Groundwater modelling is an essential and widely used technique to quantify hydrogeological processes in water resource management. Models may be used to analyse the characteristics of groundwater flow systems (water balance, groundwater flow rates, residence times, etc.) and to predict the future response to natural and anthropogenic impacts and management scenarios. This unit teaches the theoretical and practical aspects of numerical groundwater flow modelling. The students learn how to develop conceptual models of groundwater flow systems and develop corresponding numerical models. Topics include model construction and discretisation, boundary conditions, model calibration, etc. This unit is designed to give students the information to successfully construct their own models and be able to use these skills in the workforce across consultancy, resource exploitation, research and regulation.