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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
21/06/2022 |
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Data da última atualização: |
21/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, U. S. da C.; RUSCHEL, A. R.; REIS, I. M. S. |
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Afiliação: |
ULISSES SIDNEI DA CONCEIÇÃO SILVA, UFRA / UFOPA; ADEMIR ROBERTO RUSCHEL, CPATU; IOLANDA MARIA SOARES REIS, UFOPA. |
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Título: |
Factors influencing directional tree felling in the Tapajós National Forest, Amazon, Brazil. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v. 14, n. 7, p. 83-105, 2022. |
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DOI: |
https://doi.org/10.5539/jas.v14n7p83 |
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Idioma: |
Inglês |
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Conteúdo: |
Given its complexity, directional felling is considered one of the most dangerous activities in the exploratory phase of forest management projects for timber obtention. Therefore, detailed studies of the variables influencing its execution are necessary. The present research was conducted in the Tapajós National Forest, Brazilian Amazon, and analyzed 1,075 trees logged using the directional felling technique in a 504.30 ha area. To better understand directional felling, the studied variables were subjected to descriptive analyses and principal component analysis, a multivariate procedure that enables the simultaneous evaluation of several variables. While the diameter, basal area, and stem and branch volume explained most of the variability concerning directional felling, the commercial height influenced the least. Trees of the species Hymenolobium petraeum (angelim pedra) strongly correlated with the dendrometric variables diameter and stem and branch volume. Those of the species Hymenaea courbaril (jatobá) showed a strong correlation with the commercial height. Pseudopiptadenia psilostachya (fava timborana), Dipteryx odorata (cumaru), Hymenaea parvifolia (jutai mirim), and Astronium lecointei (muiracatiara) had a strong correlation with the basic wood density. Trees of the species Couratari guianensis (tauari), Lecythis pisonis (sapucaia), Astronium lecointei (muiracatiara), Mezilaurus itauba (itaúba), and Goupia glabra (cupiúba) showed lower correlations with the time needed for planning, cutting, and felling. They also had a reduced correlation with the angular differences between the natural and effective and the intended and effective felling directions. The latter results suggest that these species do not follow a defined pattern concerning the directional felling technique. However, trees of the other species followed a different tendency. In general, the logged trees lacked correlation with the directional felling cutting and total operation time. The analyses suggest that as the diameter of a tree increases, the chances of completing its directional felling decrease. MenosGiven its complexity, directional felling is considered one of the most dangerous activities in the exploratory phase of forest management projects for timber obtention. Therefore, detailed studies of the variables influencing its execution are necessary. The present research was conducted in the Tapajós National Forest, Brazilian Amazon, and analyzed 1,075 trees logged using the directional felling technique in a 504.30 ha area. To better understand directional felling, the studied variables were subjected to descriptive analyses and principal component analysis, a multivariate procedure that enables the simultaneous evaluation of several variables. While the diameter, basal area, and stem and branch volume explained most of the variability concerning directional felling, the commercial height influenced the least. Trees of the species Hymenolobium petraeum (angelim pedra) strongly correlated with the dendrometric variables diameter and stem and branch volume. Those of the species Hymenaea courbaril (jatobá) showed a strong correlation with the commercial height. Pseudopiptadenia psilostachya (fava timborana), Dipteryx odorata (cumaru), Hymenaea parvifolia (jutai mirim), and Astronium lecointei (muiracatiara) had a strong correlation with the basic wood density. Trees of the species Couratari guianensis (tauari), Lecythis pisonis (sapucaia), Astronium lecointei (muiracatiara), Mezilaurus itauba (itaúba), and Goupia glabra (cupiúba) showed lower correlations with the time ne... Mostrar Tudo |
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Palavras-Chave: |
Chainsaw operator; Dendrometric variables; Directional felling; Natural fall; Reduced impact logging. |
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Thesagro: |
Árvore; Árvore Florestal; Corte; Extração da Madeira. |
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Thesaurus Nal: |
Principal component analysis. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1144185/1/FactorsInfluencingDirectional.pdf
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Marc: |
LEADER 02985naa a2200277 a 4500
001 2144185
005 2022-06-21
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.5539/jas.v14n7p83$2DOI
100 1 $aSILVA, U. S. da C.
