Optimization of geoelectric methods for cultural heritage and near-surface resource management with a focus on 3D and time-variant effects

This thesis addresses several specific challenges for geoelectric methods that arise in connection with the management of cultural heritage and near-surface resources. The thesis is based on three scientific articles. Each of these articles aims to develop methodologies for addressing specific problems, test their practical applicability, and evaluate the extent to which the presented approaches can contribute to the optimization of geoelectric methods.

The first paper deals with the so called "pole-pole conversion" which aims at calculating arbitrary 4-point-configurations using a comprehensive set of pole-pole configurations. The second paper focuses on correcting the effect of highly-conductive seawater on 2D geoelectric profiles running parallel to the coast. The thrid paper presents geoelectric monitoring results of a private near-surface geothermal system and discusses possibilities to distinguish between natural and anthropogenic temperature changes.

In summary, all the approaches presented for optimizing geoelectric methods are designed to address specific research questions or problems. However, the resulting benefits can also be transferred to other applications, provided that the relevant conditions are met. For example, the approach for correcting 3D effects on 2D profiles is not limited to coast-parallel geoelectric profiles, but can also be applied to other 3D problems, provided that the correction function is adapted accordingly. Particularly when combined with other optimization techniques like the "Compare R" method, the presented approaches have the potential to contribute to further optimization and expanded use of geoelectric methods in the future.