Optimum Use of Near Surface Resistivity Methods (i.e. -ERT, TDEM, AMT) for Improving Hydrogeological Concepts

Summary Near surface geophysical methods are developing fast in instrumentation as well as data interpretation software. It is not always easy to choose the best method and instrument for a certain hydrogeological problem in a certain area. Building a conceptual model from existing information and translate this concept into the expected distribution of the geophysical parameter and test the concept with forward models before will help in choosing the best method, instrumentation and field approach. During a fieldwork, comparing results directly with the concept improves the measurement strategy, speed and final interpretations. After fieldwork additional forward modelling can help to translate the inversion results into a hydrogeological concept. This presentation will focus on the geophysical parameter of resistivity because of its useful applications in hydrogeology and relative simple methodology ,recent developments in instrumentation and user friendly software.