Author(s): Richard M. Vogel; Antigoni Zafirakoukoulouris; Thaddeus Green

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Abstract: Fiering (1967) introduced a very simple, three parameter rainfall-runoff model termed the"abc" model which describes the relationships among precipitation, evapotranspiration, groundwater storage and streamflow for a catchment. This model has been shown by others to be useful for modeling monthly and annual streamflows. The weakest feature of this watershed model involves the algorithm for computing actual infiltration and actual evapotranspiration. We provide an extension to the "abc"model which captures the observed relationship between actual evaporation, potential evaporation and soil moisture. An application to the upper Colorado river basin demonstrates that this simple extension can provide a very realistic simulation of the relationships among precipitation, evapotranspiration, groundwater storage and streamflow, at the annual level, using a remarkably simple model structure with only four model parameters.

DOI:

Year: 1997