A Unique Long-term Monitoring Transient Electromagnetic Dataset

Area of Science:

• Geophysics
• Environmental Science
• Hydrogeology

Background:

• Saltwater intrusion is a significant environmental challenge in coastal regions like Falster, Denmark.
• Long-term geophysical monitoring is essential for understanding and mitigating such issues.
• Existing datasets may not fully support advanced time-lapse inversion algorithm development.

Purpose of the Study:

• To present the first long-term monitoring dataset using a dedicated transient electromagnetic (TEM) instrument.
• To provide a high-consistency dataset for reliable temporal interpretation of geophysical changes.
• To facilitate the testing and validation of advanced TEM inversion algorithms.

Main Methods:

• Deployment of a specialized transient electromagnetic (TEM) instrument for geophysical monitoring.
• Acquisition of 762 measurements over a period of approximately 2.6 years (January 2023 - September 2025).
• Data collection focused on Falster island, Denmark, an area prone to saltwater intrusion.

Main Results:

• The dataset exhibits high consistency over the monitoring period.
• It offers a robust foundation for interpreting temporal changes in subsurface properties.
• The data is suitable for validating various advanced TEM inversion techniques.

Conclusions:

• The presented TEM dataset is a valuable resource for geophysical research.
• It supports the advancement of time-lapse geophysical studies and inversion algorithms.
• This dataset will aid in better understanding and managing saltwater intrusion issues.