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| Registros recuperados: 15 | |
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| Sasaki,Robson S.; Teixeira,Mauri M.; Fernandes,Haroldo C.; Zolnier,Sérgio; Maciel,Christiam F. S.; Alvarenga,Cleyton B. de. |
| ABSTRACT During pesticide spraying, the psychrometric conditions of the air may cause evaporation of the droplets along their trajectory from the nozzle to the target. Thus, this study aimed to evaluate the effect of air psychrometric conditions and operating pressure on the droplet spectrum of air-assisted boom sprayers. The test was performed using a prototype equipped with an axial fan, a flow homogenizer, temperature and relative air humidity sensors, a spray nozzle and a gas-heating system to warm up the airflow. With the assembled system and the aid of a particle analyser, the JSF 11002 spray nozzle was evaluated with respect to droplet spectrum in four air psychrometric conditions (7, 14, 21 and 28 hPa) and at four operating pressures (200, 300, 400... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evaporation; Spraying; Pesticides. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100092 |
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| LIMA NETO,IRAN E.. |
| Abstract: Field surveys and integral modelling were carried out to study the effect of bubble plumes on the flow hydrodynamics and the time-evolution of water temperature profiles in a shallow lake with maximum depth of about 4 m. Then, model simulations were performed to verify the feasibility of destratification of ten water-supply reservoirs with capacities of 10-2,000 hm3. Finally, hydrological modelling was conducted to assess the impact of destratification on evaporation suppression and its effects on reservoir yield. The results indicate that net temperature reductions of the order of 1.0°C can be obtained, which corresponds to evaporation suppressions of approximately 10%. In turn, this resulted in increases in the regulated flow of 2-12% that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aeration; Evaporation; Bubble plumes; Lakes; Stratification; Water yield. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500904 |
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| Marques,Patricia Angélica A; Bernardi Filho,Lineu; Oliveira,Ricardo B de. |
| The purpose of this experiment was to analyze the effect of five irrigation water depths on oregano production. Oregano is a plant rich in essential oil, commonly used as seasoning in food preparation. The water depths were estimated based on the class A pan evaporation (CPE): 0 CPE (without water replacement); 25 CPE, 50 CPE, 75 CPE, and 100% CPE. The analyzed variables were fresh and dry weight of leaves and roots, yield, net return, and water use efficiency. The experiment was carried out in Presidente Prudente, São Paulo State, Brazil, from February to May 2006. The best results for all the studied variables were found when 100% CPE was used. A linear positive relation was observed between water increments and fresh and dry weight of both the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Origanum vulgare L.; Evaporation; Medicinal plants; Yield; Net profit; Water use efficiency. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362009000100012 |
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| Cunha,Fernando F. da; Magalhães,Fernando F.; Castro,Marco A. de; Souza,Epitácio J. de. |
| ABSTRACT Before choosing the method of the estimate of reference evapotranspiraton (ET0) in a region, it is important to evaluate the degree of precision of the model. The present research aimed to evaluate the performance of 30 methods for daily ET0 estimate in the Cassilândia city, Brazil. The meteorological data had been obtained from the National Institute of Meteorology in the period of four years (from April, 2008 to March, 2012). As standard method it was chosen the Penman-Monteith-FAO56, and the comparison of the results was by means of the estimated standard error (ESE), the determination coefficient (R2), the coefficients “a” and “b” of the linear regressions, Willmott's index of agreement (d), Pearson's correlation coefficient (r) and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrometeorology; ET0; Evaporation; Irrigation; Penman-Monteith-FAO 56 method. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100173 |
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| Gaye, A.; Citeau, J.. |
| The atmospheric water vapor, a main climatic parameter, remains also one of the less well known in the inter tropical area. Different space programs have been carried out to improve its measure: the data provided by these experimental or operational programs, give an alternate and complementary information the model’s analysis. Moreover, the time series available today, are long enough to allow studies of variability of different climatic parameters. The following contribution, dedicated to the climate of the Western Africa, analyses the atmospheric humidity as retrieved by NOAA8/TOVS12 dated over the last 20 years. The climatology of the upper tropospheric humidity (UTH13), retrieved from HIRS-121, evidences the importance of the position and the... |
| Tipo: Report |
Palavras-chave: Climate; Noaa/Tovs; Intertropical zone of convergence; Subsidence; Satellites; SSM/I; Evaporation; Monsoons. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/571 |
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| Registros recuperados: 15 | |
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