Análise hidráulica em comportas plásticas para uso em sistemas de irrigação com politubos

Abstract

In Brazil, although agriculture plays an essential role in the country's economy, as well as a global food function, the areas of irrigated crops are not absolute, representing percentages that demonstrate the need for new investments, studies and implementations for greater performance, expansion and use of cultivars. The presente study aims to analyze the flow behavior in plastic gates in poly tubes for use in surfasse irrigation, developing an easy-to-apply methodology and discovery of base values. This study highlights the existence and effectiveness of an innovative approach, namely the use of tubes with gates, as a method of distributing water in fields irrigated by surface furrows, as well as in level dike systems, promoting both water saving, such as soil systematization, with water efficiency and precise irrigation. Through methodology carried out in the field, several solutions and difficulties were found to use this irrigation method in a practical way, however, with the discovery of satisfactory results, a new horizon for research on the topic will open up. In addition to the simple and easily replicated methodology, the creation of formulas for calculating the opening area of the gates facilitates the use of the system. Altogether, satisfactory average values were found for the coefficients (Cv. of 0.93, Cd of 0.80 and Cc. of 0.86) demonstrating that the plastic gates present acceptable performance, showing that the fluid passes efficiently and that the jet contraction is within expected limits. Creating base values for several replications of the methodology and studies on the irrigation system with polytubes gates, as well as practical use in the field.