Forest Roads
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Mapping of permanent preservation areas de and land use conflict in rural properties / Mapeamento de áreas de preservação permanente e dos conflitos de uso da terra em propriedades rurais
This work had the following objectives: to elaborate a map of basin land use by properties based on Ikonos II ortho image; to automatically delimit the permanent preservation areas; to evaluate the dynamics of the fragmentation process; and to identify the occurrence of land use conflict by properties on the São Bartolomeu stream basin, located at the Zona
Publicado em: 2009
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14. Hybrid heuristic strategies for planning and scheduling forest harvest and transportation activities in short term / Estrategias hibridas para um problema de planejamento e escalonamento de atividades florestais em curto prazo
This thesis aimed at studying and solving a planning and scheduling problem stemming from forest harvest and wood transportation activities. Our approach treated a real problem faced by large pulp and paper companies in Brazil. It consists in planning, for a short-term horizon, the harvesting operations in different forest areas and the transportation of the
Publicado em: 2008
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15. AcurÃcia e precisÃo do mapeamento da flora nativa e dos reflorestamento em Minas Gerais / Accuracy and precision of the thematic mapping of native flora and reforestation of Minas Gerais
This study aimed to evaluate the overall accuracy and precision of thematic maps. Specifically aimed to evaluate the accuracy and precision of the classification of Thematic Mapping of Native Flora and Forestry of Minas Gerais. Data were collected from the field around the reference state, using simple random sampling procedure in proportion with the support
Publicado em: 2008
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16. BARRAMENTOS NATURAIS NO VALE DO RIO PERUAÃU: CONSEQÃÃNCIAS ECOLÃGICAS E AMBIENTAIS DE EVENTOS PRETÃRITOS E FUTUROS. / Natural barring in the PeruaÃu River Valley: ecological and environmental consequences of past and future events.
Fossil assemblage found in caves record important environmental information concerning the recent past of the surrounding area. In the karstic canyon of the PeruaÃu River, Cavernas do PeruaÃu National Park, Minas Gerais - Brazil, organic deposits suggests the occurrence of major floods resulting from natural barring in the river bed. This dissertation soug
Publicado em: 2008
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17. Um sistema de planejamento e gestão para bacias hidrográficas com uso de análise multicritérios / A system for planning and management of watersheds with the use of multicriteria evaluation
The increasing worldwide development, mainly due to the developing countries, makes a significant pressure on the environment. Several regions are now showing a loss of sustainability. The responsible use of the natural resources involves an equation which considers the sustainable development. This field of knowledge is very wide and involves a great number
Publicado em: 2008
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18. The effect of the regrading of forest roads in the production of sediments / O efeito do nivelamento de estradas florestais na produção de sedimentos
A manutenção das estradas florestais pode afetar diretamente os processos erosivos. Assim, o presente trabalho teve por objetivo conhecer a influência da atividade de nivelamento, utilizando a motoniveladora, na produção de sedimentos pelas estradas florestais. Para tanto, três estradas (1, 2 e 3) foram submetidas ao nivelamento e outras três estradas
Publicado em: 2007
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19. Pteridófitas da caatinga : lista anotada, análise da composição florística e padrões de distribuição geográfica.
This work represents the first comprehensive contribution to the knowledge of the pteridophyte flora of Caatinga vegetation (semi-arid region in northeastern Brazil and northern of Minas Gerais State). With the purpose to collecties and observies the species, localities along nine thousand kilometers of roads were visited. Samples deposited in regional herba
Publicado em: 2007
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20. Diagnosis of the forest crop and wood transportation in fomented rural properties in the State of Espírito Santo / Diagnóstico da colheita e transporte florestal em propriedades rurais fomentadas no Estado do Espírito Santo
This study was developed with information obtained from interviews with 71 farm owners fomented by Aracruz Celulose, in the State of Espírito Santo. The main objective of this study was to diagnose the forest crop and wood transportation in their farms, considering technical, economic, social and environmental aspects. Those farm owners were responsible for
Publicado em: 2006
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21. Forest roads: geotechnical characterization and mechanical behavior of soils and soil-grits, loads of traffic and their effects / Estradas florestais: caracterização geotécnica e comportamento mecânico de solos e misturas solo-grits, cargas de tráfego e seus efeitos
A crescente mecanização e o aumento da produção da indústria florestal têm exigido veículos mais rápidos e mais especializados mecanicamente para se adaptarem às condições topográficas do local e para atender ás exigências do setor de engenharia florestal com relação ao transporte de madeira. O uso de veículos extra pesados no transporte de
Publicado em: 2006
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22. Definição de áreas prioritárias para conservação e preservação florestal por meio da abordagem multicriterial em ambiente SIG. / Definition of priority areas for forest conservation and preservation using multicriterial evaluation with GIS.
The forest fragmentation of the Corumbataí River Basin, SP (Brazil) is a consequence an unplanned process of soil occupation and use. The purpose of this study was to define priority areas for forest conservation and preservation in that river basin, aiming at improve the regional biodiversity. Multicriteria evaluation with Ordered Weighted Average was used
Publicado em: 2005
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23. Estudo floristico e fitossociologico de um gradiente altitudinal no planalto residual do Urucum - Mato Grosso do Sul - Brasil
This is a structural and floristic study of an altitudinal gradient on the Urucum plateau, Mato Grosso do Sul, Brazil. This study is divided into three chapters: The first deals with floristic, structural and diversity variations in trees and shrubs and their relationships with the environmental features associated with altitude; the second deals with the va
Publicado em: 2005
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24. A lagrangian relaxation approach for a machinery location problem in forest harvesting
The correct location of harvesting machinery is an important problem for the timber industry, as these are expensive pieces of equipment. Also, access roads need to be constructed within a season of harvesting. In this paper, we present the modelling of this problem as a mixed integer linear model which, without any special technique, is very difficult to so
Pesquisa Operacional. Publicado em: 2003-01