2.5.2.3 Gaps

The groundwater model was not constructed to permit the generation of sub-domain groundwater balances. The surface water modelling domain overlapped, but did not conform exactly to, the groundwater modelling domain. Generating a single, integrated water balance for the Hunter subregion or for subdomains of the subregion that draws on water balance terms from both models was not possible.

Mine discharges from additional coal resource development were not included in the river modelling. More information needs to be obtained about typical discharge volumes, discharge rules, and water sharing arrangements between Ulan, Moolarben and Wilpinjong mines to represent this in the model.