The irrigation system default values are based on industry experience gained across a number of modelling studies and documents.
The target is the soil water content irrigation is applied to achieve (mm deficit or %PAW).
It will normally be less than the soil moisture deficit at the time of application to allow space for any subsequent rainfall. It may be increased to account for non-uniform application.
Target is not a parameter for controlled flood or border dyke systems and hence are not set as defaults.
Table 1: Default target values