Summary
Water vapor divergences ∇.➝Q. are estimated over the Amazonas basin with radiossonde data from 1972/1975. Negative values for divergence were predominant over the basin and using the "aerological method" the mean Amazonas river discharge was estimated in 172,616m3/s; showed to be an independent method for estimatives of discharges from large basin independently of knowledge of precipitation and evapotranspiration values. The mean precipitation value estimated for 1972/1975 period was 2.328mm/year.