We are pleased to introduce the fourth issue of the Journal of Environmental and Engineering Geophysics (JEEG) for 2023. This issue comprises five papers that bring new insights into environmental and engineering geophysics.

The first paper, authored by Bievre and Garambois, successfully combined remote sensing and ground geophysical techniques to locate an abandoned and forgotten landfill in a fluvial plain in the French Western Alps. Historical aerial photographs, a LiDAR DEM, and geophysical mapping techniques revealed the landfill’s location and spatial extent, while ground-penetrating radar and electrical resistivity tomography provided a quantitative assessment of pit dimensions, enabling waste volume estimation...

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