Studies of the geophysical responses of landfills in Northern Ireland using the Tellus airborne EM data

This report provides descriptions of the Tellus airborne geophysical data in the vicinity of landfills in Northern Ireland. The main data considered are the Electromagnetic (EM) data and the conductivity models (half-space and multi-layer) that can be obtained from these data. Some descriptions of the magnetic and radiometric responses are also given. Only the locations of the landfills have been supplied (i.e. no site information is available other than a coordinate). This means that only scant comments regarding an understanding of both observations and models are provided. Ten landfill locations with associated conductivity variations were chosen; the study is therefore not intended to be exhaustive. The first 4 landfills studied use data from the 2005 Phase 1 Tellus survey so that only 2 frequency data are available. The remaining 6 landfills have 4 frequency data available from the 2006 Phase 2 survey.