Modelos de infiltração da água no solo em uma área de cultivo de arroz

Abstract

The infiltration process is a major component of the water balance is also considered a factor in the consumption of water in surface irrigation. Therefore, it is necessary to find a model that describes the process of water infiltration into the soil closer to reality, considering the physical characteristics that a solo has, because knowledge of this process is of fundamental importance for the efficient management of soil and water in agricultural crops. This study aims to validate the models proposed by Kostiakov, Kostiakov-Lewis, Horton and Green-Ampt model in an area of rice cultivation. The experiment was conducted at the experimental site of Paraíso do Sul, located in the central region of Rio Grande do Sul, where soil samples were collected for physical analysis and the method used infiltrometer rings to obtain the values of cumulative infiltration.The results obtained from curves adjustments based on models Kostiakov, Kostiakov-Lewis and Horton were similar and found satisfactory, however, the Green-Ampt model in neither case has generated acceptable results for application. With the development of the work, it is concluded that, for the application of the Green-Ampt model is necessary to seek a new proposed set of parameters that can describe the process of infiltration into the soil studied.