Thu, Aug 25, 2011 - Page 5 News List

FEATURE: Energy demand adds stress to water supply


A boy kicks at water jets at a fountain in Beijing, China, on Tuesday. The Asian Development Bank said on Tuesday that the region’s water supply is already under threat and could become critically short in 20 years’ time.

Photo: EPA

A Google search for “world water shortage” will produce more than 4 million results in 0.17 seconds. It will also use a tenth of a teaspoon of water, experts say.

Given water’s role in power generation, the impact of about 300 million Google searches a day is around 150,000 liters daily — in a world where water is increasingly scarce.

“These two things — water and energy — come together and that’s a big thing for the world to understand,” says Len Rodman, a US-based water and energy expert.

“If you squander water, if you indiscriminately use power, then in the long run that will have implications for the world,” the chief executive of Black & Veatch, a major global water and energy company, said in an interview.

The Asian Development Bank (ADB) has forecast the region’s energy demand to double by 2030 to 6,325 million tons of oil equivalent, or about 74 billion kilowatt-hours of electricity.

Water will play an increasing role as a power source for Asia, but supplies are already under threat, the ADB said.

China and India, the world’s most populous nations, are expected to have a combined shortfall of 1 trillion cubic meters of water within 20 years.

Bangladesh, Cambodia, Nepal, Pakistan, the Philippines and Vietnam are already under “water stress” conditions, meaning they are experiencing periodic or limited water shortages.

During an international water conference in Singapore last month attended by Rodman, industry players and government officials called for better integration of water and energy policies to help find solutions to looming shortages.

“There is a growing realization that we can no longer think about energy and water separately,” Peter Gleick, president of the Pacific Institute in California, said at the conference.

A survey of more than 700 US utilities firms by Black & Veatch showed that for the first time, water supply was the top environmental concern.

Asia is likely to face the same problems, Rodman said.

“It will truly be exacerbated in this region because of the urban densities that are there. You’ve got tremendous numbers of highly concentrated urban areas,” he said.

In 2008, 2.2 billion cubic meters of water were diverted from three major hydroelectric plants in Vietnam for agriculture, leading to a shortfall of 430 million kilowatt-hours of electricity.

Research is continually being carried out on water treatment technologies that require less energy as well as power-generation facilities that would need less water, experts said.

Advanced technologies to treat polluted water as well as recycle water from toilets, kitchen sinks and sewers for use in homes and industries will help address Asia’s future needs, they said.

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