You have gathered a lot of lithological information from boreholes. You have carefully developed a hydrogeological conceptual model (HCM) that you believe fits this data and is a good representation of the subsurface. However, sometimes you have difficulties calibrating your numerical hydrogeological model and fear that your HCM is too simplified. You either become careful and don’t use the model results as intended, or worse, end up making poor and risky water resources management decisions based upon a poorly calibrated model. Electromagnetic surveys provide an excellent opportunity to gain a more detailed understanding of the subsurface between wells. Compared to wells, these surveys can rather inexpensively provide a greater spatial coverage. This will greatly improve the development of the HCM. As a data greedy hydrogeophysicist, Max will show you examples from California on how electromagnetic surveys provide detailed 3D images bringing the understanding of the subsurface to a new level.
- Get an understanding of what geophysics can tell you about the geology and water quality in the subsurface.
- Learn how to select the right geophysical tool.
- Get an understanding of the benefits and limitations of the geophysical surveys.
Service Line Leader Water Resources Management
Max Halkjaer has a Master’s degree in geology and geophysics from the University of Aarhus. He has 26 years of experience in groundwater management, particularly with application of geophysical methods. Since 2013 he has been a Senior Hydrogeologist and Hydrogeophysicist with Ramboll, having a focus on California.