Inverted RESOLVE FDEM data for the Bookpurnong stretch of the River Murray, were compared with the Insteam NanoTEM data and available river-bed core data. The AEM data were not collected along the river itself, but extracted from gridded profile data flown in a WNW-ESE direction. The HEM data show very similar trends in conductivity variation identified in the corresponding NanoTEM data as shown in Figures 1 and 2. There are some minor differences between the two images shown in Figure 1, but this is attributed to the NanoTEM data representing the conductivity of riverbed sediments, whereas the RESOLVE data represents the 1.5-3 metre depth from the waterlevel surface of the river. The inverted conductivity depth sections shown in Figure 2 provide a better means of comparing the two techniques. For this reach of the river the RESOLVE HEM and NanoTEM data effectively map gaining and losing stream conditions and provide significant insight into the interplay between an irrigation induced groundwater mound, the regional groundwater system and river salinity. Regolith 2006 - Consolidation and Dispersion of Ideas
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