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Author(s): Velhas, Edite
Title: A bacia hidrográfica do rio Leça : estudo hidroclimatológico
Publisher: Porto : Universidade do Porto. Faculdade de Letras
Issue Date: 1991
Abstract: In Northern Portugal, the study of streamflow characteristics in small drainage basins is made difficult due to an insufficiency or even to an absence of records on stage or discharge data. The purpose of this study was to develop and test a methodology applied to Leca river basin, which relied on the calculation of water balances through the analysis of the main climatic elements. The study of the rainfall areal variation and its monthly pattern, as well as the estimation of the potential evapotranspiration for the main weather stations in the basin, provided useful background knowledge about the atmospheric component of the hydrological cycle. Having taken into consideration landform, lithology, vegetation and land use characteristics we defined an approximate value for the soil moisture storage. The analysis of the soil moisture deficit values, obtained by a calculation procedure based upon the water balance concept, and of the other variables mentioned above, enabled us to establish the most favourable conditions for the occurrence of the greatest runoff volumes. Finally, we applied a general method for estimating rainfall intensity - duration - fequency relationships in order to calculate the flood peak flows and to map flood prone areas in the Leca river basin.
Subject: Rio Leça - Bacia hidrográfica
Bacia hidrográfica - Rio Leça
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Source: Revista da Faculdade de Letras : Geografia, 07, 1991, p.139
Document Type: Artigo em Revista Científica Nacional
Rights: openAccess
Appears in Collections:FLUP - Artigo em Revista Científica Nacional

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