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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
28/09/2011 |
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Data da última atualização: |
19/02/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PAZ, A. R. da; COLLISCHONN, W.; TUCCI, C. E. M.; PADOVANI, C. R. |
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Afiliação: |
ADRIANO ROLIM DA PAZ, UNIVERSIDADE FEDERAL DA PARAÍBA; WALTER COLLISCHONN, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; CARLOS E. M. TUCCI, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; CARLOS ROBERTO PADOVANI, CPAP. |
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Título: |
Large-scale modelling of channel flow and floodplain inundation dynamics and its application to the Pantanal (Brazil). |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Hydrological Processes, v. 25, p. 1498- 1516, 2011. |
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DOI: |
10.1002/hyp.7926 |
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Idioma: |
Português |
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Conteúdo: |
For large-scale sites, difficulties for applying coupled one-dimensional (1D)/2D models for simulating floodplain inundation may be encountered related to data scarcity, complexity for establishing channel?floodplain connections, computational cost, long duration of floods and the need to represent precipitation and evapotranspiration processes. This paper presents a hydrologic simulation system, named SIRIPLAN, developed to accomplish this aim. This system is composed by a 1D hydrodynamic model coupled to a 2D raster-based model, and by two modules to compute the vertical water balance over floodplain and the water exchanges between channel and floodplain. Results are presented for the Upper Paraguay River Basin (UPRB), including the Pantanal, one of the world?s largest wetlands. A total of 3965 km of river channels and 140 000 km2 of floodplains are simulated for a period of 11 years. Comparison of observed and calculated hydrographs at 15 gauging stations showed that the model was capable to simulate distinct, complex flow regimes along main channels, including channelfloodplain interactions. The proposed system was also able to reproduce the Pantanal seasonal flood pulse, with estimated inundated areas ranging from 35 000 km2 (dry period) to more than 120 000 km2 (wet period). Floodplain inundation maps obtained with SIRIPLAN were consistent with previous knowledge of Pantanal dynamics, but comparison with inundation extent provided by a previous satellite-based study indicates that permanently flooded areas may have been underestimated. The results obtained are promising, and further work will focus on improving vertical processes representation over floodplains and analysing model sensitivity to floodplain parameters, time step and precipitation estimates uncertainty. MenosFor large-scale sites, difficulties for applying coupled one-dimensional (1D)/2D models for simulating floodplain inundation may be encountered related to data scarcity, complexity for establishing channel?floodplain connections, computational cost, long duration of floods and the need to represent precipitation and evapotranspiration processes. This paper presents a hydrologic simulation system, named SIRIPLAN, developed to accomplish this aim. This system is composed by a 1D hydrodynamic model coupled to a 2D raster-based model, and by two modules to compute the vertical water balance over floodplain and the water exchanges between channel and floodplain. Results are presented for the Upper Paraguay River Basin (UPRB), including the Pantanal, one of the world?s largest wetlands. A total of 3965 km of river channels and 140 000 km2 of floodplains are simulated for a period of 11 years. Comparison of observed and calculated hydrographs at 15 gauging stations showed that the model was capable to simulate distinct, complex flow regimes along main channels, including channelfloodplain interactions. The proposed system was also able to reproduce the Pantanal seasonal flood pulse, with estimated inundated areas ranging from 35 000 km2 (dry period) to more than 120 000 km2 (wet period). Floodplain inundation maps obtained with SIRIPLAN were consistent with previous knowledge of Pantanal dynamics, but comparison with inundation extent provided by a previous satellite-based study in... Mostrar Tudo |
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Palavras-Chave: |
Hydrodinamic model; Hydrologic modelling. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02403naa a2200193 a 4500
001 1901551
005 2013-02-19
008 2011 bl --- 0-- u #d
024 7 $a10.1002/hyp.7926$2DOI
100 1 $aPAZ, A. R. da
245 $aLarge-scale modelling of channel flow and floodplain inundation dynamics and its application to the Pantanal (Brazil).
