Runoff from the hills and ranges of the Liverpool Plains, NSW, contributes to water table rises lower down in the catchment. A simple predictive modelling approach is being developed to enable management decisions for lowering groundwater tables and making productive use of saline land. This must reliably predict factors such as the impact on groundwater balance of different landcovers in different parts of the catchment. With this information, areas of the catchment can be targeted for remediation.