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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
14/05/1996 |
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Data da última atualização: |
14/05/1996 |
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Autoria: |
FRAZIER, B. E.; McCOOL, D. K. |
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Título: |
Aerial photography to detect rill erosion. |
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Ano de publicação: |
1981 |
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Fonte/Imprenta: |
Transactions of the Asae, p.1168-1176, 1981. |
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Idioma: |
Inglês |
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Conteúdo: |
Color and color-infrared (CIR) air photo transparencies were investigated as a means of gathering data necessary to assess erosion. An eroded hillside was photographed at three scales to determine the size of erosion features that were detectable and the effect of surface conditions on the interpretation. Implement patterns from chisel plowing, harrowing, double-disk drilling, and combining were visible to the naked eye on 1:4.000 scale images. All except the harrowing pattern were also visible on 1: 8.000 scale images. The most common erosion feature, rills, was measurable at a minimum width of 38mm (ground distance) on 1:2.000 scale CIR imagery with a 50X pocket microscope. The number of rills seen depended on scale, interpreter-film type combination, soilsurface wetness, plant cover, and viewing instrument. the best viewinginstrument was a variable power stereoscope. The best result, 85 percent of ground-measured rill, was obtained with 1:2.000 scale CIR film exposed over a dry surface soil. Color and CIR aerial photographs can yield sufficient detail to rank eroding areas according to rill densityand width. They are expected to be a useful tool for erosion quantification in the Palouse region of the Pacific northwest. |
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Palavras-Chave: |
Erosion. |
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Thesagro: |
Erosão; Solo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01672naa a2200181 a 4500
001 1077072
005 1996-05-14
008 1981 bl --- 0-- u #d
100 1 $aFRAZIER, B. E.
245 $aAerial photography to detect rill erosion.
260 $c1981
520 $aColor and color-infrared (CIR) air photo transparencies were investigated as a means of gathering data necessary to assess erosion. An eroded hillside was photographed at three scales to determine the size of erosion features that were detectable and the effect of surface conditions on the interpretation. Implement patterns from chisel plowing, harrowing, double-disk drilling, and combining were visible to the naked eye on 1:4.000 scale images. All except the harrowing pattern were also visible on 1: 8.000 scale images. The most common erosion feature, rills, was measurable at a minimum width of 38mm (ground distance) on 1:2.000 scale CIR imagery with a 50X pocket microscope. The number of rills seen depended on scale, interpreter-film type combination, soilsurface wetness, plant cover, and viewing instrument. the best viewinginstrument was a variable power stereoscope. The best result, 85 percent of ground-measured rill, was obtained with 1:2.000 scale CIR film exposed over a dry surface soil. Color and CIR aerial photographs can yield sufficient detail to rank eroding areas according to rill densityand width. They are expected to be a useful tool for erosion quantification in the Palouse region of the Pacific northwest.
650 $asoil
650 $aErosão
650 $aSolo
653 $aErosion
700 1 $aMcCOOL, D. K.
773 $tTransactions of the Asae, p.1168-1176, 1981.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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