The author argues that it is essential to manage water in different ways from those relied on in the last century. We must instead maintain the water cycle and the ecosystems that support it. Her book looks at the complexity of how to do this. And it provides a wide array of ideas, information, case studies and ecological knowledge - often from remote corners of the developing world - that could provide an alternative vision for water use and management at this critical time. After discussing how the water cycle works and the inadequacies of current approaches to overcoming the growing gap between supply and demand, it examines each element of water use - irrigation for food production, water for households and sanitation, flood management, inland waterways for transport, and energy production - in order to identify the problems confronting us and the alternative approaches and policies we could pursue that would be compatible with nature. The book concludes by looking at current policy debates, the institutions needed to ensure the global preservation of the water cycle, and how to involve local people in water management decisions affecting their welfare. This book makes for essential and compelling reading for students on courses related to water resources management and development; water managers and decision makers, and non-specialists with an interest in global water issues.