Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.

Detalhes bibliográficos
Autor(a) principal: TEIXEIRA, A. H. de C.
Data de Publicação: 2014
Outros Autores: HERNANDEZ, F. B. T., ANDRADE, R. G., LEIVAS, J. F., BOLFE, E. L.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1001276
Resumo: The energy balance (EB) components were quantified in a commercial farm with corn crop, irrigated by central pivots, in the Northwestern side of São Paulo state, Southeast Brazil. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) was applied to retrieve the latent heat flux (λE), considering six pivots, covering irrigated areas from 74 to 108 ha. With λE quantified and considering soil heat flux (G) as a fraction of net radiation (Rn), the sensible heat flux (H) was acquired as a residual in the energy balance equation. Seven Landsat satellite images, covering all corn crop stages from 23 April 2010 to 29 August 2010, allowed relating the energy balance components according to the accumulated degree-days (DDac) from the planting to harvest dates. The average Rn values ranging from 5.2 to 7.2 MJ m-2 day-1, represented 30 to 45% of global solar radiation (RG). Considering the variation of the energy balance components along the corn crop growing seasons, the average ranges for λE, H and G were respectively 0.0 to 6.4 MJ m-2 day-1, -1.5 to 6.7 MJ m-2 day-1 and 0.1 to 0.6 MJ m-2 day-1. The fraction of the available energy (Rn - G) used as λE was from 0.0 to 1.3 indicated a good irrigation management, insuring that the water deficit could not be the reason of any yield reduction. Although Rn did not reflected well the crop stages, its partition strongly depended on these stages. λE higher than Rn and the negative H/Rn, happened sometimes along the corn growing seasons. This occurred after the vegetative growth and before the harvest times, indicating heat advection from the surrounding areas to the irrigation pivots, which represented an additional energy source for the evaporative process. The models applied here with only the visible and infrared bands of the Landsat sensor are very useful for the energy balance analyses, considering the size of the corn crop irrigation pivots in Southeast Brazil, when subsidizing a rational irrigation water application in corn crop.
id EMBR_5474ebe4ce09ccf02819023c781edecd
oai_identifier_str oai:www.alice.cnptia.embrapa.br:doc/1001276
network_acronym_str EMBR
network_name_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository_id_str 2154
spelling Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.Soil heat fluxLatent heat fluxNet radiationSensible heat fluxThe energy balance (EB) components were quantified in a commercial farm with corn crop, irrigated by central pivots, in the Northwestern side of São Paulo state, Southeast Brazil. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) was applied to retrieve the latent heat flux (λE), considering six pivots, covering irrigated areas from 74 to 108 ha. With λE quantified and considering soil heat flux (G) as a fraction of net radiation (Rn), the sensible heat flux (H) was acquired as a residual in the energy balance equation. Seven Landsat satellite images, covering all corn crop stages from 23 April 2010 to 29 August 2010, allowed relating the energy balance components according to the accumulated degree-days (DDac) from the planting to harvest dates. The average Rn values ranging from 5.2 to 7.2 MJ m-2 day-1, represented 30 to 45% of global solar radiation (RG). Considering the variation of the energy balance components along the corn crop growing seasons, the average ranges for λE, H and G were respectively 0.0 to 6.4 MJ m-2 day-1, -1.5 to 6.7 MJ m-2 day-1 and 0.1 to 0.6 MJ m-2 day-1. The fraction of the available energy (Rn - G) used as λE was from 0.0 to 1.3 indicated a good irrigation management, insuring that the water deficit could not be the reason of any yield reduction. Although Rn did not reflected well the crop stages, its partition strongly depended on these stages. λE higher than Rn and the negative H/Rn, happened sometimes along the corn growing seasons. This occurred after the vegetative growth and before the harvest times, indicating heat advection from the surrounding areas to the irrigation pivots, which represented an additional energy source for the evaporative process. The models applied here with only the visible and infrared bands of the Landsat sensor are very useful for the energy balance analyses, considering the size of the corn crop irrigation pivots in Southeast Brazil, when subsidizing a rational irrigation water application in corn crop.Presented at the 16th Remote Sensing for Agriculture, Ecosystems, and Hydrology.ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; FERNANDO B. T. HERNANDEZ, UNESP; RICARDO GUIMARAES ANDRADE, CNPM; JANICE FREITAS LEIVAS, CNPM; EDSON LUIS BOLFE, CNPM.TEIXEIRA, A. H. de C.HERNANDEZ, F. B. T.ANDRADE, R. G.LEIVAS, J. F.BOLFE, E. L.2014-12-02T11:11:11Z2014-12-02T11:11:11Z2014-12-0220142014-12-02T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleProceedings of SPIE, v. 9239, p. 92390O-1 - 92390O-10, 2014.0277-786Xhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/100127610.1117/12.2067090porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T00:37:58Zoai:www.alice.cnptia.embrapa.br:doc/1001276Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T00:37:58falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T00:37:58Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
title Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
spellingShingle Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
TEIXEIRA, A. H. de C.
