Precipitação Incidente e Fluxo de Atravessamento das Chuvas em Três Estágios Sucessionais de Floresta Atlântica no Maciço da Pedra Branca, Rio de Janeiro

Abstract

This paper presents results for gross rainfall and throughfall regimes found in three successional phases in a stand located at Caçambe sub-basin, Pedra Branca massif, Rio de Janeiro. It was carried out 27 samplings after rain events from 04/11/09 to 04/11/10. Gross rainfall and throughfall were measured with 12 rain gauges in an area of advanced secondary forest, 6 in an early secondary succession and 6 in the edge. Average throughfall was 89% in the edge, 94% in initial secondary succession and 75% in advanced secondary forest. Those values are in agreement with the values found in the literature for the Atlantic Rain Forest. Throughfall decreased simultaneously to the advance of the secondary succession. Interception results imply the importance of forest conservation in cities vulnerable to flooding such as Rio de Janeiro.