Comparison Of Alternative Loss Modules In The IHACRES Model: An Application To 7 Catchments In Wales

The IHACRES model has been successfully applied to many catchments across the UK including regionalization studies (e.g. Sefton and Howarth, 1998; Littlewood, 2003). However, while the previous formulation of the non-linear module performs well in calibration and simulation, the module has some identified deficiencies in the representation of the impacts of climate change on volume of streamflow. The recently developed Catchment Moisture Deficit (CMD) version of the non-linear module (Croke and Jakeman, 2004) has a stronger physical basis than the previous formulation of the IHACRES non-linear loss module, which potentially enhances the performance in regionalization studies.