Despite the difficult conditions at our main geophysics survey site (see my last post), Mark has been mastering the equipment on his own farm down by the river. Here conditions are less dry, and certainly more suited to a resistivity survey. In a team of one, he marked out a grid square, set up the machine and completed a survey of the square. The effort was certainly worth it, with some very impressive results. Here is a plot of the results:
The plots all show the same grid square, each using a slightly different way of representing the data. The grid square covered ‘an unusual bump by the river bank’, and the bump is clearly depicted in the plot, and shows the equipment is operating effectively.
Mark also surveyed a grid square covering an old stream bed, picked up on an aerial photograph taken from his model plane! The results are shown below:
The results here are slightly less distinct, but there is a clear edge across the south east corner of the square. We are considering doing some more survey work near the river while the dry spell continues!