

Silva, Hugo Amancio Sales, 1988. January 2013 (has links)
Orientador: Sérgio Campos / Banca: Ellen Fitipaldi Brasilio Carrega / Banca: Maria Nazaré Martins Maciel / Resumo: Atualmente, as questões conservacionistas têm sido discutidas com grande ênfase pela sociedade em geral, principalmente sobre a paisagem amazônica. Dentro desse contexto está a bacia hidrográfica do rio Mojuí, localizada nos municípios de Santarém e Belterra, no estado do Pará. Esta vem sofrendo constantes explorações dos seus recursos naturais, principalmente devido à conversão de áreas com florestas em áreas agrícolas, principalmente para cultivo da soja. O objetivo deste trabalho foi caracterizar, mapear e quantificar, em escala de semi detalhe, as áreas das classes de cobertura vegetal e uso da terr0a no período de 11 anos, com o uso de imagens LANDSAT, órbita/ pontos 227/62, bandas TM 3, 4 e 5, referentes aos anos de 1999, 2005 e 2010, a dinâmica da paisagem na região. A seleção das imagens foi determinada considerando-se o período climático semelhante, com as mesmas circunstâncias de iluminação e cobertura de nuvens. Os limites da bacia foram estabelecidos pelos divisores topográficos que formam a área que drena para um ponto específico. Baseando-se nos dados obtidos no levantamento de campo e com o suporte da fotointerpretação das cenas dos sensores nos anos estabelecidos pela pesquisa, foi definida uma legenda temática para classificação da vegetação e uso do solo na bacia, sendo identificadas sete formas de coberturas vegetais e uso do solo na área de abrangência da bacia. Foram estabelecidas as seguintes classes de cobertura do solo ... / Abstract: Currently, conservation issues have been discussed with great emphasis by society in general, especially on the Amazon landscape. Within this context is Mojuí River watershed, located in the cities of Santarém and Belterra, in the state of Pará This comes under constant exploration of natural resources, mainly due to conversion of forest areas into agricultural areas, mainly for soybeans cultivation. The aim of this study was to characterize and quantify mapping , semi -scale detail , the areas of vegetation cover classes and land use in the period of 11 years as use of LANDSAT , orbit / points 227/62 , TM bands 3 , 4:05 , for the years 1999 , 2005 and 4 2010 , the landscape dynamics in the region . The selection of images was determined considering the similar climatic period, with the same lighting conditions and cloud cover. The boundaries of the basin were established by dividers that form the topographic area that drains to a specific point. Based on the data obtained in the field survey and with the support of photointerpretation the scenes of the sensors in the years established by research, has defined a thematic caption for vegetation classification and land use in the basin, identified seven forms of vegetation and land use in the catchment area of the basin. We defined the following classes of land cover: Rain Forest , Secondary Succession , Alluvial Rain Forest , Grassland , Degraded Grassland , Agriculture and Water Bodies . During the research it was observed that the Moju river watershed has lost 221.73 km² of natural vegetation cover (dense ombrophilous forest, alluvial dense ombrophilous forest). Until 1999 the dense ombrophilous forest class was the largest present at the watershed, however from 2005 on the agricultural class became the largest at that location, with an increase of approximately 518.11% of the initial research area. When the results were analyzed more ... / Mestre

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