Abstract

Several studies are described that provide information on some problems involved in transferring hydrological relationships between small and large drainage basins and between regions. The studies illustrate the fact that basin processes vary considerably from one region to another, and over small distances within one region. These processes include the type and characteristics of storm runoff, small-scale variations of infiltration and runoff, spatial aspects of nonlinear flood response, annual runoff relations and channel transmission losses. Examples are also given of problems in identifying similarity relationships resulting from interaction of model parameters with basin size, and from random and systematic errors in available hydrological data. The results indicate the need for better knowledge of actual hydrological processes at basin scale.

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