260 $c2011
520 $aFor large-scale sites, difficulties for applying coupled one-dimensional (1D)/2D models for simulating floodplain inundation may be encountered related to data scarcity, complexity for establishing channel?floodplain connections, computational cost, long duration of floods and the need to represent precipitation and evapotranspiration processes. This paper presents a hydrologic simulation system, named SIRIPLAN, developed to accomplish this aim. This system is composed by a 1D hydrodynamic model coupled to a 2D raster-based model, and by two modules to compute the vertical water balance over floodplain and the water exchanges between channel and floodplain. Results are presented for the Upper Paraguay River Basin (UPRB), including the Pantanal, one of the world?s largest wetlands. A total of 3965 km of river channels and 140 000 km2 of floodplains are simulated for a period of 11 years. Comparison of observed and calculated hydrographs at 15 gauging stations showed that the model was capable to simulate distinct, complex flow regimes along main channels, including channelfloodplain interactions. The proposed system was also able to reproduce the Pantanal seasonal flood pulse, with estimated inundated areas ranging from 35 000 km2 (dry period) to more than 120 000 km2 (wet period). Floodplain inundation maps obtained with SIRIPLAN were consistent with previous knowledge of Pantanal dynamics, but comparison with inundation extent provided by a previous satellite-based study indicates that permanently flooded areas may have been underestimated. The results obtained are promising, and further work will focus on improving vertical processes representation over floodplains and analysing model sensitivity to floodplain parameters, time step and precipitation estimates uncertainty.
653 $aHydrodinamic model
653 $aHydrologic modelling
700 1 $aCOLLISCHONN, W.
700 1 $aTUCCI, C. E. M.
700 1 $aPADOVANI, C. R.
773 $tHydrological Processes$gv. 25, p. 1498- 1516, 2011.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
29/04/2022 |
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Data da última atualização: |
29/04/2022 |
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Autoria: |
SILVA, C. E. S. da; XAVIER, C. N.; JUNQUEIRA, A. A.; NEVES JUNIOR, O. de F.; CARVALHO, P. C. L. de; TORRES, A. C.; CARVALHO, A. M. de. |
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Título: |
Investigating the generation of wood wastes from mechanical processing of two forest species. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, Colombo, v. 42, e202002138, 2022. |
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Páginas: |
p. 1-8. |
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ISSN: |
1983-2605 |
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DOI: |
http://doi.org/10.4336/2022.pfb.42e202002138 |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT. The circular saw is a tool commonly used for wood processing. It may be presented at different models. Considering their specificities, they can generate different amount of waste. The objective of this study was to evaluate the generation of waste from Tectona grandis L. f. and Pinus caribaea var. hondurensis, processed with two saws of the multiple type (48 and 36 teeth) and one of the universal type (28 teeth). The cutting process followed in grain direction into ninety samples, 15 for each species and saw, until the sample was completely processed. The processing time was measured and the waste was collected in each operation. ANOVA and test of multiple comparison of averages were applied. The influence of the teeth number and type of saw on the amount of waste generated was verified. The universal saw was the one that generated the highest amount of waste. It reached up to 116% more than the multiple saw, that generated the lowest amount of waste (36 teeth). P. caribaea var. hondurensis generated 7% more waste and presented shorter processing time (22%), when compared to T. grandis. TÍTULO. Investigando a geração de resíduos do processamento mecânico da madeira de duas espécies florestais RESUMO. Aserra circular é uma ferramenta comumente empregada para o processamento de madeira, sendo apresentada em diversos modelos e, por suas especificidades, podem interferir na quantidade de resíduos gerados. O objetivo deste estudo foi avaliar a geração de resíduos de Tectona grandis L. f. e Pinus caribaea var. hondurensis, processadas com duas serras do tipo múltipla (48 e 36 dentes) e uma do tipo universal (28 dentes). Foram efetuados cortes a favor da grã em noventa corpos de prova, 15 para cada espécie e serra, até o processamento completo da amostra. Foi medido o tempo de processamento e coletado o resíduo em cada operação. A ANOVA e o teste de comparação múltipla de médias foram aplicados. Constatou-se a influência do número de dentes e do tipo de serra na quantidade de resíduos gerados. A serra do tipo universal foi a que gerou maior quantidade média de resíduos, resultando em 116% a mais em comparação com a serra múltipla que gerou menor volume de resíduos (36 dentes). P. caribaea var. hondurensis gerou 7% mais resíduos e menor tempo de processamento (22%), quando comparado a