245 $aFactors influencing directional tree felling in the Tapajós National Forest, Amazon, Brazil.$h[electronic resource]
260 $c2022
520 $aGiven its complexity, directional felling is considered one of the most dangerous activities in the exploratory phase of forest management projects for timber obtention. Therefore, detailed studies of the variables influencing its execution are necessary. The present research was conducted in the Tapajós National Forest, Brazilian Amazon, and analyzed 1,075 trees logged using the directional felling technique in a 504.30 ha area. To better understand directional felling, the studied variables were subjected to descriptive analyses and principal component analysis, a multivariate procedure that enables the simultaneous evaluation of several variables. While the diameter, basal area, and stem and branch volume explained most of the variability concerning directional felling, the commercial height influenced the least. Trees of the species Hymenolobium petraeum (angelim pedra) strongly correlated with the dendrometric variables diameter and stem and branch volume. Those of the species Hymenaea courbaril (jatobá) showed a strong correlation with the commercial height. Pseudopiptadenia psilostachya (fava timborana), Dipteryx odorata (cumaru), Hymenaea parvifolia (jutai mirim), and Astronium lecointei (muiracatiara) had a strong correlation with the basic wood density. Trees of the species Couratari guianensis (tauari), Lecythis pisonis (sapucaia), Astronium lecointei (muiracatiara), Mezilaurus itauba (itaúba), and Goupia glabra (cupiúba) showed lower correlations with the time needed for planning, cutting, and felling. They also had a reduced correlation with the angular differences between the natural and effective and the intended and effective felling directions. The latter results suggest that these species do not follow a defined pattern concerning the directional felling technique. However, trees of the other species followed a different tendency. In general, the logged trees lacked correlation with the directional felling cutting and total operation time. The analyses suggest that as the diameter of a tree increases, the chances of completing its directional felling decrease.
650 $aPrincipal component analysis
650 $aÁrvore
650 $aÁrvore Florestal
650 $aCorte
650 $aExtração da Madeira
653 $aChainsaw operator
653 $aDendrometric variables
653 $aDirectional felling
653 $aNatural fall
653 $aReduced impact logging
700 1 $aRUSCHEL, A. R.
700 1 $aREIS, I. M. S.
773 $tJournal of Agricultural Science$gv. 14, n. 7, p. 83-105, 2022.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Tipo/Formato |
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Registro |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
05/11/2019 |
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Data da última atualização: |
24/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
COSTA, A. M. da; SALIS, H. H. C. de; VIANA, J. H. M.; PACHECO, F. A. L. |
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Afiliação: |
Adriana Monteiro da Costa, UFMG; Hugo Henrique Cardoso de Salis, UFMG; JOAO HERBERT MOREIRA VIANA, CNPMS; Fernando António Leal Pacheco, University of Trás-os-Montes and Alto Douro. |
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Título: |
Groundwater recharge potential for sustainable water use in urban areas of the Jequitiba River basin, Brazil. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Sustainability, v. 11, n. 10, article 2955, 2019. |
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DOI: |
10.3390/su11102955 |
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Idioma: |
Inglês |
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Conteúdo: |
The zoning of groundwater recharge potential would be attractive for water managers, but is lacking in many regions around the planet, including in the Jequitiba River basin, Minas Gerais, Brazil. In this study, a physically based spatially distributed method to evaluate groundwater recharge potential at catchment scale was developed and tested in the aforementioned Jequitiba River basin. The data for the test was compiled from institutional sources and implemented in a Geographic Information System. It comprised meteorological, hydrometric, relief, land use, and soil data. The average results resembled the annual recharge calculated by a hydrograph method, which worked as validation method. The spatial variation of recharge highlighted the predominant contribution of flat areas, porous aquifers, and forested regions to groundwater