Leading experts in water-related fields have come together to make Water Encyclopedia a one-stop, comprehensive reference about the world s most important natural resource. It covers designated topics in a clear concise and authoritative manner. The treatment is practical in orientation, keeping in mind the needs of the users. Theory is included only where required for an understanding of the topic.

Jay Lehr is Senior Scientist at the Heartland Institute and Senior Scientist at Bennett & Williams, Inc. He has written 14 books and over 500 articles on environmental science. He received the nation’s first Ph.D. in Ground Water Science form the university of Arizona in 1962. For 25 years he headed the Association of Ground Water Scientists and Engineers. In addition, Dr. Lehr has experience as an academic researcher in environmental science and helped the federal government develop several levels of environmental regulations, including the areas of surface water and ground water.

Jack Keeley is the former Chief of Groundwater Research at the USEPA Kerr Water Resource Research Laboratory in Ada, Oklahoma.