Estimation of the time scale of the geomorphologic instantaneous unit hydrograph from effective streamflow velocity

Authors

  • C. Agnese,

  • F. D'Asaro,

  • G. Giordano


Abstract

The greatest difficulty in applying the geomorphologic instantaneous unit hydrograph is the estimation of the time scale of the hydrologic response of a basin. We derive the time scale from the effective streamflow velocity of the highest-order stream and the spatial distribution of velocity throughout the stream network. The latter is described by a dimensionless geomorphologic function with a single-shape parameter. The proposed method is applied to some Italian basins.

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