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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Hortaliças. |
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Data corrente: |
03/03/1997 |
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Data da última atualização: |
03/03/1998 |
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Autoria: |
SILVA, E. M. da. |
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Título: |
A test of the independent domain theory for predicting moisture hysteretic paths. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Davis: University of California, [1980]. |
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Páginas: |
165p. |
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Descrição Física: |
Ms.C. Thesis. |
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Idioma: |
Inglês |
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Conteúdo: |
The conceptual model of hysteresis as proposed by Mualem (1974) was used as means of testing the independent domain theory to describe measured primary scanning curves. Three porus materials were used: Boise sandstone, yolo fine sandy loam, and Aiken clay. Water content values at a given capillary presure head were measured using a statc equilibrium method. The applied pressure increment for reaching each point along a specific characteristic curve was equally spaced. Appreciable water evaporation losses were registered and a correction was utilized to obtein the actual water content values.The measured moisture characteristics varied considerably for each poruous material. The area enclosed between boudary curves benig smaller for sandstone than that for the other materials was an indication that the pore geometry and its radial interconnections was simpler for sandstone than for the natural soils. The comparison between predicted measured scanning curves was better for the sandstone than for soils. In general there was a satisfactory agreement between theory and measured data. The mathematical model used is simple to apply and does not require much computation time for its application. |
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Palavras-Chave: |
Medida; Moisture; Moisture content; Soil water contents; Water availability; Water movement. |
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Thesagro: |
Água; Água do Solo; Modelo Matemático; Movimento; Porosidade; Solo; Umidade; Umidade do Solo. |
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Thesaurus Nal: |
hysteresis; mathematical models; soil; soil pore system; water content. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02122nam a2200349 a 4500
001 1557878
005 1998-03-03
008 1980 bl uuuu m 00u1 u #d
100 1 $aSILVA, E. M. da
245 $aA test of the independent domain theory for predicting moisture hysteretic paths.
260 $aDavis: University of California, [1980].$c1980
300 $a165p.$cMs.C. Thesis.
520 $aThe conceptual model of hysteresis as proposed by Mualem (1974) was used as means of testing the independent domain theory to describe measured primary scanning curves. Three porus materials were used: Boise sandstone, yolo fine sandy loam, and Aiken clay. Water content values at a given capillary presure head were measured using a statc equilibrium method. The applied pressure increment for reaching each point along a specific characteristic curve was equally spaced. Appreciable water evaporation losses were registered and a correction was utilized to obtein the actual water content values.The measured moisture characteristics varied considerably for each poruous material. The area enclosed between boudary curves benig smaller for sandstone than that for the other materials was an indication that the pore geometry and its radial interconnections was simpler for sandstone than for the natural soils. The comparison between predicted measured scanning curves was better for the sandstone than for soils. In general there was a satisfactory agreement between theory and measured data. The mathematical model used is simple to apply and does not require much computation time for its application.
650 $ahysteresis
650 $amathematical models
650 $asoil
650 $asoil pore system
650 $awater content
650 $aÁgua
650 $aÁgua do Solo
650 $aModelo Matemático
650 $aMovimento
650 $aPorosidade
650 $aSolo
650 $aUmidade
650 $aUmidade do Solo
653 $aMedida
653 $aMoisture
653 $aMoisture content
653 $aSoil water contents
653 $aWater availability
653 $aWater movement
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 240 | |
| 9. |  | SILVA, E. M. da; HASEGAWA, S. Measuring soil water content by using TDR. In: PROJECT of sustainable agricultural development and natural resources conservation in the Brazilian Cerrado: technical report 1994-1999. Planaltina, DF: JICA: Embrapa Cerrados, 2000. Cap. 19. p. 338.381. 1 CD ROM. Editado por Edson Sano.| Biblioteca(s): Embrapa Cerrados. |
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| 15. | | LIMA, J. E. F. W.; SILVA, E. M. da. Análise da situação dos recursos hídricos do Cerrado com base na importância econômica e socioambiental de suas águas. In: SIMPÓSIO NACIONAL CERRADO, 9.; SIMPÓSIO INTERNACIONAL SAVANAS TROPICAIS, 2., 2008, Brasília, DF. Desafios e estratégias para o equilíbrio entre sociedade, agronegócio e recursos naturais: anais... Planaltina, DF: Embrapa Cerrados, 2008. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| 18. | | SILVA, E. M. da; LIMA, J. E. F. W. Desenvolvimento e adaptação de técnicas de manejo da água na cafeicultura irrigada em solos arenosos do oeste baiano. In: MOSTRA DE RESULTADOS DE PESQUISA DOS PROJETOS FINALIZADOS EM 2006 E 2007, 2., 2009, Planaltina, DF. [Anais...]. Planaltina, DF: Embrapa Cerrados, 2009. p. 121-128. (Embrapa Cerrados. Documentos, 244). Editores técnicos Eduardo Cyrino de Oliveira-Filho, Fernando Antônio Macena da Silva, Maria Lucia Meirelles, Eduardo Alano Vieira, Geraldo Bueno Martha Junior, Arminda Moreira de Carvalho, José Carlos Sousa e Silva, CPAC.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 240 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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