SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Gaúcha (Online) |
Texto Completo: | http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/548 |
Resumo: | Knowing the amount and size-distribution of sediments transported in the runoff water is important for bota erosion studies and farm planning. The effect of type and amount of crop residues, mulch cover, surface roughness, and runoff rate on the size-distribution of eroded sediments, as evaluated by the 13 50 index, was investigated in a field study using simulated rainfall, in Eldorado do Sul-RS, Brazil, during the period of 1992 to 1994. The soil used in the experiment was a red-yellow podzolic, clay loam in texture, with 0.066 m/m slope. Treatments consisted of no-till, chisel plow, and plow-and- disk all of them in the presence and absence of cornstalk and wheat straw. The D50 index increased with runoff discharge up to a given size of eroded sediments and decreased thereafter, regardless of mulch cover and surface roughness. This was explained in terms of amount of sediments readily available for transport and in terms of available runoff energy to deteach new sediments. For a given runoff rate, the 13 55 index values decreased with mulch cover and surface roughness. |
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SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE SEDIMENTOS TRANSPORTADOS PELA ENXURRADA RELACIONADOS À COBERTURA E RUGOSIDADE SUPERFICIAL DO SOLO E TAXA DE DESCARGAsou erosion, D50 index for eroded sediments, mulch cover, runoff rate.Erosão do solo, índice D,0,cobertura do solo, taxa de descarga.Knowing the amount and size-distribution of sediments transported in the runoff water is important for bota erosion studies and farm planning. The effect of type and amount of crop residues, mulch cover, surface roughness, and runoff rate on the size-distribution of eroded sediments, as evaluated by the 13 50 index, was investigated in a field study using simulated rainfall, in Eldorado do Sul-RS, Brazil, during the period of 1992 to 1994. The soil used in the experiment was a red-yellow podzolic, clay loam in texture, with 0.066 m/m slope. Treatments consisted of no-till, chisel plow, and plow-and- disk all of them in the presence and absence of cornstalk and wheat straw. The D50 index increased with runoff discharge up to a given size of eroded sediments and decreased thereafter, regardless of mulch cover and surface roughness. This was explained in terms of amount of sediments readily available for transport and in terms of available runoff energy to deteach new sediments. For a given runoff rate, the 13 55 index values decreased with mulch cover and surface roughness. O conhecimento da quantidade e distribuição de tamanho dos sedimentos disponíveis ao transporte pela enxurrada, influenciados pelo cultivo do solo, é importante no planejamento conservacionista. O efeito do tipo e quantidade de resíduos culturais, cobertura e rugosidade superficial do solo e taxa de descarga, sobre a velocidade da enxurrada e distribuição de tamanho dos sedimentos erodidos, foi avaliado no campo sob chuva simulada entre 1992 e 1994. Utilizou-se um solo podzólico vermelho amarelo, com declividade média de 0,066 mim, em Eldorado do Sul (RS). Os tratamentos consistiram de semeadura direta, escarificação e aração+gradagem, na presença e ausência de resíduos culturais de milho e trigo. O índice D 50 aumentou com o aumento da taxa de descarga, até determinado valor de tamanho dos sedimentos, diminuindo após esse tamanho, independente da cobertura e rugosidade do solo. Isto ocorreu porque quando todos os sedimentos previamente separados da massa do solo já haviam sido transportados, a enxurrada teve que dispender parte da energia para a separação e transporte de novos sedimentos, o que fez com que diminuísse o diâmetro médio dos novos sedimentos presentes no fluxo. Para uma dada taxa de descarga, os valores de D so diminuíram com o aumento da cobertura e rugosidade. Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural1997-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/548Pesquisa Agropecuária Gaúcha; Vol 3 No 2 (1997): PESQ. AGROP. GAÚCHA; 199-206Pesquisa Agropecuária Gaúcha; v. 3 n. 2 (1997): PESQ. AGROP. GAÚCHA; 199-2062595-76860104-9070reponame:Pesquisa Agropecuária Gaúcha (Online)instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulinstacron:SEAPDRporhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/548/504BERTOL, ILDEGARDIS COGO, NEROLI PEDRO MIQUELLUTI, DAVID JOSÉ info:eu-repo/semantics/openAccess2024-04-22T12:03:22Zoai:ojs.revistapag.agricultura.rs.gov.br:article/548Revistahttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapagPUBhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/oaipag@agricultura.rs.gov.br||2595-76860104-9070opendoar:2024-04-22T12:03:22Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse |
