海角大神

As the historic drought now聽searing more than 60 percent of the US聽drags on, the impact聽could soon be sweeping聽across the country and beyond.

After the obvious聽push on food prices, drought experts say the cascading chain of secondary societal effects will range from聽higher聽utility prices and industry costs in the developed world to population displacements and potential political unrest in less developed regions.聽

鈥淭he US will see food prices go up, possibly we will see some items聽disappear from聽grocery shelves,鈥� says Frank Galgano, chair of the Department of Geography and the Environment at Villanova University聽in Philadelphia, and an expert on environmental change and security.

鈥淵ou will start to see more foreclosures in the farm belt as farmers and ranchers can鈥檛 pay their bills,鈥� he says. 鈥淭hose guys mortgage themselves to the hilt for their seeds and equipment, and if the crop doesn鈥檛 come in they are in trouble.鈥�

That loss in turn undermines the tax base of a community which shrinks its capacity to聽fund every government function from schools to bridge maintenance.

On a global聽level, Professor Galgano points out that the US is the breadbasket for the world. The United Nations estimates that global food demand has risen 21 percent over the past decade. In the past month alone, the price of corn has risen 34 percent as a result of the US crop losses.

鈥淲e supply food to other parts聽of the world,鈥� he says, noting that this allows many聽countries in arid areas such as Africa and the Mideast to use more聽fresh water for other civic needs. 鈥淭his includes drinking water, so if food becomes more聽expensive and shorter in supply, water stress in聽those areas becomes more aggressive.鈥�

鈥淭he governments must take more water for agriculture and less for civic needs. That is the聽global effect of drought in the US,鈥� he says.

While many are quick to link this current drought system to long-term climate change, scientists at the聽heart of聽drought research聽suggest it is, at minimum, a wake-up call.

鈥淒rought eventually can hit all sectors of the economy,鈥� points out Brian Fuchs of the National Drought Mitigation Center at the University of Nebraska, Lincoln.聽

Drought is a聽part of the planet鈥檚 natural history, he says, pointing to tree rings that document聽devastating droughts聽in prehistoric times that displaced entire populations.聽Droughts will always be with us, he notes.聽

High-profile events such as the drought now covering more than 1,000 US counties聽highlight the need for better monitoring, preparedness, and mitigation, says Chad McNutt, of the National Integrated Drought Information System (NIDIS) in Boulder, Colo. 聽

鈥淭here is a gap in how states are dealing with water supply issues, and they are all learning in real-time how to deal with them,鈥� he says,聽pointing to such anecdotes as聽a Texas town that connected a fire truck pumping machine to a fire hydrant to supply field and drinking water.

The six-year聽Dust Bowl in the 1930s that hit the corn belt hard led to important changes,聽says聽Richard Sutch, emeritus professor of economics at the University of California, Riverside.

鈥淭he experience revealed an advantage of the newly-introduced hybrid corn varieties,鈥� he says via e-mail,聽namely their drought tolerance. 鈥淏efore this, hybrid corn was not selling well. Afterward adoption rates soared.聽Today over 95 percent of the corn planted in the US is a hybrid variety.鈥�

But while technology has helped fight food shortages,聽tripling per acre聽productivity in just a century, experts warn much more needs to be done to mitigate the impact of drought. The United States needs to come to terms with the changing terrain of water, 鈥渁nd fast,鈥� says 海角大神a Peppard, assistant professor of theology and science聽at Fordham University in New York.

Not just because, as Secretary of State Hillary Rodham Clinton remarked on World Water Day 2012, 鈥渨ater is integral for well-being and can even pose a national security threat,鈥� she notes via email, but because facing drought as "the new normal" means that the nation聽will have to rethink the way it conducts 鈥� and incentivizes 鈥� its agriculture.

It's not just the corn crops that might fail this year, she points out.聽The Ogallala Aquifer, which undergirds much of the corn belt of the United States and extends from Nebraska into Texas, has long been a primary source of water for large-scale agriculture.

鈥淲e've fed many, and offloaded many petrochemicals downstream. And where has that water for agriculture come from? It has often come from the Ogallala Aquifer, a source of groundwater that is non-renewable on any humanly meaningful time scale,鈥� she notes.

Perhaps one outcome of this drought will be that we learn that the deep, non-renewable water in aquifers is what is keeping our agricultural fields saturated. But that water will run out.

鈥淚t's time to think wisely about where our water comes from, who puts what into it, where it goes, and who is responsible for it,鈥� she says, "Fresh water is the most significant political, economic, and ethical problem that the United States and the world will face in the 21st century.鈥