20 documents found, page 1 of 2
Annual cropland mapping using data mining and OLI Landsat-8
Oldoni,Lucas V.; Cattani,Carlos E. V.; Mercante,Erivelto; Johann,Jerry A.; Antunes,João F. G.; Almeida,LuizABSTRACT In the state of Paraná, Brazil, there are no major changes in areas cultivated with annual crops, mainly due to environmental laws that do not allow expansions to new areas. There is a great contribution of the annual crops to the domestic demand of food and economic demand in the exports. Thus, the area and distribution of annual crops are information of great importance. New methodologies, such as da...
VARIATION OF WATER QUALITY ALONG A RIVER IN AGRICULTURAL WATERSHED WITH SUPPORT...
Wrublack,Suzana C.; Mercante,Erivelto; Boas,Marcio A. Vilas; Prudente,Victor H. R.; Silva,Jefferson L. G.ABSTRACT This study demonstrates using remote sensing, geographic information systems and multivariate statistics to study water quality in an agricultural watershed. The monitoring of water quality in the watershed of Lontras's river in the southwestern region of the State of Paraná had been done in 2012 and 2013 with a multi-parameter probe in ten sites that were defined upstream and downstream watershed, dur...
ORGANOCLORATED AND ORGANOPHOSPHORUS PESTICIDES IN THE PELOTAS RIVER SEDIMENT
Model,Kathleen J.; Sampaio,Silvio C.; Remor,Marcelo B.; Mercante,Erivelto; Boas,Márcio A. VilasABSTRACT Aquatic sediments are widely used for the evaluation of anthropogenic contamination due to their ability to adsorb particles and contaminants, making them historical environmental archives. Therefore, the objective was to evaluate the contamination of the Pelotas River sediments, at the border between the states of Santa Catarina and Rio Grande do Sul, by organochlorine and organophosphorus compounds, ...
Satellite-based ET estimation using Landsat 8 images and SEBAL model
Silva,Bruno Bonemberger da; Mercante,Erivelto; Boas,Marcio Antonio Vilas; Wrublack,Suzana Costa; Oldoni,Lucas VolochenABSTRACT 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...
Uniformity microsprinkler irrigation system using statistical quality control
Andrade,Maurício Guy de; Boas,Marcio Antonio Vilas; Siqueira,Jair Antonio Cruz; Sato,Mireille; Dieter,Jonathan; Hermes,Eliane; Mercante,EriveltoABSTRACT: 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 experimen...
COMPARATIVE ASSESSMENT BETWEEN PER-PIXEL AND OBJECT-ORIENTED FOR MAPPING LAND C...
Prudente,Victor H. R.; Silva,Bruno B. da; Johann,Jerry A.; Mercante,Erivelto; Oldoni,Lucas V.ABSTRACT: The traditional per-pixel classification methods consider only spectral information, and may be limited. Object-based classifiers, however, also consider shape and texture, firstly segmenting the image, and then classifying individual objects. Thus, a Geographic Object-Based Image Analysis (GEOBIA) was compared in conjunction with data mining techniques and a traditional per-pixel method. A cut of Lan...
RESIDUE ANALYSIS OF ORGANOCHLORINE AND ORGANOPHOSPHORUS PESTICIDES IN URBAN LAK...
Cembranel,Adir S.; Frigo,Elisandro P.; Sampaio,Silvio C.; Mercante,Erivelto; Reis,Ralpho R. Dos; Remor,Marcelo B.ABSTRACT The knowledge of pesticide residual concentrations in the environment is important to understand the threats to the environment and human health, especially when natural resources are used for human consumption. In this context, this study aimed to assess the potential ecological risk and respective sources of sediment contamination by organochlorine and organophosphorus pesticides. The study site was ...
Spectral-temporal characterization of wheat cultivars through NDVI obtained by ...
Cattani,Carlos E. V.; Garcia,Murilo R.; Mercante,Erivelto; Johann,Jerry A.; Correa,Marcus M.; Oldoni,Lucas V.ABSTRACT Remote sensing applications in agriculture are presented as a very promising reality, but research is still needed for the correct use of spectral data. The objective of this study was to evaluate the spectral-temporal patterns of eleven wheat cultivars (Triticum aestivum L.). The experiment was conducted in Cascavel, PR, in the year 2014. With the help of the GreenSeeker and FieldSpec 4 terrestrial se...
Uso de imagens do sensor orbital modis na estimação de datas do ciclo de desenv...
Johann,Jerry A.; Becker,Willyan R.; Uribe-Opazo,Miguel A.; Mercante,EriveltoRESUMO O Estado do Paraná caracteriza-se por uma grande variabilidade de épocas de semeadura (DS) e, consequentemente, pelo desenvolvimento máximo vegetativo (DMDV), colheita (DC) e ciclo (CI) para a cultura da soja. O objetivo deste trabalho foi estimar essas datas para o período de primavera-verão do ano-safra de 2011/2012, por meio de séries temporais de imagens do Índice de Vegetação Realçado (do inglês Enh...
Spatial statistics applied to soybean production data from Paraná State for 200...
Prudente,Victor H. R.; Souza,Carlos H. W. de; Mercante,Erivelto; Johann,Jerry A.; Uribe-Opazo,Miguel A.In the current study, we performed a soybean production spatial distribution analysis in Paraná State. Seven crop-year data, from 2003-04 to 2009-10, obtained from the Paraná Department of Agriculture and Supply (SEAB) were used to develop a Boxmap for each crop-year, show soybean production throughout this time interval. Moran's index was used to measure spatial autocorrelation among municipalities at an aggre...