Constrained Inversion of Helicopter AEM Data for Managing Irrigation Salinity

A015 CONSTRAINED INVERSION OF HELICOPTER AEM DATA FOR MANAGING IRRIGATION SALINITY ANDY GREEN 1 ROSS BRODIE 2 TIM MUNDAY 3 Abstract 1 The RESOLVE frequency domain HEM system has been used to map the distribution of near-surface clay-rich sediments in and around the Riverland irrigation districts of South Australia. The data were recalibrated with measurements from down-hole induction logs and then inverted using a 1-D layeredearth model. The inversion was constrained with as much geological and hydrogeological information as possible. The resulting detailed map of the distribution of the Blanchetown Clay is being used to model the recharge behavior of