Hydrogeophysics is a cross-disciplinary area of research that uses geophysics to determine parameters (characteristics; measurements of limitations or boundaries) and monitor processes for hydrological studies of matters such as water resources, contamination, and ecological studies.wikipedia
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Thus, the geophysical methods for mapping subsurface properties combine with hydrogeology to use proper, accurate methods to map shallow hydrological study sites.
Hydrogeophysics : field integrating hydrogeology with geophysics
ground penetrating radargeoradarGPR
Ground-penetrating radar (surface)- mapping stratigraphy and water table; monitoring water content
Cross borehole GPR has developed within the field of hydrogeophysics to be a valuable means of assessing the presence and amount of soil water.
watertablegroundwater tableperched lake
Seismic refraction (surface)- mapping top of bedrock, faults, and water table
Hydraulic tomography (crosshole)- measuring hydraulic conductivity
Neutron probe (wellbore)- monitoring water content
Permeameter (laboratory)- measuring hydraulic conductivity
Determining aquifer geometry
Gaining knowledge of an aquifer's hydraulic properties- transimissivity (rate at which groundwater flows through aquifer horizontally), porosity, and permeability (measure of the ability of a porous material to allow fluid to flow through)