Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil

Detalhes bibliográficos
Autor(a) principal: Cunha, Gilberto Rocca da
Data de Publicação: 2010
Outros Autores: Santi, Anderson, Dalmago, Genei Antonio, Pires, João Leonardo Fernandes, Pasinato, Aldemir
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/1537
Resumo: The objective of this work was to evaluate the dynamics of rainfall pH in Passo Fundo, RS, Brazil, from 1992 to 2007. The rainfall pH was monitored in 50 mL samples collected in a 10-cm diameter PVC tube connected to a rain gauge; samples were then stored in a freezer for later determination of pH. The dynamics of rain water pH was evaluated through the annual and monthly averages of the pH, the empirical probability of pH values distributed over the seasons, and the pH accumulated relative frequency. The rainfall events in Passo Fundo region have pH higher than the critical threshold (pH 5.6) to be considered acid rain. The analysis of a 16-year period showed reduction of the rainfall pH at 0.023 per year. Over that period, the average pH fell from 6.1 to 5.8. The rainfalls were slightly more acidic in the summer and spring than in the autumn and winter. In general, the analysis of rainfall events in the region showed no immediate risk of environmental acidification.
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spelling Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, BrazilDinâmica do pH da água das chuvas em Passo Fundo, RSacid rain; environmental index; sustainability; water qualitychuva ácida; indicador ambiental; qualidade de água; sustentabilidadeThe objective of this work was to evaluate the dynamics of rainfall pH in Passo Fundo, RS, Brazil, from 1992 to 2007. The rainfall pH was monitored in 50 mL samples collected in a 10-cm diameter PVC tube connected to a rain gauge; samples were then stored in a freezer for later determination of pH. The dynamics of rain water pH was evaluated through the annual and monthly averages of the pH, the empirical probability of pH values distributed over the seasons, and the pH accumulated relative frequency. The rainfall events in Passo Fundo region have pH higher than the critical threshold (pH 5.6) to be considered acid rain. The analysis of a 16-year period showed reduction of the rainfall pH at 0.023 per year. Over that period, the average pH fell from 6.1 to 5.8. The rainfalls were slightly more acidic in the summer and spring than in the autumn and winter. In general, the analysis of rainfall events in the region showed no immediate risk of environmental acidification.O objetivo deste trabalho foi avaliar a dinâmica do pH da água das chuvas em Passo Fundo, RS, de 1992 a 2007. A água foi coletada em recipiente de PVC (diâmetro de 10 cm) acoplado a um pluviômetro, e as amostras foram armazenadas em congelador para posterior determinação do pH. A dinâmica do pH da água foi avaliada por meio das médias mensais e anuais do pH, da probabilidade empírica da distribuição dos valores anuais de pH por estação do ano e da frequência relativa acumulada do pH. A água das chuvas incidentes na região de Passo Fundo apresentou pH acima de 5,6, que é o limite para que a chuva seja considerada ácida. A análise do período de 16 anos indicou tendência de redução do pH da água das chuvas em 0,023 ao ano. Nesse período, a redução foi de 6,1 para 5,8. As chuvas foram ligeiramente mais ácidas no verão e na primavera do que no outono e no inverno. Em geral, as chuvas incidentes na região não apresentaram riscos imediatos de acidificação ambiental.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCunha, Gilberto Rocca daSanti, AndersonDalmago, Genei AntonioPires, João Leonardo FernandesPasinato, Aldemir2010-11-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/1537Pesquisa Agropecuaria Brasileira; v.44, n.4, abr. 2009; 339-346Pesquisa Agropecuária Brasileira; v.44, n.4, abr. 2009; 339-3461678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/1537/5685https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/1537/1021info:eu-repo/semantics/openAccess2012-06-17T11:48:30Zoai:ojs.seer.sct.embrapa.br:article/1537Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-06-17T11:48:30Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
Dinâmica do pH da água das chuvas em Passo Fundo, RS
title Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
spellingShingle Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
Cunha, Gilberto Rocca da
acid rain; environmental index; sustainability; water quality
chuva ácida; indicador ambiental; qualidade de água; sustentabilidade
title_short Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
title_full Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
title_fullStr Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
title_full_unstemmed Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
title_sort Dynamics of rainfall pH in Passo Fundo, Rio Grande do Sul, Brazil
author Cunha, Gilberto Rocca da
author_facet Cunha, Gilberto Rocca da
Santi, Anderson
Dalmago, Genei Antonio
Pires, João Leonardo Fernandes
Pasinato, Aldemir
author_role author
author2 Santi, Anderson
Dalmago, Genei Antonio
Pires, João Leonardo Fernandes
Pasinato, Aldemir
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Cunha, Gilberto Rocca da
Santi, Anderson
Dalmago, Genei Antonio
Pires, João Leonardo Fernandes
Pasinato, Aldemir
dc.subject.por.fl_str_mv acid rain; environmental index; sustainability; water quality
chuva ácida; indicador ambiental; qualidade de água; sustentabilidade
topic acid rain; environmental index; sustainability; water quality
chuva ácida; indicador ambiental; qualidade de água; sustentabilidade
description The objective of this work was to evaluate the dynamics of rainfall pH in Passo Fundo, RS, Brazil, from 1992 to 2007. The rainfall pH was monitored in 50 mL samples collected in a 10-cm diameter PVC tube connected to a rain gauge; samples were then stored in a freezer for later determination of pH. The dynamics of rain water pH was evaluated through the annual and monthly averages of the pH, the empirical probability of pH values distributed over the seasons, and the pH accumulated relative frequency. The rainfall events in Passo Fundo region have pH higher than the critical threshold (pH 5.6) to be considered acid rain. The analysis of a 16-year period showed reduction of the rainfall pH at 0.023 per year. Over that period, the average pH fell from 6.1 to 5.8. The rainfalls were slightly more acidic in the summer and spring than in the autumn and winter. In general, the analysis of rainfall events in the region showed no immediate risk of environmental acidification.
publishDate 2010
dc.date.none.fl_str_mv 2010-11-10
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/1537
url https://seer.sct.embrapa.br/index.php/pab/article/view/1537
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/1537/5685
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/1537/1021
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 Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.44, n.4, abr. 2009; 339-346
Pesquisa Agropecuária Brasileira; v.44, n.4, abr. 2009; 339-346
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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