BLUE GOLD

The global water crisis and the commodification of the world's water supply

A Finite Resource

It is commonly assumed that the worlds water supply is huge and infinite. This assumption is false. In fact, of all the water on Earth, only 2.5 percent is freshwater, and available freshwater represents less than half of 1 percent of the world's total water stock. The rest is seawater, or inaccessible in ice caps, ground water and soil. This supply is finite.

As Allerd Stikker of the Amsterdam-based Ecological Management Foundation explains "The issue today, put simply, is that while the only renewable source of freshwater is continental rainfall (which generates a more or less constant global supply of 40,000 to 50,000 cubic km per year), the world population keeps increasing by roughly 85 million per year. Therefore the availability of freshwater per head is decreasing rapidly."

Most disturbingly, we are diverting, polluting and depleting that finite source of freshwater at an astonishing rate. Today, says the United Nations, 31 countries are facing water stress and scarcity and over one billion people lack adequate access to clean drinking water. By the year 2025, as much as two-thirds of the world's population-predicted to have expanded by an additional 2.6 billion people-will be living in conditions of serious water shortage and one-third will be living in conditions of absolute water scarcity.

World Resources, a publication of the United Nations Environment Program, the World Bank and the World Resources Institute, has a dire warning "The world's thirst for water is likely to become one of the most pressing resource issues of the 21st century...ln some cases, water withdrawals are so high, relative to supply, that surface water supplies are literally shrinking and groundwater reserves are being depleted faster than they can be replenished by precipitation."

Groundwater over-pumping and aquifer depletion are now serious problems in the world's most intensive agricultural areas. In the U.S., the High Plains Ogallala aquifer, stretching some 800 miles (1,300 km) from the Texas panhandle to South Dakota, is being depleted eight times faster than nature can replenish it. The water table under California's San Joaquin Valley has dropped nearly ten meters in some spots within the last 50 years. Twenty-one percent of irrigation in the U.S. is achieved by pumping ground water at rates that exceed the water's ability to recharge (and most water used for irrigation cannot be recycled).

 

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