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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente; Embrapa Solos. |
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Data corrente: |
20/06/2014 |
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Data da última atualização: |
20/06/2014 |
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Autoria: |
PEREIRA, F. |
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Afiliação: |
FÁBIO PREREIRA. |
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Título: |
The interplay between atmosphere, hydrology and land use by environmental modelling. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
2013. |
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Páginas: |
211 p. |
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ISBN: |
9789174737769 |
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Idioma: |
Inglês |
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Notas: |
Academic thesis - Lund University, Water Resources Engineering, Lund. |
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Conteúdo: |
Abstract: Interactions between land surface and atmosphere induced by human activities and natural environmental dynamics act on a time scale that varies from seconds to millions of years. It is by exchanging heat, water, energy and carbon that land surface and atmospheric processes are closely interrelated and influence each other in reciprocal ways. Among the natural interactions between land surface and
atmosphere, the water cycle stands out for its complexity and relevance to all other physical processes.
In this context, numerical models are largely recommended as tools capable of quantifying, predicting and assessing the soil, surface and atmospheric water budgets. Atmospheric models present a detailed and complex approach to atmospheric processes that includes estimation of carbon, heat, energy and water fluxes between surface and atmosphere based on energy, mass and momentum equations. The numerical solution of these equations include effects of sub-grid
scale processes that are not resolved by numerical schemes but affect the resolved scales. These unresolved processes are described in terms of semi-empirical relationships by means of parameterizations.
Despite widely acknowledged improvements in parameterizations of vegetation and soil processes in order to interpret the complexities inherent in the water cycle and its interactions with the atmosphere, parameterization schemes usually apply prescribed values of parameters based on their probability density functions which assume vegetation and soil characteristics as continuous distributions, consequently, mixtures in soil and vegetation within an area of interest are not captured. Therefore, the research described in this thesis
aimed at understanding the interplay between hydrology and the atmosphere under land use changes using a two-way coupled model that incorporates a process-based approach to land surface hydrological processes to resolve both surface features and the full atmospheric response to them.
A rapid expansion of the plantation of sugarcane over the Rio Grande basin, Brazil, as a response to government measures to boost ethanol production was used as a case study on this thesis. To reproduce the sugarcane expansion over the Rio Grande basin, historical land use scenarios were defined based on satellite images captured n 1993, 2000 and 2007. Further, a forth land use scenario was also generated based on the mapping of areas suitable for cultivation of sugarcane made by the Brazilian Institute for Agricultural Research - EMBRAPA. Thereafter, specific model parameters for sugarcane were
calibrated and validated to perform analysis of short-, medium- and long-term impacts of sugarcane expansion on the local hydrology. In the meanwhile, an atmospheric-hydrological modelling system was implemented and tested against estimates from a well-known atmospheric model, satellite imagery and observed data.
Results obtained from numerical and imagery analysis revealed that most of the sugarcane expansion occurred over areas close to the outlet of the Rio Grande basin where climate and topographical conditions are more attractive for growing sugarcane. They also indicated that the amount of areas replaced with sugarcane plantations, their location within the basin, regional soil properties, and local groundwater contribution to stream flow are the main factors related to the impacts of sugarcane expansion on the water balance of the Rio Grande basin. Additionally, numerical analyses carried out in this thesis showed that the replacement of land surface parameterizations by process-based hydrological modelling implied improvement in temperature, atmospheric water content and zonal and meridional winds calculated near land surface. Finally, a conceptual evaluation of the interplay of land use changes, hydrology and atmosphere as given by the hybrid coupled model was carried out. The main goal of this evaluation was to assess whether the model behavior is in accordance with improved understanding of the hydrological cycle of the Rio Grande basin under land use changes due to sugarcane expansion over its drainage area, resulting in this work. The results obtained from four model runs using historic and possible land use scenarios showed that exchange of water between soil, land surface and atmosphere is an important factor that determines which processes will dominate the water balance during wet and dry seasons under expansion of agricultural lands. MenosAbstract: Interactions between land surface and atmosphere induced by human activities and natural environmental dynamics act on a time scale that varies from seconds to millions of years. It is by exchanging heat, water, energy and carbon that land surface and atmospheric processes are closely interrelated and influence each other in reciprocal ways. Among the natural interactions between land surface and
atmosphere, the water cycle stands out for its complexity and relevance to all other physical processes.