dc.title.none.fl_str_mv |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE SEDIMENTOS TRANSPORTADOS PELA ENXURRADA RELACIONADOS À COBERTURA E RUGOSIDADE SUPERFICIAL DO SOLO E TAXA DE DESCARGA |
title |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE |
spellingShingle |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE BERTOL, ILDEGARDIS sou erosion, D50 index for eroded sediments, mulch cover, runoff rate. Erosão do solo, índice D,0,cobertura do solo, taxa de descarga. |
title_short |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE |
title_full |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE |
title_fullStr |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE |
title_full_unstemmed |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE |
title_sort |
SIZE-DISTRIBUTION OF ERODED SEDIMENTS IN THE RUNOFF WATER AS AFFECTED BY RESIDUE MULCH, SURFACE ROUGHNESS, AND DISCHARGE RATE |
author |
BERTOL, ILDEGARDIS |
author_facet |
BERTOL, ILDEGARDIS COGO, NEROLI PEDRO MIQUELLUTI, DAVID JOSÉ |
author_role |
author |
author2 |
COGO, NEROLI PEDRO MIQUELLUTI, DAVID JOSÉ |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
BERTOL, ILDEGARDIS COGO, NEROLI PEDRO MIQUELLUTI, DAVID JOSÉ |
dc.subject.por.fl_str_mv |
sou erosion, D50 index for eroded sediments, mulch cover, runoff rate. Erosão do solo, índice D,0,cobertura do solo, taxa de descarga. |
topic |
sou erosion, D50 index for eroded sediments, mulch cover, runoff rate. Erosão do solo, índice D,0,cobertura do solo, taxa de descarga. |
description |
Knowing the amount and size-distribution of sediments transported in the runoff water is important for bota erosion studies and farm planning. The effect of type and amount of crop residues, mulch cover, surface roughness, and runoff rate on the size-distribution of eroded sediments, as evaluated by the 13 50 index, was investigated in a field study using simulated rainfall, in Eldorado do Sul-RS, Brazil, during the period of 1992 to 1994. The soil used in the experiment was a red-yellow podzolic, clay loam in texture, with 0.066 m/m slope. Treatments consisted of no-till, chisel plow, and plow-and- disk all of them in the presence and absence of cornstalk and wheat straw. The D50 index increased with runoff discharge up to a given size of eroded sediments and decreased thereafter, regardless of mulch cover and surface roughness. This was explained in terms of amount of sediments readily available for transport and in terms of available runoff energy to deteach new sediments. For a given runoff rate, the 13 55 index values decreased with mulch cover and surface roughness. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-12-30 |
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 |
http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/548 |
url |
http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/548 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/548/504 |
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 |
Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural |
publisher.none.fl_str_mv |
Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural |
dc.source.none.fl_str_mv |
Pesquisa Agropecuária Gaúcha; Vol 3 No 2 (1997): PESQ. AGROP. GAÚCHA; 199-206 Pesquisa Agropecuária Gaúcha; v. 3 n. 2 (1997): PESQ. AGROP. GAÚCHA; 199-206 2595-7686 0104-9070 reponame:Pesquisa Agropecuária Gaúcha (Online) instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul instacron:SEAPDR |
instname_str |
Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul |
instacron_str |
SEAPDR |
institution |
SEAPDR |
reponame_str |
Pesquisa Agropecuária Gaúcha (Online) |
collection |
Pesquisa Agropecuária Gaúcha (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul |
repository.mail.fl_str_mv |
pag@agricultura.rs.gov.br|| |
_version_ |
1797068773770919936 |