Implementing borehole in Cambodia: geophysical contribution

To drill successful boreholes, hydrogeologists have to answer fundamental questions, i.e. where is the groundwater? what will be the yield of a borehole ? what is the water quality? Geophysics is very attractive to complete the standard hydrogeological approach to answer these questions, but conventional methods provide information which is not always directly related to groundwater. A new method, called Surface Nuclear Magnetic Resonance (SNMR), is supposed to detect groundwater directly at various depths. A geophysical study was implemented in Cambodia with conventional and SNMR methods to measure the geophysics contribution to a drilling programme. This paper presents the main technical and financial analyses of this operation.