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Satellite-based ET estimation using Landsat 8 images and SEBAL model Rev. Ciênc. Agron.
Silva,Bruno Bonemberger da; Mercante,Erivelto; Boas,Marcio Antonio Vilas; Wrublack,Suzana Costa; Oldoni,Lucas Volochen.
ABSTRACT Estimation of evapotranspiration is a key factor to achieve sustainable water management in irrigated agriculture because it represents water use of crops. Satellite-based estimations provide advantages compared to direct methods as lysimeters especially when the objective is to calculate evapotranspiration at a regional scale. The present study aimed to estimate the actual evapotranspiration (ET) at a regional scale, using Landsat 8 - OLI/TIRS images and complementary data collected from a weather station. SEBAL model was used in South-West Paraná, region composed of irrigated and dry agricultural areas, native vegetation and urban areas. Five Landsat 8 images, row 223 and path 78, DOY 336/2013, 19/2014, 35/2014, 131/2014 and 195/2014 were used,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water management; Land cover; Energy balance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200221
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Uniformity microsprinkler irrigation system using statistical quality control Ciência Rural
Andrade,Maurício Guy de; Boas,Marcio Antonio Vilas; Siqueira,Jair Antonio Cruz; Sato,Mireille; Dieter,Jonathan; Hermes,Eliane; Mercante,Erivelto.
ABSTRACT: The objective of this study was to evaluate the use of statistical quality control tools in the analysis of the uniformity of a microsprinkler irrigation system. For the analysis of irrigation Christiansen uniformity coefficient (CUC) and the distribution uniformity coefficient (DU) were statistically analyzed by means of the Shewhart control charts and process capability index (Cp). For the experiment 25 tests were carried out with a single micro sprinkler and subsequently seven different spacing between micro sprinklers were simulated. Control charts contributed to the diagnosis of the treatments to be under control and with satisfactory uniformity outcomes. Increase in process capability index was directly proportional to the average of CUC...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Christiansen uniformity coefficient; Distribution uniformity coefficient; Control charts; Process capability index.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400851
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