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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
01/12/2008 |
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Data da última atualização: |
24/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BORGES JUNIOR, J. C. F.; FERREIRA, P. A.; ANDRADE, C. de L. T. de; HEDDEN-DUNKHORST, B. |
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Afiliação: |
João Carlos Ferreira Borges Júnior, UFRPE; Paulo A. Ferreira, UFV; CAMILO DE LELIS TEIXEIRA DE ANDRADE, CNPMS; Bettina Hedden-Dunkhorst, Federal Agency for Nature Conservation. |
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Título: |
Computational modeling for irrigated agriculture planning. Part II: risk analysis. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Engenharia Agricola, Jaboticabal, v. 28, n. 3, p. 483-493, 2008. |
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DOI: |
10.1590/S0100-69162008000300009 |
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Idioma: |
Inglês |
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Conteúdo: |
Techniques of evaluation of risks coming from inherent uncertainties to the agricultural activity should accompany planning studies. The risk analysis should be carried out by risk simulation using techniques as the Monte Carlo method. This study was carried out to develop a computer program so-called P-RISCO for the application of risky simulations on linear programming models, to apply to a case study, as well to test the results comparatively to the @RISK program. In the risk analysis it was observed that the average of the output variable total net present value, U, was considerably lower than the maximum U value obtained from the linear programming model. It was also verified that the enterprise will be front to expressive risk of shortage of water in the month of April, what doesn't happen for the cropping pattern obtained by the minimization of the irrigation requirement in the months of April in the four years. The scenario analysis indicated that the sale price of the passion fruit crop exercises expressive influence on the financial performance of the enterprise. In the comparative analysis it was verified the equivalence of P-RISCO and @RISK programs in the execution of the risk simulation for the considered scenario. Técnicas de avaliação de riscos procedentes de incertezas inerentes à atividade agrícola devem acompanhar os estudos de planejamento. A análise de risco pode ser desempenhada por meio de simulação, utilizando técnicas como o método de Monte Carto. Neste trabalho, teve-se o objetivo de desenvolver um programa computacional, denominado P-RISCO, para utilização de simulações de risco em modelos de programação linear, aplicar a um estudo de caso e testar os resultados comparativamente ao programa @RISK. Na análise de risco, observou-se que a média da variável de saída, valor presente líquido total (U), foi consideravelmente inferior ao valor máximo de U obtido no modelo de programação linear. Constatou-se, também, que o empreendimento estará frente a expressivo risco de escassez de água no mês de abril, o que não ocorre para o padrão de cultivo obtido com a minimização do requerimento de irrigação nos meses de abril dos quatro anos. A análise de cenário indicou que o preço de venda para a cultura do maracujá exerce expressiva influência sobre o desempenho financeiro do empreendimento. Na avaliação comparativa, verificou-se equivalência dos programas P-RISCO e @RISK na condução da simulação de risco para o cenário considerado. MenosTechniques of evaluation of risks coming from inherent uncertainties to the agricultural activity should accompany planning studies. The risk analysis should be carried out by risk simulation using techniques as the Monte Carlo method. This study was carried out to develop a computer program so-called P-RISCO for the application of risky simulations on linear programming models, to apply to a case study, as well to test the results comparatively to the @RISK program. In the risk analysis it was observed that the average of the output variable total net present value, U, was considerably lower than the maximum U value obtained from the linear programming model. It was also verified that the enterprise will be front to expressive risk of shortage of water in the month of April, what doesn't happen for the cropping pattern obtained by the minimization of the irrigation requirement in the months of April in the four years. The scenario analysis indicated that the sale price of the passion fruit crop exercises expressive influence on the financial performance of the enterprise. In the comparative analysis it was verified the equivalence of P-RISCO and @RISK programs in the execution of the risk simulation for the considered scenario. Técnicas de avaliação de riscos procedentes de incertezas inerentes à atividade agrícola devem acompanhar os estudos de planejamento. A análise de risco pode ser desempenhada por meio de simulação, utilizando técnicas como o método de Monte Carto. Ne... Mostrar Tudo |
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Palavras-Chave: |
Método de Monte Carto; Requerimento de irrigação; Simulação de risco. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/31357/1/Computational-modeling-II.pdf
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Marc: |
LEADER 03222naa a2200205 a 4500
001 1491595
005 2018-05-24
008 2008 bl uuuu u00u1 u #d
024 7 $a10.1590/S0100-69162008000300009$2DOI
100 1 $aBORGES JUNIOR, J. C. F.
