The infiltration is responsible for the water availability in the soil, and it was the main agent of the morphogenetic processes. We aimed to verify the water infiltration by estimating the rate of basic infiltration (VIB) in soils under natural vegetation regeneration conditions, in the Piraí do Sul National Forest (PR). Concentric cylinders infiltrometers were used to read the infiltrated water column every 2 hrs on three soils in the upper and middle hillside, in order to relate them to geo-ecological, and pedological conditions. VIB decreased towards the lower third of the slope, with observed values of 47.8 cm.h-1 for Oxisol, 29.6 cm.h-1, and 33.8 cm.h-1 for Inceptisol in middle slope, configuring zones of water recharge and good availability of water to the forest vegetation.
