Future water requirements for rice irrigation in the Pardo river basin (Brazil)
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/248369 |
Resumo: | The objective of this research was to estimate the future water requirements for rice paddy irrigation in the Pardo River Basin (Brazil) taking into account the changes in cultivation systems that are likely to occur in the near future in that region. After identifying the major trends in the rice cultivation systems, different scenarios were set and the water requirements for these scenarios were estimated using mathematical modelling and geoprocessing techniques. Census data indicate that the rice-growing area in the Pardo River Basin is expanding. However, the use of water per hectare is decreasing, as a result of increasing water use efficiency. The main agent behind this higher efficiency is land-levelling, which allows for a reduced volume of water required for flooding the paddies. Despite this improvement however, the overall water demands in future scenarios will still be greater than the current demands due to the expansion of the farmed area. However, these demands can be minimized if land-levelling is adopted more intensively across the entire Basin. Otherwise, there will be a need for either controlling the expansion of the rice-growing area, or increasing water availability through construction of additional reservoirs to minimize potential conflict amongst water users in the near future. |
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Helfer, FernandaLouzada, José Antônio Saldanha2022-08-31T04:56:50Z20111413-7895http://hdl.handle.net/10183/248369000819092The objective of this research was to estimate the future water requirements for rice paddy irrigation in the Pardo River Basin (Brazil) taking into account the changes in cultivation systems that are likely to occur in the near future in that region. After identifying the major trends in the rice cultivation systems, different scenarios were set and the water requirements for these scenarios were estimated using mathematical modelling and geoprocessing techniques. Census data indicate that the rice-growing area in the Pardo River Basin is expanding. However, the use of water per hectare is decreasing, as a result of increasing water use efficiency. The main agent behind this higher efficiency is land-levelling, which allows for a reduced volume of water required for flooding the paddies. Despite this improvement however, the overall water demands in future scenarios will still be greater than the current demands due to the expansion of the farmed area. However, these demands can be minimized if land-levelling is adopted more intensively across the entire Basin. Otherwise, there will be a need for either controlling the expansion of the rice-growing area, or increasing water availability through construction of additional reservoirs to minimize potential conflict amongst water users in the near future.application/pdfengIrriga. Botucatu. Vol. 16, n. 4 (out./dez. 2011), p. 459-475Demanda hidricaArroz irrigadoManejo de agua : IrrigacaoGISSistemas de Informação Geográfica (SIG)Pardo, Rio (RS)RiceWater requirementsIrrigationGISWater availability demandFuture water requirements for rice irrigation in the Pardo river basin (Brazil)info:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT000819092.pdf.txt000819092.pdf.txtExtracted Texttext/plain47386http://www.lume.ufrgs.br/bitstream/10183/248369/2/000819092.pdf.txtf11aef59559ed12cf3acc75e74f4225eMD52ORIGINAL000819092.pdfTexto completo (inglês)application/pdf2111973http://www.lume.ufrgs.br/bitstream/10183/248369/1/000819092.pdf8f77d17dc5fc17feca85e7acf9110d86MD5110183/2483692022-10-27 04:52:32.963oai:www.lume.ufrgs.br:10183/248369Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-10-27T07:52:32Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
title |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
spellingShingle |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) Helfer, Fernanda Demanda hidrica Arroz irrigado Manejo de agua : Irrigacao GIS Sistemas de Informação Geográfica (SIG) Pardo, Rio (RS) Rice Water requirements Irrigation GIS Water availability demand |
title_short |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
title_full |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
title_fullStr |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
title_full_unstemmed |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
title_sort |
Future water requirements for rice irrigation in the Pardo river basin (Brazil) |
author |
Helfer, Fernanda |
author_facet |
Helfer, Fernanda Louzada, José Antônio Saldanha |
author_role |
author |
author2 |
Louzada, José Antônio Saldanha |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Helfer, Fernanda Louzada, José Antônio Saldanha |
dc.subject.por.fl_str_mv |
Demanda hidrica Arroz irrigado Manejo de agua : Irrigacao GIS Sistemas de Informação Geográfica (SIG) Pardo, Rio (RS) |
topic |
Demanda hidrica Arroz irrigado Manejo de agua : Irrigacao GIS Sistemas de Informação Geográfica (SIG) Pardo, Rio (RS) Rice Water requirements Irrigation GIS Water availability demand |
dc.subject.eng.fl_str_mv |
Rice Water requirements Irrigation GIS Water availability demand |
description |
The objective of this research was to estimate the future water requirements for rice paddy irrigation in the Pardo River Basin (Brazil) taking into account the changes in cultivation systems that are likely to occur in the near future in that region. After identifying the major trends in the rice cultivation systems, different scenarios were set and the water requirements for these scenarios were estimated using mathematical modelling and geoprocessing techniques. Census data indicate that the rice-growing area in the Pardo River Basin is expanding. However, the use of water per hectare is decreasing, as a result of increasing water use efficiency. The main agent behind this higher efficiency is land-levelling, which allows for a reduced volume of water required for flooding the paddies. Despite this improvement however, the overall water demands in future scenarios will still be greater than the current demands due to the expansion of the farmed area. However, these demands can be minimized if land-levelling is adopted more intensively across the entire Basin. Otherwise, there will be a need for either controlling the expansion of the rice-growing area, or increasing water availability through construction of additional reservoirs to minimize potential conflict amongst water users in the near future. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011 |
dc.date.accessioned.fl_str_mv |
2022-08-31T04:56:50Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
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http://hdl.handle.net/10183/248369 |
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1413-7895 |
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000819092 |
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http://hdl.handle.net/10183/248369 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Irriga. Botucatu. Vol. 16, n. 4 (out./dez. 2011), p. 459-475 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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