245 $aComputational modeling for irrigated agriculture planning. Part II$brisk analysis.$h[electronic resource]
260 $c2008
520 $aTechniques of evaluation of risks coming from inherent uncertainties to the agricultural activity should accompany planning studies. The risk analysis should be carried out by risk simulation using techniques as the Monte Carlo method. This study was carried out to develop a computer program so-called P-RISCO for the application of risky simulations on linear programming models, to apply to a case study, as well to test the results comparatively to the @RISK program. In the risk analysis it was observed that the average of the output variable total net present value, U, was considerably lower than the maximum U value obtained from the linear programming model. It was also verified that the enterprise will be front to expressive risk of shortage of water in the month of April, what doesn't happen for the cropping pattern obtained by the minimization of the irrigation requirement in the months of April in the four years. The scenario analysis indicated that the sale price of the passion fruit crop exercises expressive influence on the financial performance of the enterprise. In the comparative analysis it was verified the equivalence of P-RISCO and @RISK programs in the execution of the risk simulation for the considered scenario. Técnicas de avaliação de riscos procedentes de incertezas inerentes à atividade agrícola devem acompanhar os estudos de planejamento. A análise de risco pode ser desempenhada por meio de simulação, utilizando técnicas como o método de Monte Carto. Neste trabalho, teve-se o objetivo de desenvolver um programa computacional, denominado P-RISCO, para utilização de simulações de risco em modelos de programação linear, aplicar a um estudo de caso e testar os resultados comparativamente ao programa @RISK. Na análise de risco, observou-se que a média da variável de saída, valor presente líquido total (U), foi consideravelmente inferior ao valor máximo de U obtido no modelo de programação linear. Constatou-se, também, que o empreendimento estará frente a expressivo risco de escassez de água no mês de abril, o que não ocorre para o padrão de cultivo obtido com a minimização do requerimento de irrigação nos meses de abril dos quatro anos. A análise de cenário indicou que o preço de venda para a cultura do maracujá exerce expressiva influência sobre o desempenho financeiro do empreendimento. Na avaliação comparativa, verificou-se equivalência dos programas P-RISCO e @RISK na condução da simulação de risco para o cenário considerado.
653 $aMétodo de Monte Carto
653 $aRequerimento de irrigação
653 $aSimulação de risco
700 1 $aFERREIRA, P. A.
700 1 $aANDRADE, C. de L. T. de
700 1 $aHEDDEN-DUNKHORST, B.
773 $tEngenharia Agricola, Jaboticabal$gv. 28, n. 3, p. 483-493, 2008.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
11/12/2023 |
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Data da última atualização: |
25/01/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
CALDAS, A. M.; ROLIM NETO, F. C.; PARAHYBA, R. da B. V.; CORRÊA, M. M.; RODRIGUES, A. de C. F. |
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Afiliação: |
ANILDO MONTEIRO CALDAS, UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; FERNANDO CARTAXO ROLIM NETO, UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; ROBERTO DA BOA VIAGEM PARAHYBA, CNPS; MARCUS METRI CORRÊA, UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; ADRIANA DE CARVALHO FIGUEIREDO RODRIGUES, INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO SERTÃO PERNAMBUCANO. |
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Título: |
Soil-landscape relationship in a watershed located on pleistocenic terraces and fluvio-lagunarian sediments in municipality of Recife, Brazil. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Engenharia Agrícola, v. 43, n. 4, e20230147, 2023. |
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DOI: |
https://doi.org/10.1590/1809-4430-Eng.Agric.v43n4e20230147/2023 |
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Idioma: |
Inglês |
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Conteúdo: |
In the Prata watershed there are units corresponding to the Pleistocene Terraces and the Fluvium-Lagoon Sediments. This watershed is inserted almost entirely in the area of plateaus (Tabuleiros) with altitudes of 10 to 100 meters, and in areas with altitudes of 2 to 10 meters in the area of floodplains and fluvio-lagoon terraces. The present work aimed to characterize and classify soils in the Brazilian Soil Classification System - SiBCS and correlate them with the IUSS Working Group WRB-FAO (in parentheses), besides evidence some soil-landscape relations, that occur in Pleistocene terraces and fluvium- lagoon sediments in the Prata watershed, located in the ecological reserve of Dois Irmãos State Park in Recife – PE, Brazil. Soil samples were used to perform physical, chemical and mineralogical analysis in laboratory. Watershed delimitation, Digital Elevation Model (DEM), slope map, soil map and slope x soil map were obtained and studied. The soils are quite acidic and have a very low natural fertility, with the Latossolos (Ferralsols) predominating in the landscape. The