Soil heat flux
Latent heat flux
Net radiation
Sensible heat flux
title_short Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
title_full Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
title_fullStr Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
title_full_unstemmed Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
title_sort Energy balance with Landsat images in irrigated central pivots with corn crop in the São Paulo State, Brazil.
author TEIXEIRA, A. H. de C.
author_facet TEIXEIRA, A. H. de C.
HERNANDEZ, F. B. T.
ANDRADE, R. G.
LEIVAS, J. F.
BOLFE, E. L.
author_role author
author2 HERNANDEZ, F. B. T.
ANDRADE, R. G.
LEIVAS, J. F.
BOLFE, E. L.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; FERNANDO B. T. HERNANDEZ, UNESP; RICARDO GUIMARAES ANDRADE, CNPM; JANICE FREITAS LEIVAS, CNPM; EDSON LUIS BOLFE, CNPM.
dc.contributor.author.fl_str_mv TEIXEIRA, A. H. de C.
HERNANDEZ, F. B. T.
ANDRADE, R. G.
LEIVAS, J. F.
BOLFE, E. L.
dc.subject.por.fl_str_mv Soil heat flux
Latent heat flux
Net radiation
Sensible heat flux
topic Soil heat flux
Latent heat flux
Net radiation
Sensible heat flux
description The energy balance (EB) components were quantified in a commercial farm with corn crop, irrigated by central pivots, in the Northwestern side of São Paulo state, Southeast Brazil. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) was applied to retrieve the latent heat flux (λE), considering six pivots, covering irrigated areas from 74 to 108 ha. With λE quantified and considering soil heat flux (G) as a fraction of net radiation (Rn), the sensible heat flux (H) was acquired as a residual in the energy balance equation. Seven Landsat satellite images, covering all corn crop stages from 23 April 2010 to 29 August 2010, allowed relating the energy balance components according to the accumulated degree-days (DDac) from the planting to harvest dates. The average Rn values ranging from 5.2 to 7.2 MJ m-2 day-1, represented 30 to 45% of global solar radiation (RG). Considering the variation of the energy balance components along the corn crop growing seasons, the average ranges for λE, H and G were respectively 0.0 to 6.4 MJ m-2 day-1, -1.5 to 6.7 MJ m-2 day-1 and 0.1 to 0.6 MJ m-2 day-1. The fraction of the available energy (Rn - G) used as λE was from 0.0 to 1.3 indicated a good irrigation management, insuring that the water deficit could not be the reason of any yield reduction. Although Rn did not reflected well the crop stages, its partition strongly depended on these stages. λE higher than Rn and the negative H/Rn, happened sometimes along the corn growing seasons. This occurred after the vegetative growth and before the harvest times, indicating heat advection from the surrounding areas to the irrigation pivots, which represented an additional energy source for the evaporative process. The models applied here with only the visible and infrared bands of the Landsat sensor are very useful for the energy balance analyses, considering the size of the corn crop irrigation pivots in Southeast Brazil, when subsidizing a rational irrigation water application in corn crop.
publishDate 2014
dc.date.none.fl_str_mv 2014-12-02T11:11:11Z
2014-12-02T11:11:11Z
2014-12-02
2014
2014-12-02T11:11:11Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv Proceedings of SPIE, v. 9239, p. 92390O-1 - 92390O-10, 2014.
0277-786X
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1001276
10.1117/12.2067090
identifier_str_mv Proceedings of SPIE, v. 9239, p. 92390O-1 - 92390O-10, 2014.
0277-786X
10.1117/12.2067090
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1001276
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
_version_ 1794503397874860032