- Engineering, general 6
- Geotechnical Engineering & Applied Earth Sciences 6
- Biogeosciences 4
- Geochemistry 4
- Geology 4
- Civil Engineering 3
- Earth Sciences, general 3
- Terrestrial Pollution 3
- Hydrogeology 2
- Waste Management/Waste Technology 2
- Classical and Continuum Physics 1
- Engineering Fluid Dynamics 1
- Engineering Thermodynamics, Heat and Mass Transfer 1
- Environmental Science and Engineering 1
- Hydrology/Water Resources 1
- Industrial Pollution Prevention 1