In 2017, a review of approaches to modelling irrigation recharge found:
A lack of suitable modelling tools available to account for unsaturated processes (e.g. perching) that affect timing and magnitude of salt loads; inconsistent approach to deriving irrigation recharge using forward or inverse modelling approaches.
Objectives of the transfer function program framed around addressing these knowledge gaps:
To develop and test transfer functions / recharge models suitable for salinity assessment modelling; to develop and test hybrid / joint calibration (JC) modelling techniques that use recharge models developed.