ABSTRACT
In general, neither surface nor borehole geophysical methods can be used alone for the characterization of coastal aquifers in situ. This rather broad statement is based on the observation that surface geophysical surveys almost never have enough resolution to unambiguously define subsurface conditions [Sharma, 1997]. Much more definitive characterization can usually be performed using borehole geophysics, but there are never enough boreholes to effectively characterize complex formations on the basis of borehole data alone. Therefore, this discussion starts from the premise that effective characterization of subsurface hydrogeologic conditions in a heterogeneous coastal aquifer needs to be based on an effective integration of surface and borehole geophysics with other geologic and hydrogeologic data. At least in concept, subsurface characterization can be completed by using a limited set of borehole measurements to calibrate and otherwise condition a set of surface geophysical measurements that provide complete, threedimensional coverage of the study region.
