Precipita??o efetiva e intercepta??o das chuvas por floresta de Mata Atlantica em uma microbacia experimental em Cunha - S?o Paulo

摘要

This paper presents data obtained from one year of measurements of gross precipitation, throughfall and stemflow in a small catchment covered with Mata Atlantica, at Walter Emmerich Forest Hydrological Laboratory, in Cunha, S?o Paulo, Brazil. Throughfall and stemflow under the forest were measured with sixteen rainfall gauges and thirty eight polyurethane stemflow collectors for trees in a 400 m2 experimental plot. Precipitations in a nearby clearing were collected by one rainfall gauge. Measurements were obtained in 54 storm events. Canopy interception was estimated as precipitation minus net precipitation. Total interception, throughfall and stemflow during the period were 18.6%, 81.2% and 0.2%, respectively. Throughfall and stemflow were higher during rainy season. The percent of interception was higher during dry season.