Assessing economic impacts of deficit irrigation as related to water productivity and water costs

Detalhes bibliográficos
Autor(a) principal: Rodrigues, Gonçalo C.
Data de Publicação: 2009
Outros Autores: Pereira, L.S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/8093
Resumo: Research Paper: SW - soil and Water
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spelling Assessing economic impacts of deficit irrigation as related to water productivity and water costsdeficit irrigationwater productivitywater costsResearch Paper: SW - soil and WaterThis study aims at assessing the feasibility of deficit irrigation of maize, wheat and sunflower through an analysis of the economic water productivity (EWP). It focuses on selected sprinkler-irrigated fields in Vigia Irrigation District, Southern Portugal. Various scenarios of water deficits and water availability were considered. Simulations were performed for average, high and very high climatic demand. The potential crop yields were estimated from regional climatic data and local information. Using field collected data on yield values, production costs, water costs, commodity prices and irrigation performance, indicators on EWP were calculated. Results show that a main bottleneck for adopting deficit irrigation is the presently low performance of the irrigation systems used in the considered fields, which leads to high water use and low EWP. Decreasing water use through deficit irrigation also decreases the EWP. Limited water deficits for maize are likely to be viable when the irrigation performance is improved if water prices do not increase much, and the commodity price does not return to former low levels. The sunflower crop, despite lower sensitivity to water deficits than maize, does not appear to be a viable solution to replace maize when water restrictions are high; however it becomes an attractive crop if recently high commodity prices are maintained. With improved irrigation performance, wheat deficit irrigation is viable including when full water costs are applied, if former low prices are not returned to. However, under drought conditions full water costs are excessive. Thus, adopting deficit irrigation requires not only an appropriate irrigation scheduling but higher irrigation performance, and that the application of a water prices policy would be flexible, thus favouring the improvement of the irrigation systemsElsevierRepositório da Universidade de LisboaRodrigues, Gonçalo C.Pereira, L.S.2015-03-05T10:16:41Z20092009-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/8093eng"Biosystems Engineering". ISSN 1573-5110. 103 (2009) 536-55110.1016/j.biosystemseng.2009.05.002info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:38:45ZPortal AgregadorONG
dc.title.none.fl_str_mv Assessing economic impacts of deficit irrigation as related to water productivity and water costs
title Assessing economic impacts of deficit irrigation as related to water productivity and water costs
spellingShingle Assessing economic impacts of deficit irrigation as related to water productivity and water costs
Rodrigues, Gonçalo C.
deficit irrigation
water productivity
water costs
title_short Assessing economic impacts of deficit irrigation as related to water productivity and water costs
title_full Assessing economic impacts of deficit irrigation as related to water productivity and water costs
title_fullStr Assessing economic impacts of deficit irrigation as related to water productivity and water costs
title_full_unstemmed Assessing economic impacts of deficit irrigation as related to water productivity and water costs
title_sort Assessing economic impacts of deficit irrigation as related to water productivity and water costs
author Rodrigues, Gonçalo C.
author_facet Rodrigues, Gonçalo C.
Pereira, L.S.
author_role author
author2 Pereira, L.S.
author2_role author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Rodrigues, Gonçalo C.
Pereira, L.S.
dc.subject.por.fl_str_mv deficit irrigation
water productivity
water costs
topic deficit irrigation
water productivity
water costs
description Research Paper: SW - soil and Water
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-01-01T00:00:00Z
2015-03-05T10:16:41Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/8093
url http://hdl.handle.net/10400.5/8093
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Biosystems Engineering". ISSN 1573-5110. 103 (2009) 536-551
10.1016/j.biosystemseng.2009.05.002
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv
repository.mail.fl_str_mv
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