Investigation into salinisation in southwestern Queensland

Abstract

This study, combining geophysical and environmental approaches, was undertaken to investigate the causes of secondary salinity in the Goondoola Basin, in southwestern Queensland. A range of airborne and ground geophysical datasets were acquired, along with information on surface and subsurface materials and groundwater. Relationships established between various spatial and point datasets allowed us to generate predictive maps of surface materials, surficial salt stores and recharge potential. Investigation of groundwater and subsurface architecture identified subsurface salt stores and potential discharge areas. Salinisation in this area occurs as a result of local- and intermediate-scale processes, controlled strongly by regolith architecture. Management strategies can now be tailored specifically to prevent excess recharge and further salt mobilisation.