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In a recent issue of Water International, three authors discuss their views of the virtual water metaphor that is used to describe the water embedded in crops that are traded in international markets. The term 'virtual water' was created originally to gain the attention of public officials responsible for choosing policies that influence water use in arid regions. Over time, both the terminology and the scope of the virtual water metaphor have been extended beyond the original purpose. This paper supports the view that the virtual water metaphor is helpful in encouraging public officials to consider the scarcity value (opportunity cost) of water when designing policies that influence water use. The paper proposes, also, that the policy relevance of the virtual water metaphor is found primarily in its application to issues regarding the supply of agricultural products, rather than demand. The distinction between supply and demand issues and the potential value of the virtual water metaphor in policy discussions regarding supply are demonstrated using three examples of water allocation decisions, described within the framework of economic optimization. The examples include wheat production in Saudi Arabia and the production of sudangrass and ethanol in the United States. [ABSTRACT FROM AUTHOR]

Groundwater plays a critical role in arid West China where water is the limiting factor for development. This paper first describes groundwater characteristics in a region of four arid inland river watersheds and the problems associated with groundwater consumption. This region exhibits a unique alternating pattern of high mountains and depressions, which results in extensive interactions of surface water and groundwater. Then the authors propose six strategies to support adequate exploitation and use of groundwater in the region. These strategies are: 1) setting up a groundwater monitoring system; 2) forming a unified watershed authority, 3) protecting mountain ecology; 4) increasing the efficiency of groundwater usage; 5) protecting groundwater; and 6) supporting advanced research. The implementation of these strategies should be built upon the promotion of sustainable economic development and broad public support. [ABSTRACT FROM AUTHOR]

This article presents information on the achievements and activities of the International Water Resources Association (IWRA) of the United States. IWRA has achieved considerable landmarks in the year 2005. The Association has leaped forward despite major water disasters in the world starting with South Asian Tsunami and the major damage of Hurricanes in the United States and the persistent drought in Africa. The Association has also completed the 12th World Water Congress in New Delhi, India. Around 500 participants from 50 countries attended the conference. They presented some 200 papers and key note addresses focusing on the contemporary water issues of the day. In this conference, the members of the Association added several special sessions to highlight specific regional water issues of interest to all the participants. It was a learning experience for all the participants. The occasion was accompanied by an excellent dose of cultural events and surrounded with traditional Indian hospitality. Apart from the New Delhi conference IWRA has sponsored and co-sponsored several events in the United States, Finland, Sweden, Italy, Egypt, China and elsewhere to strengthen the dialogue on water issues across the world.