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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
13/02/1996 |
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Data da última atualização: |
11/11/2011 |
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Autoria: |
SOUZA, F. de. |
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Título: |
Non linear hyorddynamic model of furrow irrigation. |
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Ano de publicação: |
1974 |
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Fonte/Imprenta: |
California: University of California, 1974. |
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Páginas: |
172p. |
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Idioma: |
Inglês |
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Notas: |
Tese Doutorado. |
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Conteúdo: |
A mathematical model of the entire furrow-irrigation process has been developed. This model can be used to analyze and predict the performance of free-draining sloping furrow irrigation systems; capability for prediction of flow with cutback was also provided. The model is based on the solution of the complete continuity and momentum conservation equations, which govern the unsteady, gradually varied flow of water in open channels. Therefore, it is a complete hydrodynamic model. In addition, it has been demonstrated that zero-inertia conditions can also be simulated by the present model. A fully implicit finite-difference scheme was used to find approximate solutions for the integrated form of the non-linear governing equations, which are simultaneously solved by the double-sweep technique. The input to the model consists of the inflow discharge, furrow slope, cutoff (application) time, length, roughness (the Manning n), soil-infiltration characteristics (k and a in the Kostiakov equation), and furrow shape (C and M in the top width equation, B = CyM, for a power-law cross section). Output information consists of advance and recession times, post-irrigation areal distribution of infiltrated water along the furrow, runoff volume, as well as water application and storage efficiencies. Dimensional analysis was applied to reduce the number of governing parameters in the equations. |
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Palavras-Chave: |
Furrow; Mathematical model; Sulco. |
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Thesagro: |
Irrigação; Modelo Matemático. |
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Thesaurus Nal: |
irrigation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01919nam a2200205 a 4500
001 1076002
005 2011-11-11
008 1974 bl uuuu m 00u1 u #d
100 1 $aSOUZA, F. de
245 $aNon linear hyorddynamic model of furrow irrigation.
260 $aCalifornia: University of California$c1974
300 $a172p.
500 $aTese Doutorado.
520 $aA mathematical model of the entire furrow-irrigation process has been developed. This model can be used to analyze and predict the performance of free-draining sloping furrow irrigation systems; capability for prediction of flow with cutback was also provided. The model is based on the solution of the complete continuity and momentum conservation equations, which govern the unsteady, gradually varied flow of water in open channels. Therefore, it is a complete hydrodynamic model. In addition, it has been demonstrated that zero-inertia conditions can also be simulated by the present model. A fully implicit finite-difference scheme was used to find approximate solutions for the integrated form of the non-linear governing equations, which are simultaneously solved by the double-sweep technique. The input to the model consists of the inflow discharge, furrow slope, cutoff (application) time, length, roughness (the Manning n), soil-infiltration characteristics (k and a in the Kostiakov equation), and furrow shape (C and M in the top width equation, B = CyM, for a power-law cross section). Output information consists of advance and recession times, post-irrigation areal distribution of infiltrated water along the furrow, runoff volume, as well as water application and storage efficiencies. Dimensional analysis was applied to reduce the number of governing parameters in the equations.
650 $airrigation
650 $aIrrigação
650 $aModelo Matemático
653 $aFurrow
653 $aMathematical model
653 $aSulco
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
01/09/2021 |
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Data da última atualização: |
01/09/2021 |
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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: |
FONTES, J. R. A.; OLIVEIRA, I. J. de; MORAIS, R. R. de. |
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Afiliação: |
JOSE ROBERTO ANTONIOL FONTES, CPAA; INOCENCIO JUNIOR DE OLIVEIRA, CPAA; RONALDO RIBEIRO DE MORAIS, CPAA. |
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Título: |
Selectivity and efficiency of herbicides in cassava on the floodplain of the Solimões river. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Revista Agro@mbiente On-line, v. 15, p. 1-15, 2021. |
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DOI: |
http://dx.doi.org/10.18227/1982-8470ragro.v15i0.6393 |
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Idioma: |
Inglês |
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Notas: |
Título em Português: Seletividade e eficácia de herbicidas na cultura da mandioca em várzea do rio Solimões. |
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Conteúdo: |
Cassava is grown on the floodplains of the Solimões river and guarantees food security and income for farmers. However, negative interference of weeds can result in a significant yield loss in the crop. Therefore, the aim of this study was to evaluate the selectivity of herbicides and efficiency of chemical weed control in the cassava 'Aipim-manteiga' cultivar, in the floodplain of the Solimões river, in Iranduba, Amazonas. A mandioca é cultivada em várzeas do rio Solimões e garante segurança alimentar e renda para os agricultores. Porém, a interferência negativa de plantas daninhas na cultura pode resultar em perdas significativas de produtividade. Assim, objetivou-se com este trabalho avaliar a seletividade de herbicidas e a eficácia do controle químico de plantas daninhas na cultura, cultivar 'Aipim manteiga', em várzea do rio Solimões, Iranduba-AM. |
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Thesagro: |
Controle Químico; Erva Daninha; Herbicida; Mandioca; Manihot Esculenta. |
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Thesaurus NAL: |
Chemical control. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/225647/1/6393-26932-1-PB.pdf
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Marc: |
LEADER 01723naa a2200241 a 4500
001 2133987
005 2021-09-01
008 2021 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.18227/1982-8470ragro.v15i0.6393$2DOI
100 1 $aFONTES, J. R. A.
245 $aSelectivity and efficiency of herbicides in cassava on the floodplain of the Solimões river.$h[electronic resource]
260 $c2021
500 $aTítulo em Português: Seletividade e eficácia de herbicidas na cultura da mandioca em várzea do rio Solimões.
520 $aCassava is grown on the floodplains of the Solimões river and guarantees food security and income for farmers. However, negative interference of weeds can result in a significant yield loss in the crop. Therefore, the aim of this study was to evaluate the selectivity of herbicides and efficiency of chemical weed control in the cassava 'Aipim-manteiga' cultivar, in the floodplain of the Solimões river, in Iranduba, Amazonas. A mandioca é cultivada em várzeas do rio Solimões e garante segurança alimentar e renda para os agricultores. Porém, a interferência negativa de plantas daninhas na cultura pode resultar em perdas significativas de produtividade. Assim, objetivou-se com este trabalho avaliar a seletividade de herbicidas e a eficácia do controle químico de plantas daninhas na cultura, cultivar 'Aipim manteiga', em várzea do rio Solimões, Iranduba-AM.
650 $aChemical control
650 $aControle Químico
650 $aErva Daninha
650 $aHerbicida
650 $aMandioca
650 $aManihot Esculenta
700 1 $aOLIVEIRA, I. J. de
700 1 $aMORAIS, R. R. de
773 $tRevista Agro@mbiente On-line$gv. 15, p. 1-15, 2021.
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Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
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