Including the influence of groundwater exchanges in a lumped rainfall-runoff model

Traditionally, surface and ground water resources have been managed as separate resources in Australia, with the result that interactions between the two components have not been duly considered in the development of management strategies. A more integrated approach is required to evaluate the impacts of groundwater extraction on streamflow regime, and eliminate the potential for over-allocation of resources due to doubleaccounting of the available resource. Models, which represent the exchanges of water between surface and ground water systems, are needed to inform integrated water resource management.