In this context, numerical models are largely recommended as tools capable of quantifying, predicting and assessing the soil, surface and atmospheric water budgets. Atmospheric models present a detailed and complex approach to atmospheric processes that includes estimation of carbon, heat, energy and water fluxes between surface and atmosphere based on energy, mass and momentum equations. The numerical solution of these equations include effects of sub-grid
scale processes that are not resolved by numerical schemes but affect the resolved scales. These unresolved processes are described in terms of semi-empirical relationships by means of parameterizations.
Despite widely acknowledged improvements in parameterizations of vegetation and soil processes in order to interpret the complexities inherent in the water cycle and its interactions with the atmosphere, parameterization schemes usually apply prescribed values of parameters based on their probability density functi... Mostrar Tudo |
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Palavras-Chave: |
Modelagem ambiental. |
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Thesagro: |
Atmosfera; Cana de açúcar; Uso da terra. |
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Thesaurus Nal: |
Environmental models; Land use; Sugarcane. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 05141nam a2200229 a 4500
001 1988727
005 2014-06-20
008 2013 bl uuuu m 00u1 u #d
020 $a9789174737769
100 1 $aPEREIRA, F.
245 $aThe interplay between atmosphere, hydrology and land use by environmental modelling.
260 $a2013.$c2013
300 $a211 p.
500 $aAcademic thesis - Lund University, Water Resources Engineering, Lund.
520 $aAbstract: Interactions between land surface and atmosphere induced by human activities and natural environmental dynamics act on a time scale that varies from seconds to millions of years. It is by exchanging heat, water, energy and carbon that land surface and atmospheric processes are closely interrelated and influence each other in reciprocal ways. Among the natural interactions between land surface and atmosphere, the water cycle stands out for its complexity and relevance to all other physical processes. In this context, numerical models are largely recommended as tools capable of quantifying, predicting and assessing the soil, surface and atmospheric water budgets. Atmospheric models present a detailed and complex approach to atmospheric processes that includes estimation of carbon, heat, energy and water fluxes between surface and atmosphere based on energy, mass and momentum equations. The numerical solution of these equations include effects of sub-grid scale processes that are not resolved by numerical schemes but affect the resolved scales. These unresolved processes are described in terms of semi-empirical relationships by means of parameterizations. Despite widely acknowledged improvements in parameterizations of vegetation and soil processes in order to interpret the complexities inherent in the water cycle and its interactions with the atmosphere, parameterization schemes usually apply prescribed values of parameters based on their probability density functions which assume vegetation and soil characteristics as continuous distributions, consequently, mixtures in soil and vegetation within an area of interest are not captured. Therefore, the research described in this thesis aimed at understanding the interplay between hydrology and the atmosphere under land use changes using a two-way coupled model that incorporates a process-based approach to land surface hydrological processes to resolve both surface features and the full atmospheric response to them. A rapid expansion of the plantation of sugarcane over the Rio Grande basin, Brazil, as a response to government measures to boost ethanol production was used as a case study on this thesis. To reproduce the sugarcane expansion over the Rio Grande basin, historical land use scenarios were defined based on satellite images captured n 1993, 2000 and 2007. Further, a forth land use scenario was also generated based on the mapping of areas suitable for cultivation of sugarcane made by the Brazilian Institute for Agricultural Research - EMBRAPA. Thereafter, specific model parameters for sugarcane were calibrated and validated to perform analysis of short-, medium- and long-term impacts of sugarcane expansion on the local hydrology. In the