Geophysical Mapping: Problem Details 17 of 39 Problem Name: Groundwater table Problem Type: Groundwater Assigned Methods: + DC geoelectrics - Sounding Electrical Methods + Electrical and induction logging Borehole Methods + Fluid logging, Flow meter Borehole Methods + Frequency-domain electromagnetics - Profiling Electromagnetic Methods + Frequency-domain electromagnetics - Sounding Electromagnetic Methods + Geoelectrics - Tomography (surface based) Electrical Methods + Ground penetrating radar (surface-based) Electromagnetic Methods + Standard refraction seismics Seismic Techniques + Surface Nuclear Magnetic Resonance (SNMR) Radioactivity + Time-domain electromagnetics - Profiling Electromagnetic Methods + Time-domain electromagnetics - Sounding Electromagnetic Methods + Very-high resolution reflection seismics Seismic Techniques 0 Acoustic logging Borehole Methods 0 Borehole imaging, Structure logging Borehole Methods 0 Geoelectrics - Crosshole tomography Electrical Methods 0 Ground penetrating radar - Borehole tomography Electromagnetic Methods 0 Nuclear logging Borehole Methods 0 Refraction seismic tomography (surface-based) Seismic Techniques 0 Seismic crosshole tomography Seismic Techniques 0 Seismic surface waves methods Seismic Techniques 0 Shallow reflection seismics Seismic Techniques 0 VLF / VLF-R, Radiomagnetotellurics Electromagnetic Methods    '+' = Technique applicable; '0' = Application possible/limited use