|
|
|
|
|
| Cardoso,Célio Orli; Bertol,Idelgardis; Soccol,Olívio José; Sampaio,Carlos Augusto de Paiva. |
| The objective of this work was to analyze the frequency distribution and intensity temporal variability of intense rainfall for Lages/SC from diary pluviograph data. Data on annual series of maximum rainfalls from rain gauges of the CAV-UDESC Weather Station in Lages/SC were used from 2000 to 2009. Gumbel statistic distribution was applied in order to obtain the rainfall height and intensity in the following return periods: 2, 5, 10, 15 and 20 years. Results showed intensity-duration-frequency curves (I-D-F) for those return periods, as well as I-D-F equations: i=2050.Tr0,20.(t+30)-0,89, where i was the intensity, Tr was the rainfall return periods and t was the rainfall duration. For the intensity of temporal variability pattern along of the rainfall... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maximum rainfall; I-D-F curves; Gumbel distribution; Intensity rainfall. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200017 |
| |
|
| |
|
|
| Soccol,Olívio José; Rodrigues,Lineu Neiva; Botrel,Tarlei Arriel; Ullmann,Mario Nestor. |
| The objective of this work was to evaluate the efficiency of a hydrocyclone to separate sand in irrigation water. To do this, it an experiment was conducted where the hydrocyclone was operated with pressures and discharge that varied from 10 to 60 kPa and from 1,159.90 L h-1 to 2,603.60 L h-1, respectively. During the tests, the sand concentration in suspension varied from 2.81 g L-1 to 7.01 g L-1. The results showed that the best efficiency was obtained with pressure differentials of 10 and 30 kPa, with cut size (d70) of 50 µm. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water quality; Pre-filters; Efficiency. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200003 |
| |
|
|
| Cardoso,Célio Orli; Soccol,Olívio José. |
| This work had the objective to investigate the delay effects in the sowing date on corn establishment, cycle duration and yield through the computer simulations using CERES-Maize model, in order to help agrarian producers from the Mountainous Area of Santa Catarina, Brazil to take better decisions on it. The computer simulations showed that: 1)the risks on corn establishment increased due to the delay of sowing during the studied years; 2) in some years, its cycles were drastically affected for the lower temperatures; 3) the cycle durations were longer when confronted with the low temperatures; 4) corn income decreased when the cycles were confronted with the low temperatures, water deficiency and low solar radiation; 5) potential incomes averaged 4944 kg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Simulation; Mathematical Model; Sowing date. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400002 |
| |
|
|
| Soccol,Olívio José; Ullmann,Mario Nestor; Frizzone,José Antônio. |
| Studies were carried out to evaluate the "xique-xique" irrigation system of a trickle irrigated subunit. Initial results showed that the system's performance was average, any Emission Uniformity, Statistical Uniformity and Coefficient of Global Variation were 74.51, 77.69, and 22.31%, respectively. The efficiency parameters were below expectations, and values of Application Efficiency (Ae), Storage Efficiency (Se), Deep Percolation (Dp), Deficit Degree (DD) and Adequacy Degree (a) were 100, 47.83, 0, 52.17 and 0% respectively. By adopting new management procedures, it was possible to improve the system's efficiency, reaching values of 90.20, 91.68, 9.80, 8.32 and 52.87% for Ae, Se, Dp, DD and "a", respectively. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Efficiency; Uniformity. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600017 |
| |
|
|
| Soccol,Olívio José; Botrel,Tarlei Arriel. |
| The use of water containing suspended sediments causes serious problems to irrigation systems. Choosing the right filtering system type and capacity is essential to avoid increases in operational and maintenance costs of irrigation resulting from the need for cleaning and frequent component replacing. Pre-filters, such as the hydrocyclone, are important for their significant capability of retaining particles suspended in the water. Data on hydrocyclones performance for pre-filtering of irrigation water can be found in the literature, but research data in Brazil are scarce. Therefore, four Rietema type hydrocyclones (50 mm diameter) were constructed, one with circular-end and the other three presenting rectangular-end feeding tubes. The evaluation of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Filtration; Cyclones; Centrifugal separator. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200002 |
| |
|
|
|
