Precipitação efetiva em Floresta Estacional Semidecidual na reserva Mata do Paraíso, Viçosa, Minas Gerais

• Autor(a) principal: Oliveira Junior, José Carlos de
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3054
• topic: Precipitação; Meteorologia; Ecologia florestal; Influências florestais; Rainfall; Meteorology; Forest ecology; Forest influences; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::CONSERVACAO DA NATUREZA

The forest covering influences in the redistribution of the rain water, where the tops of the trees form a system of reduction and directness of the drops that come to the soil, affecting the dynamics of the superficial drainage and the process of infiltration. In that way, the water supply is supported and the outflow variation along the year is reduced, besides the retardation of the flood picks. Some researchers affirm that the native forest, among the vegetable ecosystems, acts in the hydrolysis cycle in a more significant way, because it provides better conditions of infiltration of the rain water. The present work was led in the Station of Research, Training and Education Environmental Forest of the Paraíso, situated in the municipal district of Viçosa-MG, and it had as purpose to evaluate the effective precipitation of a more recent space of regeneration of the secondary natural forest, during the period of 2002 - 2005. For that, three portions of 20 x 20 m. were demarked with throughfall collectors and drainage for the log inside of the Forest of Paraíso, where 109 collections of the precipitation were registered, rain precipitation and throughfall, stemflow, during the period from 05/09/02 to 07/10/05, constituted of one or more rain events. The study revealed net precipitation of 1095,5 mm, throughfall of 1057,8 mm, stemflow of 37,9 mm and loss interception of 292 mm, what corresponded respectively to 79,3%, 76,7%, 2,6% and 20,7% of the rain precipitation in open that it was same to 1338,3 mm. These results show that the relation between forest covering and the pluviometric system of each area should constantly be studied and taken into account in projects of handling of hydrographical basin.