Articles | Volume 2, issue 1
Hydrol. Earth Syst. Sci., 2, 1–8, 1998
https://doi.org/10.5194/hess-2-1-1998
Hydrol. Earth Syst. Sci., 2, 1–8, 1998
https://doi.org/10.5194/hess-2-1-1998

  31 Mar 1998

31 Mar 1998

The geomorphological unit hydrograph – a critical review

A. Y. Shamseldin and J. E. Nash A. Y. Shamseldin and J. E. Nash
  • Department of Engineering Hydrology, National University of Ireland, Galway, Ireland

Abstract. The theory of the geomorphological unit hydrograph (GUH) is examined critically and it is shown that the inherent assumption that the operation of the drainage network may be modelled by a corresponding network of linear reservoirs so restricts the instantaneous unit hydrograph (IUH) shape that the effects of further restrictions, reflecting the constraints imposed by the geomorphological laws of the channel network, cannot easily be identified. Without such identification, the geomorphological unit hydrograph theory is untestable and must remain only a plausible hypothesis providing an indication of a two-parameter IUH whose shape and scale factors must still be related empirically to appropriate catchment characteristics.