The text is designed for advanced undergraduate or beginning graduate-level courses in hydrology, groundwater hydrology, hydrogeology, and civil engineering. This best selling text gives students a balanced examination of all facets of hydrogeology. The text stresses the application of mathematics to problem solving rather than derivation of theory. It provides a balance between physical and chemical hydrogeology. Numerous case studies cultivate student understanding of the occurrence and movement of ground water in a variety of geologic settings. *NEW - Updated references throughout the new edition. *NEW - Excel-based project included in the ground water modeling chapter. *NEW - Five new case histories: The Dakota Aquifer, Fractures Sedimentary Rocks - Newark basin, Faults as Aquifer Boundaries, Desert Hydrology -Azraq basin, Jordan, and Use of multiple geophysical techniques to determine the extent and thickness of a critical confining layer *NEW - 'Analysis' section in select chapters - Student is directed to a problem or issue that will require independent thought and problem solving techniques illustrated in the solved example problems. *NEW - Use of Internet to obtain hydrogeologic data and information. *NEW - Brief introduction to ASTM Standards. Provides students with numerous example problems accompanied by step-by-step solutions *Includes well-developed case studies in most of the chapters *Appendices - Include tables covering various functions, unit conversions, and additional data for solving well hydraulics, water chemistry, and contaminant transport problems. *Contains a thorough glossary of hydrogeologic terms making the book a valuable reference. *Incorporates an introduction to the methods of problem solving using dimensional analysis as well as a discussion of significant digits.