Chloride profiles and electromagnetic techniques are used to estimate rates of groundwater recharge. The use of electromagnetic techniques allows large numbers of estimates to be made in a relatively short period of time, thus permitting statistical analysis of the spatial variability. Recharge rates appear to be approximately log-normally distributed, in accordance with published results for infiltration rate and hydraulic conductivity. The spatial structure is approximately defined by a spherical semivariogram. The results derived are applied to a study of groundwater salinisation. Predictions for future recharge and salt loads to the aquifer are made based on the estimated recharge distribution.