This book provides a comprehensive coverage of the theories and practices of sea water intrusion in coastal aquifers, written by a select group of more than two dozen international experts. The subjects range from the fundamentals such as the physical background and the mathematical theory, to the newest technologies in geophysical and geochemical survey, monitoring, exploitation and restoration of aquifers, planning and management. For engineers, quantitative tools such as analytical solutions, numerical techniques, and stochastic analysis methodologies are provided. Several numerical codes that include two popular USGS computer programs SHARP and SUTRA, written by the original developers, and other advanced codes, are available for sharp interface and density-dependent transport modeling. Case studies include those of the USA, the Netherlands, Israel, and Egypt. Audience: This book is well suited for students learning the subject, professionals for enrichment of new information and technologies, water resources planners for broadening their knowledge and options for combating sea water intrusion.