The textbook "Groundwater Hydraulics" offers a comprehensive introduction to the hydraulics of groundwater and its connections to various scientific disciplines. It is aimed at students, researchers, and practitioners who wish to engage with the fundamental aspects of groundwater hydraulics. The content is structured to be suitable for both beginners and advanced learners who want to study this topic over a semester. The book covers key subjects such as groundwater hydrology, fluid dynamics in porous media, and groundwater quality. It is designed to provide a solid understanding of groundwater hydraulics and prepare readers for the challenges in this field.