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dc.contributor.authorFontana, Carolina Rodrigues-
dc.contributor.authorDe Paula Lima, Walter-
dc.contributor.authorDe Barros Ferraz, Silvio Frosini-
dc.identifier.citationScientia Forestalis/Forest Sciences, n. 76, p. 103-109, 2007.-
dc.description.abstractThe forest roads construction inevitably causes environmental impacts to adjacent ecosystems and streams. Also the routine activities of roads maintenance may similarly cause environmental impacts of about the same magnitude. The material scraped from the roadway by the motor grader is usually distributed along the roadsides, from where it may easily be washed out toward the streams. Therefore, quantifying the amount of sediments removed during road maintenance activities may provide important information of this stream sedimentation potential. For this purpose, three forest roads were divided in 30 m long segments, marked with leveled stakes. A nylon thread was then stretched across the leveled stakes and the distance from the nylon thread to the road surface was measured before and after the mechanical scraping of the road. The average removal of sediments was of 2,13 cm. Considering the mean density of soil 1,6 g cm -3, the average removal of sediments was of 341 t ha -1 of road. Considering still a 3,9 m wide and 150 m long road as an example, the total amount of removed sediments would be around 19,9 t. Road maintenance, therefore, must be well planned in order to avoid or minimize stream sedimentation.en
dc.subjectForest roads-
dc.subjectRemoved sediments-
dc.subjectBefore and after-
dc.subjectMean density-
dc.subjectMechanical scraping-
dc.subjectNylon thread-
dc.subjectRoad maintenance-
dc.subjectRoad surfaces-
dc.subjectEnvironmental impact-
dc.subjectRoads and streets-
dc.titleAvaliação da remoção de sedimentos pela operação de nivelamento de estradas florestaispt
dc.title.alternativeEvaluation of the amount of sediment removed by the regrading operation in forests roadsen
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationDepartamento de Ciências Florestais Escola Superior de Agricultura Luiz de Queiroz Universidade de São Paulo, Caixa Postal 9, Piracicaba, SP - 13400-970-
dc.description.affiliationDepartamento de Ecologia Instituto de Biociências Universidade Estadual Paulista, Avenida 24A, 1515 - Rio Claro, SP - 13506-900-
dc.description.affiliationUnespDepartamento de Ecologia Instituto de Biociências Universidade Estadual Paulista, Avenida 24A, 1515 - Rio Claro, SP - 13506-900-
dc.rights.accessRightsAcesso aberto-
dc.relation.ispartofScientia Forestalis/Forest Sciences-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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