This book puts great emphasis on the importance of Integrated Water Resources Management IWRM as the way forward towards food, water, and energy security. It offers better ways and means of managing the limited water resources; using water more efficiently; adopting new policies in order to cope with climate change and drought; increase water supply through the use of non conventional water resources, especially waste water; inducing stakeholders participation and information exchange and raise public awareness to the value of water. It is an important book for all those involved in all aspects of water resources and contains valuable information for scientists, researchers, farmers, extension services and students.