With its broad coverage of the history of water availability and use, as well as government development, management, and policy of water usage, Principles of Water Resources is an ideal textbook for students from a wide range of backgrounds. Throughout the text, interesting sidebars, policy issues, and closer looks at past and present examples of water use bring the material to life. Updated and revised, this Second Edition features a new chapter on the economics of water, revised maps and photos, a new boxed feature titled Our Environment, a new guest essay on desalination by Dr. Fares Howari of United Arab Emirates University, and more.