T. grandis. MenosABSTRACT. The circular saw is a tool commonly used for wood processing. It may be presented at different models. Considering their specificities, they can generate different amount of waste. The objective of this study was to evaluate the generation of waste from Tectona grandis L. f. and Pinus caribaea var. hondurensis, processed with two saws of the multiple type (48 and 36 teeth) and one of the universal type (28 teeth). The cutting process followed in grain direction into ninety samples, 15 for each species and saw, until the sample was completely processed. The processing time was measured and the waste was collected in each operation. ANOVA and test of multiple comparison of averages were applied. The influence of the teeth number and type of saw on the amount of waste generated was verified. The universal saw was the one that generated the highest amount of waste. It reached up to 116% more than the multiple saw, that generated the lowest amount of waste (36 teeth). P. caribaea var. hondurensis generated 7% more waste and presented shorter processing time (22%), when compared to T. grandis. TÍTULO. Investigando a geração de resíduos do processamento mecânico da madeira de duas espécies florestais RESUMO. Aserra circular é uma ferramenta comumente empregada para o processamento de madeira, sendo apresentada em diversos modelos e, por suas especificidades, podem interferir na quantidade de resíduos gerados. O objetivo deste estudo foi avaliar a geração de resíduos de Te... Mostrar Tudo |
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Palavras-Chave: |
Plant production. |
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Thesagro: |
Produção Vegetal; Produto Florestal; Serraria. |
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Thesaurus NAL: |
Forest products; Sawmills. |
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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/1142509/1/EmbrapaFlorestas-PFB-2022-InvestigatingtheGenerationOfWood.pdf
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Marc: |
LEADER 03286naa a2200301 a 4500
001 2142509
005 2022-04-29
008 2022 bl uuuu u00u1 u #d
022 $a1983-2605
024 7 $ahttp://doi.org/10.4336/2022.pfb.42e202002138$2DOI
100 1 $aSILVA, C. E. S. da
245 $aInvestigating the generation of wood wastes from mechanical processing of two forest species.$h[electronic resource]
260 $c2022
300 $ap. 1-8.
520 $aABSTRACT. The circular saw is a tool commonly used for wood processing. It may be presented at different models. Considering their specificities, they can generate different amount of waste. The objective of this study was to evaluate the generation of waste from Tectona grandis L. f. and Pinus caribaea var. hondurensis, processed with two saws of the multiple type (48 and 36 teeth) and one of the universal type (28 teeth). The cutting process followed in grain direction into ninety samples, 15 for each species and saw, until the sample was completely processed. The processing time was measured and the waste was collected in each operation. ANOVA and test of multiple comparison of averages were applied. The influence of the teeth number and type of saw on the amount of waste generated was verified. The universal saw was the one that generated the highest amount of waste. It reached up to 116% more than the multiple saw, that generated the lowest amount of waste (36 teeth). P. caribaea var. hondurensis generated 7% more waste and presented shorter processing time (22%), when compared to T. grandis. TÍTULO. Investigando a geração de resíduos do processamento mecânico da madeira de duas espécies florestais RESUMO. Aserra circular é uma ferramenta comumente empregada para o processamento de madeira, sendo apresentada em diversos modelos e, por suas especificidades, podem interferir na quantidade de resíduos gerados. O objetivo deste estudo foi avaliar a geração de resíduos de Tectona grandis L. f. e Pinus caribaea var. hondurensis, processadas com duas serras do tipo múltipla (48 e 36 dentes) e uma do tipo universal (28 dentes). Foram efetuados cortes a favor da grã em noventa corpos de prova, 15 para cada espécie e serra, até o processamento completo da amostra. Foi medido o tempo de processamento e coletado o resíduo em cada operação. A ANOVA e o teste de comparação múltipla de médias foram aplicados. Constatou-se a influência do número de dentes e do tipo de serra na quantidade de resíduos gerados. A serra do tipo universal foi a que gerou maior quantidade média de resíduos, resultando em 116% a mais em comparação com a serra múltipla que gerou menor volume de resíduos (36 dentes). P. caribaea var. hondurensis gerou 7% mais resíduos e menor tempo de processamento (22%), quando comparado a T. grandis.
650 $aForest products
650 $aSawmills
650 $aProdução Vegetal
650 $aProduto Florestal
650 $aSerraria
653 $aPlant production
700 1 $aXAVIER, C. N.
700 1 $aJUNQUEIRA, A. A.
700 1 $aNEVES JUNIOR, O. de F.
700 1 $aCARVALHO, P. C. L. de
700 1 $aTORRES, A. C.
700 1 $aCARVALHO, A. M. de
773 $tPesquisa Florestal Brasileira, Colombo$gv. 42, e202002138, 2022.
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Registro original: |
Embrapa Florestas (CNPF) |
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