silt and clay fractions of the studied Argissolos (Acrisols) and Latossolos (Ferralsols) presented quartz and kaolinite as the main component. In the profile of Neossolo Quartzarênico (Arenosols) only quartz was identified as a component of the silt and clay fractions. The kaolinitic mineralogy of the clay fraction is consistent with the environment of its formation, that is, hot and humid. There is no relationship between the colors of soils and their exposure to the sun on the slopes where they occur. The occurrence of a sandy and whitish horizon between the litter and the A horizon, is not foreseen in the norms and criteria adopted in the Brazilian Soil Classification System - SiBCS. MenosIn the Prata watershed there are units corresponding to the Pleistocene Terraces and the Fluvium-Lagoon Sediments. This watershed is inserted almost entirely in the area of plateaus (Tabuleiros) with altitudes of 10 to 100 meters, and in areas with altitudes of 2 to 10 meters in the area of floodplains and fluvio-lagoon terraces. The present work aimed to characterize and classify soils in the Brazilian Soil Classification System - SiBCS and correlate them with the IUSS Working Group WRB-FAO (in parentheses), besides evidence some soil-landscape relations, that occur in Pleistocene terraces and fluvium- lagoon sediments in the Prata watershed, located in the ecological reserve of Dois Irmãos State Park in Recife – PE, Brazil. Soil samples were used to perform physical, chemical and mineralogical analysis in laboratory. Watershed delimitation, Digital Elevation Model (DEM), slope map, soil map and slope x soil map were obtained and studied. The soils are quite acidic and have a very low natural fertility, with the Latossolos (Ferralsols) predominating in the landscape. The silt and clay fractions of the studied Argissolos (Acrisols) and Latossolos (Ferralsols) presented quartz and kaolinite as the main component. In the profile of Neossolo Quartzarênico (Arenosols) only quartz was identified as a component of the silt and clay fractions. The kaolinitic mineralogy of the clay fraction is consistent with the environment of its formation, that is, hot and humid. There is no rela... Mostrar Tudo |
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Palavras-Chave: |
Barreiras group; Grupo Barreiras; SiBCS. |
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Thesagro: |
Classificação do Solo; Ferralsolo; Mapa. |
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Thesaurus NAL: |
Ferralsols; Soil map. |
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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/doc/1159426/1/Soil-landscape-relationship-in-a-watershed-2023.pdf
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Marc: |
LEADER 02681naa a2200277 a 4500
001 2159426
005 2024-01-25
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/1809-4430-Eng.Agric.v43n4e20230147/2023$2DOI
100 1 $aCALDAS, A. M.
245 $aSoil-landscape relationship in a watershed located on pleistocenic terraces and fluvio-lagunarian sediments in municipality of Recife, Brazil.$h[electronic resource]
260 $c2023
520 $aIn the Prata watershed there are units corresponding to the Pleistocene Terraces and the Fluvium-Lagoon Sediments. This watershed is inserted almost entirely in the area of plateaus (Tabuleiros) with altitudes of 10 to 100 meters, and in areas with altitudes of 2 to 10 meters in the area of floodplains and fluvio-lagoon terraces. The present work aimed to characterize and classify soils in the Brazilian Soil Classification System - SiBCS and correlate them with the IUSS Working Group WRB-FAO (in parentheses), besides evidence some soil-landscape relations, that occur in Pleistocene terraces and fluvium- lagoon sediments in the Prata watershed, located in the ecological reserve of Dois Irmãos State Park in Recife – PE, Brazil. Soil samples were used to perform physical, chemical and mineralogical analysis in laboratory. Watershed delimitation, Digital Elevation Model (DEM), slope map, soil map and slope x soil map were obtained and studied. The soils are quite acidic and have a very low natural fertility, with the Latossolos (Ferralsols) predominating in the landscape. The silt and clay fractions of the studied Argissolos (Acrisols) and Latossolos (Ferralsols) presented quartz and kaolinite as the main component. In the profile of Neossolo Quartzarênico (Arenosols) only quartz was identified as a component of the silt and clay fractions. The kaolinitic mineralogy of the clay fraction is consistent with the environment of its formation, that is, hot and humid. There is no relationship between the colors of soils and their exposure to the sun on the slopes where they occur. The occurrence of a sandy and whitish horizon between the litter and the A horizon, is not foreseen in the norms and criteria adopted in the Brazilian Soil Classification System - SiBCS.
650 $aFerralsols
650 $aSoil map
650 $aClassificação do Solo
650 $aFerralsolo
650 $aMapa
653 $aBarreiras group
653 $aGrupo Barreiras
653 $aSiBCS
700 1 $aROLIM NETO, F. C.
700 1 $aPARAHYBA, R. da B. V.
700 1 $aCORRÊA, M. M.
700 1 $aRODRIGUES, A. de C. F.
773 $tEngenharia Agrícola$gv. 43, n. 4, e20230147, 2023.
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