This course provides participants with the background, understanding, and techniques to assess groundwater resources using a wide variety of information. Basic principles start from the point of geological mapping, which is re-interpreted using hydrostratigraphic classification to help to define hydrogeological units. Approaches used to develop these into evaluations of groundwater resource potential include field and desk reconnaissance, and analysis of surface geophysics. Understanding of recharge rates is developed through application of various methods, and methods of determining physical aquifer properties using borehole information are introduced. A brief introduction to methods of presenting natural groundwater chemistry provides the basis for its use within an integrated approach to resource evaluation.