6 documents found, page 1 of 1
IDENTIFICATION OF HOMOGENEOUS RAINFALL ZONES DURING GRAIN CROPS IN PARANÁ, BRAZIL
Lopes,Allan R.; Marcolin,Jonatas; Johann,Jerry A.; Boas,Márcio A. Vilas; Schuelter,Adilson R.ABSTRACT The aim of this study is to identify homogeneous rainfall zones in the winter and summer 1st and 2nd crops, in the state of Paraná, Brazil. The zones were defined by clustering using the expectation-maximization (EM) algorithm to transform seasonal rainfall series. Monthly average rainfall data collected from 157 weather stations for 20 years (1996 to 2015) were employed. The results show that the numb...
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, ...
Tabular cusum control charts of chemical variables applied to the control of su...
Follador,Franciele A. C.; Boas,Márcio A. Vilas; Schoenhals,Marlise; Hermes,Eliane; Rech,ClovisThe aim of this study was to evaluate the application possibility of tabular CUSUM control charts in the quality control of chemical variables in surface water. It was performed bibliographic and field research to collect water samples from 2003 to 2009, totaling 30 samples, some monthly and others semi-annual in order to observe the variables that regulate water quality. It was found that these charts may be a...
Removal of organic matter and nutrients from slaughterhouse wastewater by using...
Mees,Juliana B. R.; Gomes,Simone D.; Boas,Márcio A. Vilas; Fazolo,Ajadir; Sampaio,Sílvio C.The objective of this research was to evaluate the performance of the aquatic macrophyte Eichhornia crassipes applied in situ in a slaughter house treatment system, located in the west of the Paraná state, Brazil, regarding the nutrients removal and organic matter. Moreover, it aimed to obtain data from the production, management and composting practices of the biomass generated in the system. During 11 months ...
Equação de Hazen-Williams corrigida para água residuária proveniente da suinocu...
Sampaio,Silvio C.; Cilene,Kátia; Boas,Márcio A. Vilas; Queiroz,Manoel M. F. de; Gomes,Benedito M.; Fazolo,AjadirO objetivo do trabalho foi avaliar a perda de carga em tubulações comerciais de aço zincado, ferro galvanizado e PVC, com diferentes diâmetros, com o intuito de determinar fatores de correção para a equação de Hazen-Williams em função da concentração de sólidos totais, em águas residuárias oriundas da suinocultura. Os resultados mostraram que a perda de carga possui comportamento linear em função da concentraçã...
Lixiviação de nutrientes provenientes de águas residuárias em colunas de solo c...
Caovilla,Franciele A.; Sampaio,Silvio C.; Pereira,Joaquim O.; Boas,Márcio A. Vilas; Gomes,Benedito M.; Figueirêdo,Adriana de C.Resumo Avaliou-se a lixiviação de nutrientes em colunas de solo proveniente de área irrigada com água residuária de suinocultura, cultivada com soja. Após aplicação da respectiva água residuária, em quatro concentrações (0% - T1, 25% - T2, 50% - T3 e 75% - T4), coletaram-se amostras de solo, correspondentes aos níveis de concentração, para compor colunas em tubos de aço inox com 7,0 cm de diâmetro para os ensai...