recharge. They also exposedthenegativeeffectofurbanization. Incombination,thesefactorselectedthefollowingsectors of the Jequitiba River basin as regions of high recharge potential: the south-southeast part of the headwaters in Prudente de Morais; Sete Lagoas towards the central part of the basin; and the region between Funilândia and Jequitiba, near the Jequitiba river mouth. Some management practices were suggested to improve groundwater recharge. The map of groundwater recharge potential produced in this study is valuable and is therefore proposed as tool for planners in the sustainable use of groundwater and protection of recharge areas. MenosThe zoning of groundwater recharge potential would be attractive for water managers, but is lacking in many regions around the planet, including in the Jequitiba River basin, Minas Gerais, Brazil. In this study, a physically based spatially distributed method to evaluate groundwater recharge potential at catchment scale was developed and tested in the aforementioned Jequitiba River basin. The data for the test was compiled from institutional sources and implemented in a Geographic Information System. It comprised meteorological, hydrometric, relief, land use, and soil data. The average results resembled the annual recharge calculated by a hydrograph method, which worked as validation method. The spatial variation of recharge highlighted the predominant contribution of flat areas, porous aquifers, and forested regions to groundwater recharge. They also exposedthenegativeeffectofurbanization. Incombination,thesefactorselectedthefollowingsectors of the Jequitiba River basin as regions of high recharge potential: the south-southeast part of the headwaters in Prudente de Morais; Sete Lagoas towards the central part of the basin; and the region between Funilândia and Jequitiba, near the Jequitiba river mouth. Some management practices were suggested to improve groundwater recharge. The map of groundwater recharge potential produced in this study is valuable and is therefore proposed as tool for planners in the sustainable use of groundwater and protection of recharge a... Mostrar Tudo |
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Thesagro: |
Bacia Hidrográfica; Geologia; Política; Recurso Hídrico; Uso da Terra. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/204280/1/Groundwater-recharge.pdf
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Marc: |
LEADER 02202naa a2200229 a 4500
001 2113922
005 2020-01-24
008 2019 bl uuuu u00u1 u #d
024 7 $a10.3390/su11102955$2DOI
100 1 $aCOSTA, A. M. da
245 $aGroundwater recharge potential for sustainable water use in urban areas of the Jequitiba River basin, Brazil.$h[electronic resource]
260 $c2019
520 $aThe zoning of groundwater recharge potential would be attractive for water managers, but is lacking in many regions around the planet, including in the Jequitiba River basin, Minas Gerais, Brazil. In this study, a physically based spatially distributed method to evaluate groundwater recharge potential at catchment scale was developed and tested in the aforementioned Jequitiba River basin. The data for the test was compiled from institutional sources and implemented in a Geographic Information System. It comprised meteorological, hydrometric, relief, land use, and soil data. The average results resembled the annual recharge calculated by a hydrograph method, which worked as validation method. The spatial variation of recharge highlighted the predominant contribution of flat areas, porous aquifers, and forested regions to groundwater recharge. They also exposedthenegativeeffectofurbanization. Incombination,thesefactorselectedthefollowingsectors of the Jequitiba River basin as regions of high recharge potential: the south-southeast part of the headwaters in Prudente de Morais; Sete Lagoas towards the central part of the basin; and the region between Funilândia and Jequitiba, near the Jequitiba river mouth. Some management practices were suggested to improve groundwater recharge. The map of groundwater recharge potential produced in this study is valuable and is therefore proposed as tool for planners in the sustainable use of groundwater and protection of recharge areas.
650 $aBacia Hidrográfica
650 $aGeologia
650 $aPolítica
650 $aRecurso Hídrico
650 $aUso da Terra
700 1 $aSALIS, H. H. C. de
700 1 $aVIANA, J. H. M.
700 1 $aPACHECO, F. A. L.
773 $tSustainability$gv. 11, n. 10, article 2955, 2019.
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Embrapa Milho e Sorgo (CNPMS) |
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