SUMARY:The infiltration rate and hydraulic conductivity of the water in the soil are very important soil physical attributes for the study of the soil water dynamics. Management practices, often inadequate soil, can change these attributes, in some cases, allowing, the increased surface runoff and accelerating loss of soil and water, altering the natural water system balance. The values of infiltration rate are essential to the models used to describe the water infiltration into the soil and also the planning and management of irrigation systems, drainage and soil conservation and water. The models of estimation of velocity water infiltration into the soil require advanced mathematical calculations, which increases the time required to obtain results. This work aims to present the VIBK program, software developed in Matlab, which serves to facilitate and automate the adjustment infiltration curves by Horton models, Kostiakov, Kostiakov-Lews and Philip by linear regression obtained by the infiltrometers of rings, and performs statistical analysis also by the determination coefficient (R²), the hydraulic conductivity (Ko) and the basic infiltration rate (VIB).
This research was carried out in an area in the rural campus of the Federal University of Sergipe (UFS), which studies the impact of soil management changes on production and physical soil attributes during fifteen years. The area was divided into three portions, treated with no-tillage, minimum tillage and conventional tillage. The aim of this work was to compare the stable infiltration rate in a yellow red Argisol in different managements and in a succession of sweet corn and guandu as soil cover, analyzing the impact of the agricultural use and the suitability of the Horton models (1940), Kostiokov (1932), Kostiokov-Lewis (1945) and Phillip (1957). The stable infiltration rate was determined in each plot using the double concentric ring methodology. The VIBK software was used to determine the estimated values of the stable infiltration rate by the mathematics models. In order to evaluate the performance of the infiltration values obtained in the field in relation to the values calculated by the models, comparative analyzes of the results were performed statistically through the determination coefficient (R 2 ). Statistical indices were also determined, such as residual mass coefficient (RMC), coefficient of adjustment (CA) and efficiency (EF
This work was performed in an experiment that is already being done for fifteen years in the rural campus of the Federal University of Sergipe, which studies the impact of soil management changes on production and soil physical properties, the area was divided into three installments, treated with tillage, minimum tillage and conventional tillage in a succession of sweet corn and sunflower, as ground cover. The objective was to obtain the basic infiltration velocity (BIV) by double infiltrometer ring, analyze its variation in relation to the managements and the adequacy of Horton models (1940), Kostiokov (1932), Kostiokov-Lewis (1945) and Phillip (1957). As expected, the treated soil in a milder way had the best results for water infiltration rate. An excellent result was observed, the BIV reached 123 mm h -1 , and the area managed with tillage was 1.86 times higher than in conventional tillage. The model that best fit the BIV in all kinds of managements was to Horton, the BIV calculated was equal to that obtained in the field, which is easily explained by the way that the equation progresses.
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