Water, the most vital of all resources, has emerged as a key issue that will determine whether Asia is headed toward cooperation or competition. After all, the driest continent in the world is not Africa, but Asia, where availability of freshwater is not even half the global annual average of 6,380 cubic meters per inhabitant.

When the estimated reserves of rivers, lakes and aquifers are added up, Asia has less than one-tenth of the waters of South America, Australia and New Zealand, not even one-fourth of North America, almost one-third of Europe and moderately less than Africa per inhabitant. Yet the world's fastest-growing demand for water for food and industrial production and for municipal supply is in Asia, which now serves as the locomotive of the world economy.

Today, the fastest-growing Asian economies are all at or near water-stressed conditions, including China, India, South Korea, Vietnam and Indonesia. But just three or four decades ago, these economies were relatively free of water stress. Now if we look three or four decades ahead, it is clear that the water situation will only exacerbate, carrying major implications for rapid economic growth and inter-riparian relations.