Predictions in Ungauged Basins: Promise and Progress (Proceedings of symposium S7 held during the Seventh IAHS Scientific Assembly at Foz do Iguaçu, Brazil, April 2005). IAHS Publ. 303, 2006, 246-254.

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Hydrological modelling in Amazonia—use of the MGB-IPH model and alternative databases

ALFREDO RIBEIRO NETO¹, WALTER COLLISCHONN², RUI CARLOS VIEIRA DA SILVA¹ & CARLOS E. M. TUCCI²

1 Department of Civil Engineer/COPPE, Federal University of Rio de Janeiro, PO Box 68506, Zip Code 21945-970, Rio de Janeiro, Brazil

alfredo@coc.ufrj.br

2 Institute of Hydraulic Research, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, 9500 PO Box 15029, Zip Code 91501-970, Porto Alegre RS, Brazil

Abstract Different hydrological data sources were tested in this work. These data sources should be used in mathematical models developed for large basins. Precipitation data from the hydrometeorological network of the Brazilian National Water Agency (ANA) and from NCEP/NCAR reanalysis corrected by the Center for Ocean Land Atmosphere (COLA) were used. Climatological data from International Satellite Land Surface Climatology Project (ISLSCP) and from NCEP/NCAR reanalysis were used to calculate evapotranspiration. The Hydrological Model for Large Basins (MGB-IPH) was used to test the alternative databases from COLA/NCEP/NCAR and ISLSCP. The model was applied in the Brazilian portion of the Madeira River basin. The results showed that the daily COLA precipitation series has values very close to the ANA precipitation series for the period 1979–1990. The model simulations showed that the results are quite similar using either ANA or COLA precipitation over the period 1979–1990.

Key words Amazon basin; hydrological data; hydrological modelling

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