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Relationship between remote sensing data and field-observed interril erosion PAB
Moraes,André Geraldo de Lima; Carvalho,Daniel Fonseca de; Antunes,Mauro Antonio Homem; Ceddia,Marcos Bacis.
Abstract: The objective of this work was to evaluate the relationship between different remote sensing data, derived from satellite images, and interrill soil losses obtained in the field by using a portable rainfall simulator. The study was carried out in an area of a hydrographic basin, located in Médio Paraíba do Sul, in the state of Rio de Janeiro - one of the regions most affected by water erosion in Brazil. Evaluations were performed for different vegetation indices (NDVI, Savi, EVI, and EVI2) and fraction images (FI), derived from linear spectral mixture analysis (LSMA), obtained from RapidEye, Sentinel2A, and Landsat 8 OLI images. Vegetation indices are more adequate to predict soil loss than FI, highlighting EVI2, whose exponential model showed R2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Linear spectral mixing analysis; Rainfall simulator; Vegetation indices.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000300332
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Water erosion and soil water infiltration in different stages of corn development and tillage systems AGRIAMBI
Carvalho,Daniel F. de; Eduardo,Eliete N.; Almeida,Wilk S. de; Santos,Lucas A. F.; Alves Sobrinho,Teodorico.
ABSTRACTThis study evaluated soil and water losses, soil water infiltration and infiltration rate models in soil tillage systems and corn (Zea mays, L.) development stages under simulated rainfall. The treatments were: cultivation along contour lines, cultivation down the slope and exposed soil. Soil losses and infiltration in each treatment were quantified for rains applied using a portable simulator, at 0, 30, 60 and 75 days after planting. Infiltration rates were estimated using the models of Kostiakov-Lewis, Horton and Philip. Based on the obtained results, the combination of effects between soil tillage system and corn development stages reduces soil and water losses. The contour tillage system promoted improvements in soil physical properties,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil loss; Infiltration rate; Soil tillage; Rainfall simulator.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101072
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Water infiltration in an ultisol after cultivation of common bean Rev. Bras. Ciênc. Solo
Santos,Maria Aparecida do Nascimento dos; Panachuki,Elói; Alves Sobrinho,Teodorico; Oliveira,Paulo Tarso Sanches de; Rodrigues,Dulce Buchala Bicca.
Water infiltration in the soil is an important hydrological process that occurs at the interface of the soil-atmosphere system; thus, the soil management practice used has a strong influence on this process. The aim of this study was to evaluate water infiltration in the soil and compare equations for estimating the water infiltration rate in an Ultisol after harvesting common bean (Phaseolus vulgaris L.) under simulated rainfall. Field tests with a rainfall simulator were carried out in three soil management systems: minimum tillage (MT), conventional tillage (CT), and no tillage (NT). In NT, four levels of plant residue on the soil surface were evaluated: 0, 3, 6, and 9 t ha-1. The models of Kostiakov-Lewis, Horton, and Philip were used to estimate the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Runoff; Soil management; Rainfall simulator.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500026
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