Various perspectives and challenges in agricultural water management have been discussed in detail in this book. Food security came up as a problem in the first decade of the 21st century, questioning the sustainability of humankind, which is certainly associated directly to the agricultural water management that has varied dimensions and needs integrative expertise in order to be dealt with. The aim of this book is to integrate the subject matter that deals with the modeling, auditing and assessment technique, and profitability, equity and irrigation water pricing in a single text. The book serves as a descriptive reference for professionals, students and researchers working on distinct aspects of agricultural water management. It is a comprehensive compilation of information regarding content revealing situations from distinct continents like USA, Europe, Africa, Australia and Asia. Several case studies have been elucidated in this book to provide the readers with a general scenario of the problems, challenges and perspectives on irrigation water usage.