This is an up-to-date treatment of hydrologic processes as they apply to both the student and the practising professional in the field of hydrology. Included is Microsoft Windows based software which helps illustrate the concepts of the text and is a resource to the engineer in performing hydrologic calculations. Current methodologies, such as the use of a spreadsheet in hydrology and the use of the Internet in data collection, are covered. Another addition for the hydrology instructor are the case studies included with each chapter and the assignments.