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Estimation of the time scale of the geomorphologic instantaneous unit hydrograph from effective streamflow velocity
Author(s) -
Agnese C.,
D'Asaro F.,
Giordano G.
Publication year - 1988
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr024i007p00969
Subject(s) - hydrograph , streamflow , scale (ratio) , hydrology (agriculture) , dimensionless quantity , structural basin , geology , environmental science , drainage basin , geomorphology , geography , geotechnical engineering , cartography , physics , mechanics
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.