Teste de infiltrômetros simplificados para determinação da infiltração de água no solo

Abstract

In the process of infiltration of water into the soil, the infiltration velocity tends to decrease with the passage of time, stabilizing from the moment the soil enters the state of saturation. This process is directly influenced by soil surface conditions and their chemical, physical and biological attributes. The objective of the present study was to test, evaluate and compare the efficiency of two polyvinyl polyvinyl chloride (PVC) infiltraters in three systems of use, natural forest, no - tillage, and conventional planting. In each system of use, a plot of 700 m2 was delimited, randomly, to carry out soil water infiltration tests. The simple infiltrator of Mariotte was able to differentiate well the effects of land uses at the rate of basic infiltration (VIB) in the evaluated systems. In general, the equipment is easy to handle and has the advantage of low water consumption per sampling point. The results showed that the equipment was able to ascertain the differences between the systems of use analyzed, but with different amplitudes.