This book primarily designed to cater to the needs of students, research scholars and professionals associated with groundwater resources development and management, covers major topics on groundwater hydrology. The book spreads in 14 chapters with solved examples and case studies. The chapters are devoted mainly in explaining the basic concepts of groundwater resources development, estimation of aquifer parameters especially in hard rock formations, pumping test data analysis and reuse of industrial effluent and design of wells, selection of pumps and techniques of groundwater exploration. A chapter on analysis of pumping test data of large diameter wells in hard rock formations describes the techniques involved. A sincere attempt has been made to compile and present the text in quickly understandable form. Well drawn diagrams and elaborated worked examples provided in various chapters helps in better understanding of the concepts. This is expected to serve as a good textbook for students, a reference tool for professional and a good teaching material for teachers in the field of groundwater resources development and management.