Calibração do modelo matemático de infiltração de Horton em pavimento de concreto tipo blocos intertravados

Abstract

The urbanization process becomes increasingly accelerated. Urban planning associated with elements that corroborate with the design of permeable areas to avoid flood problems, it is very important. Infiltration is a complex process with many factors contributing to its rate and the determination of these factors can help us to design drainage projects more effectively. In this context, the use of interlocked concrete blocks appears as a means of contributing to increase the process of infiltration of water into the soil. The main objective of this work is to estimate the infiltration rate in interlocked concrete blocks using a singular ring and to calibrate the parameter of decay of the infiltration rate of Horton's equation. The tests were carried out in Pato Branco-PR, using the singular ring infiltrometer with a diameter of 30cm, in 9 sample points. The relationship between the Horton curve and the hietogram generated for heavy rainfall, allowed the surface runoff estimation, both with low values (6.25 mm and 27.30 mm). The mathematical model adopted was able to represent the characteristic format of the infiltration rate over time in the interlocked blocks, presenting a satisfactory minimum infiltration rate (50mm / h), although it may be overestimated due to lateral water percolation. The β values of the Horton equation presented a similar behavior in the graphs, according to their higher and lower values, varying between 1.50 and 13.05. However, the pavements analyzed presented a minimum infiltration capacity with moderate speed, collaborating with the reduction of the surface runoff, thus minimizing the peak flows.