Determining the trace of animal burrows is difficult without destroying the burrow. A limited number of studies have shown that it is possible to trace burrows using GPR, when ground conditions are acceptable. For this study we anticipate that most soils will be sandy, with limited clay content. Some potential field areas are dominated by the existence of extensive surface calcrete layers that wombats are able to burrow under at their margins. These areas are especially difficult to determine burrow trace locations and their density.
For this work we intend to use the Mala X3M receiver system paired with the Mala 500 MHz shielded antenna, mounted on a rough terrain cart. We will bring other antennae as well, to match local conditions. Each field area will be gridded so that measurements can be made on a suitably fine scale (~50 cm to 1 m across-line spacing). Positions will be logged directly to the GPR receiver system using a differential GPS. Additionally, each survey area will also be surveyed using an EM31 soil conductivity meter (or equivalent), to ensure that soil conductivity is known, and data are not collected where conductivity is too high.