meanwhile, an atmospheric-hydrological modelling system was implemented and tested against estimates from a well-known atmospheric model, satellite imagery and observed data. Results obtained from numerical and imagery analysis revealed that most of the sugarcane expansion occurred over areas close to the outlet of the Rio Grande basin where climate and topographical conditions are more attractive for growing sugarcane. They also indicated that the amount of areas replaced with sugarcane plantations, their location within the basin, regional soil properties, and local groundwater contribution to stream flow are the main factors related to the impacts of sugarcane expansion on the water balance of the Rio Grande basin. Additionally, numerical analyses carried out in this thesis showed that the replacement of land surface parameterizations by process-based hydrological modelling implied improvement in temperature, atmospheric water content and zonal and meridional winds calculated near land surface. Finally, a conceptual evaluation of the interplay of land use changes, hydrology and atmosphere as given by the hybrid coupled model was carried out. The main goal of this evaluation was to assess whether the model behavior is in accordance with improved understanding of the hydrological cycle of the Rio Grande basin under land use changes due to sugarcane expansion over its drainage area, resulting in this work. The results obtained from four model runs using historic and possible land use scenarios showed that exchange of water between soil, land surface and atmosphere is an important factor that determines which processes will dominate the water balance during wet and dry seasons under expansion of agricultural lands.
650 $aEnvironmental models
650 $aLand use
650 $aSugarcane
650 $aAtmosfera
650 $aCana de açúcar
650 $aUso da terra
653 $aModelagem ambiental
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Biblioteca(s): |
Embrapa Cocais; Embrapa Mandioca e Fruticultura. |
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Data corrente: |
01/12/2011 |
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Data da última atualização: |
01/12/2011 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
SOUSA, V. F. de; BORGES, A. L. |
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Afiliação: |
VALDEMICIO FERREIRA DE SOUSA, CPACP; ANA LUCIA BORGES, CNPMF. |
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Título: |
Irrigação e fertirrigação na cultura do maracujá. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: SOUSA, V. F. de et al. (Ed.). Irrigação e fertirrigação em fruteiras e hortaliças. Brasília, DF: Embrapa Informação Tecnológica, 2011. 769 p. |
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Páginas: |
p. 501-522. |
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Idioma: |
Português |
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Conteúdo: |
Métodos e sistemas de irrigação; Necessidades hídricas da cultura; Exigências nutricionais; Necessidades de nutrientes para fertirrigação; Marcha de absorção de nutrientes; Cálculo da necessidade de fertilizante; Cálculo da solução fertilizante. |
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Palavras-Chave: |
Cultivo do Maracujá. |
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Thesagro: |
Fertirrigação; Irrigação; Maracujá. |
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Categoria do assunto: |
--
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/55941/1/IRRIGACAO-e-FERTIRRIGACAO-cap17.pdf
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Marc: |
LEADER 00873naa a2200193 a 4500
001 1908088
005 2011-12-01
008 2011 bl uuuu u00u1 u #d
100 1 $aSOUSA, V. F. de
245 $aIrrigação e fertirrigação na cultura do maracujá.
260 $c2011
300 $ap. 501-522.
520 $aMétodos e sistemas de irrigação; Necessidades hídricas da cultura; Exigências nutricionais; Necessidades de nutrientes para fertirrigação; Marcha de absorção de nutrientes; Cálculo da necessidade de fertilizante; Cálculo da solução fertilizante.
650 $aFertirrigação
650 $aIrrigação
650 $aMaracujá
653 $aCultivo do Maracujá
700 1 $aBORGES, A. L.
773 $tIn: SOUSA, V. F. de et al. (Ed.). Irrigação e fertirrigação em fruteiras e hortaliças. Brasília, DF: Embrapa Informação Tecnológica, 2011. 769 p.
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Embrapa Cocais (CPACP) |
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