ABSTRACT
ABSTRACT: In spite of the current wealth of experience, very good know-how and technologies, and sometimes high financial means, problems with respect to water security-the sustainable use and protection of water systems for humans and the environment-remain in many cases enormous. Starting from the human influence on the hydrological cycle, and using basic and current statistical data, this paper examines primarily the biophysical and engineering aspects of key water security issues, and considers their implications for developed countries, emerging countries, and least developed countries. Present and future impacts of population and living standard growth, urbanisation especially in flood plains, agriculture and food supply, climate change, industrial water use, floods, and the potential of virtual water trade, are explored. The inescapable conclusion is the need for increased intelligent water management to assure and improve water security for humanity.
