GIUHGeomorphological Instantaneous Unit Hydrograph
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Several rainfall data sources were used for correction as a proper rainfall distribution is needed for the GIUH approach.
Model parameters of the GIUH include the Horton's ratios, hill slope and stream flow velocity.
s]) to derive the GIUH (figure 4), the surface runoff is calculated based on equation (3) using an Excel spreadsheet in a discrete time domain (see Chow et al.
For the GIUH approach, the initial abstraction was assumed correctly, therefore the CN value was kept constant as 85.
Therefore, it can be confirmed the GIUH model approach can be successfully implemented to data scarce catchments as was the case here, the ungauged Can Le catchment.
The GIUH is an event-based model, it does not take into account the changes in soil moisture, etc (e.
The GIUH only takes into account the surface runoff of the catchment and routes it through the channel network.