Evaluation of net precipitation in a fragment of Mata Atlântica in different regeneration stages in the municipal district of Viçosa, MG.

Abstract

The goal of this present work was to evaluate the net precipitation in a fragment of the Mata Atlântica biome compound of semideciduous seasonal forest in different regeneration stages in Viçosa, MG, from November of 2005 to October of 2006. It was demarcated four experimental parcels, which three of them were allocated into an initial regeneration area and one into an advanced regeneration area. Gross precipitation, net precipitation and steamflow were measured in 24 storm events, constituted of one or more storm events. The mean precipitation during the studied period was 997 mm. The net precipitation on higher advanced regeneration area that has a basal area of 3.28 m², was 813.90 mm which corresponded to 81.63% of gross precipitation. The initial regeneration area, that has a basal area of 1.22 m², was 792.46 mm which corresponded to 79.43% of gross precipitation. The canopy interception was 18.37% e 20.57%, to advanced regeneration area and initial regeneration areas, respectively. The results were statistically evaluated by t-test and f-test, and showed no significant difference on 5% of probability.