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A new approach to rainfall-runoff global modeling, the DPFT method, is presented. Using a rainfallrunoff multi-event sample and an iterative algorithm, the average Unit Hydrograph (Transfer Function) of the watershed and an effective rainfall series, associated with each event, are simultaneously identified. This last particular item is the main advantage of the method, and allows the later calibration of different Loss-Function models, relating the measured observed rainfall, to the effective rainfall, calculated by means of the DPFT method. A study case is presented, referring to the application of the method to Serra Azul watershed (109 km), considered as a representative region in the State of Minas Gerais Brazil. The Transfer Function obtained is compared with other methods and shows robust and stable results. The effective rainfalls obtained are consistent. For each rainfall-runoff event, using the observed rainfall effective rainfall pairs, two simple Loss-Function models are calibrated and compared: the Soil Conservation Service model and the φ-index model. Key-words: Rainfall-runoff model, DPFT method, Unit Hydrograph, Loss-Function, ARMAX Formulation

Metodologia DPFT de Identificação do Hidrograma Unitário e das Precipitações Efetivas: Estudo de Caso para a Bacia Hidrográfica de Juatuba ? MG