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Title: Real evapotranspiration and transpiration through a tropical rain forest in central Amazonia as estimated by the water balance method
Authors: Leopoldo, Paulo Rodolfo
Franken, Wolfram Karl
Villa-Nova, Nilson Augusto
Issue Date: 1995
metadata.dc.publisher.journal: Forest Ecology and Management
metadata.dc.relation.ispartof: Volume 73, Número 1-3, Pags. 185-195
Abstract: The research was carried out from January 1981 to December 1983, in a small watershed of 1.3 km2 surface area located at INPA's Ducke Forest Reserve. This watershed is drained by the Barro-Branco stream, and its vegetation cover is characterized by a typical tropical rain forest of the central Amazon region. In order to estimate its real evapotranspiration, transpiration and other hydrological parameters, the precipitation and the discharge yielded by the Barro-Branco stream were measured during the experimental period. A mean precipitation of 2209 mm year-1 was recorded, from which 67.6% was lost to the atmosphere through evapotranspiration. This result was similar to that calculated by the modified Penman's method (1479.2 mm year-1). If the average rain water interception by the forest canopy is assumed to be 11.3% of the total precipitation amount, as estimated by Gash's model, the transpiration was 1243.7 mm year-1, representing 56.3% of the total rainfall observed for the 1981-1983 period. © 1995.
metadata.dc.identifier.doi: 10.1016/0378-1127(94)03487-H
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