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Ground water is a critical resource for domestic, agricultural and municipal needs. Airborne and land mapping of the subsurface structure allows the identification of saturated zones, pathways for fluid migration and permeable vs impermeable interfaces.
Modelling of an impermeable deeper surface, from a range of geophysical datasets (gravity, gravity gradiometry and magnetics), ideally acquired together, can provide an initial overview of basin structure and sedimentary thickness. Modelling of the shallower permeable aquifers, identifying structural or stratigraphic control can be achieved based on the associated density contrasts across such layers. High-resolution airborne gravity gradiometry data can assist with the mapping of such contrasts, as can land gravity and magnetotelluric methods.