The fully revised second edition of water Resources Systems Planning and Management presents new and updated material including case studies and examples as well as timely topics such as climate change and integrated water resources management. Authored by two renowned experts in the field of water resources, this text is divided into four parts. It begins by introducing the basic theme of the book. It provides an overview of the current status of water resources utilization, the likely scenario of future demands, and advantages and disadvantages of systems techniques. Part 2 represents several techniques organized over four chapters. After discussing optimization and simulation, the techniques of economic analysis are covered. Part 3 deals with water resources planning and development. This part discusses the concepts of planning, the planning process, integrated planning, public involvement, and reservoir sizing. The last part focuses on systems operation and management and includes three brand new chapters.