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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental; Embrapa Semiárido; Embrapa Solos. |
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Data corrente: |
03/11/1993 |
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Data da última atualização: |
22/11/2002 |
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Autoria: |
LOMBARDI NETO, F. |
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Título: |
Rainfall erosivity - its distribution and relationship with soil loss at Campinas, Brazil. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
s.l.: Purdue University, 1977. |
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Páginas: |
53p. |
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Idioma: |
Inglês |
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Notas: |
Tese Mestrado. |
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Conteúdo: |
The rainfall erosion potential for invidual storms was calculated for Campinas, Sao paulo State, Brazil. The erosion potential of a rainstorm is the product of the rainfall energy and the maximum 30-minute intensity of the storm. Over a 22 year period the average annual erosion index computed by addint the EI values of storms greater than 10 millimeter was 690 (values range from 351 to 1410). Monthly and seasonal distributions fo the erosion index were established. The data showed that 62% of the annual erosion potential occurs during the months of December to February. The frequency distribution of the total annual and maximum annual individual storm erosion index was skewed, but the logarithms of the data appeared to be normally distributed. Expected average monthly and annual values of erosion potential may be readily estimated from local rainfall amount records by the equation EI = 6.872 (p 2/p)0.850. A high correlation was found between actual and estimated EI values. The estimates of average erosion losses over an extended period of erosion index values are sufficiently accurate to serve as a sound basis for conservation planning. |
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Palavras-Chave: |
Brasil; Campinas; Erosivity; Loss; Potencial Chuva pesada; Rainfall; Sao Paulo; Solos. |
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Thesagro: |
Chuva; Erosão; Erosão Hídrica; Solo. |
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Thesaurus Nal: |
soil; water erosion. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01890nam a2200301 a 4500
001 1331103
005 2002-11-22
008 1977 bl uuuu m 00u1 u #d
100 1 $aLOMBARDI NETO, F.
245 $aRainfall erosivity - its distribution and relationship with soil loss at Campinas, Brazil.
260 $as.l.: Purdue University$c1977
300 $a53p.
500 $aTese Mestrado.
520 $aThe rainfall erosion potential for invidual storms was calculated for Campinas, Sao paulo State, Brazil. The erosion potential of a rainstorm is the product of the rainfall energy and the maximum 30-minute intensity of the storm. Over a 22 year period the average annual erosion index computed by addint the EI values of storms greater than 10 millimeter was 690 (values range from 351 to 1410). Monthly and seasonal distributions fo the erosion index were established. The data showed that 62% of the annual erosion potential occurs during the months of December to February. The frequency distribution of the total annual and maximum annual individual storm erosion index was skewed, but the logarithms of the data appeared to be normally distributed. Expected average monthly and annual values of erosion potential may be readily estimated from local rainfall amount records by the equation EI = 6.872 (p 2/p)0.850. A high correlation was found between actual and estimated EI values. The estimates of average erosion losses over an extended period of erosion index values are sufficiently accurate to serve as a sound basis for conservation planning.
650 $asoil
650 $awater erosion
650 $aChuva
650 $aErosão
650 $aErosão Hídrica
650 $aSolo
653 $aBrasil
653 $aCampinas
653 $aErosivity
653 $aLoss
653 $aPotencial Chuva pesada
653 $aRainfall
653 $aSao Paulo
653 $aSolos
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Registro original: |
Embrapa Solos (CNPS) |
