Cartas de isoietas mensais para as bacias hidrográficas dos rios Tejo e Sado

Abstract

Key-words: Isohyet - Monthly map - Tagus river basin - Sado river basin. Presentation of the monthly isohyet map for the Tagus and Sado river basins. Isohyet lines data were plotted from 93 000 records, coIlected during a 42 year's observation period in 185 climatological stations, with the purpose of estimating the recharge of natural groundwater.