simulação da deriva de agrotóxicos em diferentes condições de pulverização pesticide drift simulation under different spray conditions
Clicks: 190
ID: 195839
2008
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Abstract
A deriva nas aplicações de agrotóxicos é considerada um dos maiores problemas da agricultura. Entre os fatores que a influenciam, o tamanho das gotas pulverizadas e a velocidade do vento têm-se mostrado primordiais. Objetivou-se, no presente trabalho, determinar a distância horizontal teórica percorrida por gotas de tamanho conhecido, submetidas a diferentes alturas de lançamento e velocidades do vento. Utilizando-se de equações clássicas da mecânica dos fluidos e da metodologia de superfície de resposta, determinou-se a distância que as gotas podem ser arrastadas quando liberadas de alturas variadas, em função do tamanho das gotas pulverizadas, da densidade do líquido e da velocidade horizontal. A análise dos dados permitiu estimar a distância horizontal percorrida por gotas de pulverização, em diversas condições de lançamento, estando os resultados simulados altamente correlacionados com o diâmetro das gotas e com a velocidade de deslocamento horizontal. Nas condições avaliadas, a distância horizontal máxima percorrida pelas gotas foi inferior a 40 m.
Pesticide spray drift is a major problem in agriculture today. Among the factors affecting drift, droplet size and wind velocity are of paramount importance. Thus, this work aimed to evaluate the theoretical horizontal distance traveled by droplets of known size, subjected to different discharge heights and wind velocities. Using traditional equations of Fluid Mechanics and response surface methodology, the distance traveled by droplets discharged from different heights was determined by droplet size, liquid density and wind velocity. Data analysis allowed to simulate the horizontal distance traveled by droplets in several discharge conditions. Drift has shown to be highly related to droplet diameter and wind velocity. In the simulated conditions, the maximum horizontal distance traveled by droplets was less than 40 m.
Pesticide spray drift is a major problem in agriculture today. Among the factors affecting drift, droplet size and wind velocity are of paramount importance. Thus, this work aimed to evaluate the theoretical horizontal distance traveled by droplets of known size, subjected to different discharge heights and wind velocities. Using traditional equations of Fluid Mechanics and response surface methodology, the distance traveled by droplets discharged from different heights was determined by droplet size, liquid density and wind velocity. Data analysis allowed to simulate the horizontal distance traveled by droplets in several discharge conditions. Drift has shown to be highly related to droplet diameter and wind velocity. In the simulated conditions, the maximum horizontal distance traveled by droplets was less than 40 m.
| Reference Key |
cunha2008cinciasimulao
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|---|---|
| Authors | ;João Paulo Arantes Rodrigues da Cunha |
| Journal | information and software technology |
| Year | 2008 |
| DOI |
10.1590/S1413-70542008000500039
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| URL | |
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