SciELO - Scientific Electronic Library Online

 
vol.11 issue1Água como fator limitante na distribuição das minhocas (Annelida, Oligochaeta) da Amazônia Central.Estimativa da biomassa de raizes de duas espécies de Cecropia e sua relação com a associação ou não das plantas a formigas author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Acta Amazonica

Print version ISSN 0044-5967On-line version ISSN 1809-4392

Acta Amaz. vol.11 no.1 Manaus Mar. 1981

http://dx.doi.org/10.1590/1809-43921981111087 

ECOLOGIA

The water budget of an amazonian rain forest

Cari F. Jordan* 

Jochen Heuveldop**  *** 

*— Institute of Ecology. University of Georgia Athens. Georgia, U.S.A.

**— Federal Research Centre for Forestry and Forest Products. Hamburg-Reinbek.

***Federal Republic of Germany. Institute for World Forestry.

Abstract

In a tropical rain forest near San Carlos de Rio Negro, Venezuela, average yearly precipitation from September 1, 1975, through August 31, 1977 was 3664 mm. Throughfall was 87% of precipitation, stem flow was 8%, transpiration was 47%, evaporation from leaf surfaces was 5%, and sub-surface runoff was 48%. These results conform closely to the prediction of Marques et al. (1977) that 48% of the precipitation that falls on the central Amazon Basin is derived from evapotranspiration within the Basin.

Resumo

Foram feitas medições de economia do água numa floresta tropical úmida perto de San Carlos de Rio Negro (Venezuela), no período de 1 9.1975 a 31.8.1977, as quais causaram: Precipitação média anual — 3.664mm: água de lavagem das folhas — 87% de precipitação: água de escorrimento dos troncos — 8%: transpiração — 47%; evaporação das folhas — 5%; e o fluxo sub-superficial — 48%. Esses dados concordam com os de Marques et al. (1977) que afirmaram que 48% da precipitação na Amazônia Central é derivada da exapotranspiração dentro da bacia.

Texto disponível apenas em PDF

Creative Commons License  This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.