Determination of the geomorphological instantaneous unit hydrograph using tracer experiments in a headwater basin

The geomorphological instantaneous unit hydrograph (GIUH) is a useful tool to describe basin response. In the present study, results of tracer experim ents on a hillslope and the channel network were used to determine the GIUH . The area weighting function of the GIUH was determined using digital elev ation data. The combination of hillslope pathway and channel length distrib utions were used as area weighting function. The resulting GIUH provides a reasonable production of an observed runoff event.