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http://www.slate.com/articles/techno...d_farming.html
DENAIR, Calif.—In California’s vast Central Valley, agriculture is king. But the king appears fatally ill, and no worthy replacement is in sight, as the area noticeably reverts into the desert it was little more than a century ago.
Signs line the back roads here that run parallel to wide irrigation ditches:
“Pray for rain”
“No water = No jobs”
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As I’ve already discussed in the Thirsty West series, city-dwelling Californians are a bit insulated from near-term water shortages thanks to the state’s intricate tentacles of aqueducts, pipelines, and canals that divert water from the snowcapped Sierras to the urban core along the coast. Rapid population growth looms ominously, but for now, you’ll still be able to brush your teeth in Oakland and Burbank.
By all accounts the current water crisis is far more urgent in the sprawling fields of the Central Valley. And that’s bad news for those of us who enjoy eating daily. Two simple facts explain why: California is the most productive agricultural state in the union, and agriculture uses 80 percent of California’s water. In a year with practically none of the stuff, that’s enough to send ripple effects throughout the country.
California is the nation’s leading producer of almonds, avocados, broccoli, carrots, cauliflower, grapes, lettuce, milk, onions, peppers, spinach, tomatoes, walnuts, and dozens of other commodities, according to a 2012 Department of Agriculture report (PDF). The state produces one-third of our vegetables and two-thirds of our nuts and fruits each year. While fields in iconic agricultural states like Iowa, Kansas, and Texas primarily produce grain (most of which is used to fatten animals), pretty much everything you think of as actual food is grown in California. Simply put: We can’t eat without California. But as climate change–fueled droughts continue to desiccate California, the short-term solution from farmers has been to double down on making money.
Like many Americans, I’d never visited California’s ultra-productive Central Valley before my monthlong drought-themed road trip for Slate. I wasn’t quite sure what to expect besides lots and lots of fields. Having grown up in a small town in Kansas and living now in the heart of Wisconsin’s dairy country, I’m plenty familiar with agriculture, but I’ve never seen anything remotely resembling the scale on which it’s practiced here. Agriculture here isn’t the endless fields of corn and wheat of my childhood. Thanks to California’s unique climate, fields here are comprised almost entirely of high-value cash crops.
Driving northward along California state Route 99 from Bakersfield to Fresno, we passed mile after mile of almond orchards, vineyards, and warehouses. There were enormous piles of hay on dairies the size of small towns. Citrus plantations extended to the horizon. And between them all was a crisscrossing network of irrigation ditches, most of which were dry. Coincidentally, this rural highway also bisects the heart of California’s current mega-drought, in which three-quarters of the state is currently rated “extreme” or “exceptional” by the USDA and National Oceanic and Atmospheric Administration. It’s pretty easy to see why this place is the epicenter of Western water issues. I ended up spending more time here than in any other stop on the trip.
Farmers in California are forced to irrigate because of a fundamental seasonal mismatch: The vast majority of the rain and snow comes in the winter and the best growing conditions (sunlight, warmth) of California’s temperate Mediterranean climate are in the summer.
This year, farmers have to make important decisions—and it often comes down to money. If given a choice between keeping fruit trees alive (which take years to mature and can bring 10 times more money per acre), or planting rows of vegetables that live only a few months, that’s a no-brainer if you’re trying to maximize profit. This year, farmers are fallowing vegetable fields and scrambling to save high-dollar fruit and nut orchards. The result is counterintuitive: In the midst of the worst drought in half a millennium, the most water-intensive crops are getting priority.
California almonds use a stunning 1.1 trillion gallons of water each year, or enough for you to take a 10-minute shower each day for 86 million years (using a low-flow showerhead, of course). Here’s the calculation: California as a whole diverts or pumps 43 million acre-feet of water each year to supplement its meager rainfall. In total, agriculture consumes 34 million acre-feet of that. (An acre-foot is just what it sounds like: the amount of water needed to cover an acre of flat ground up to a foot, or about 325,000 gallons of water.) In 2013, there were 940,000 acres of almonds in California, according to the USDA (PDF). Each acre of almonds uses three to four acre-feet of water each year, most of which are delivered via river diversions or groundwater.
Almonds alone use about 10 percent of California’s total water supply each year. That’s nuts. But almonds are also the state’s most lucrative exported agricultural product, with California producing 80 percent of the world’s supply. Alfalfa hay requires even more water, about 15 percent of the state’s supply. About 70 percent of alfalfa grown in California is used in dairies, and a good portion of the rest is exported to land-poor Asian countries like Japan. Yep, that’s right: In the middle of a drought, farmers are shipping fresh hay across the Pacific Ocean. The water that’s locked up in exported hay amounts to about 100 billion gallons per year—enough to supply 1 million families with drinking water for a year.
Though economics drive the seemingly improbable logic of California’s water exporting, that’s no reason to rush to boycott almonds. As this viral infographic from Mother Jones shows, it takes more than a gallon of water to grow a single almond, and it may take 220 gallons of water to produce a large avocado. But pound-for-pound, there’s an order of magnitude more water needed to get meat and dairy to your plate. A stick of butter requires more than 500 gallons of water to make. A pound of beef takes up to 5,000 gallons. More than 30 percent of California’s agricultural water use either directly or indirectly supports growing animals for food. (As Slate’s L.V. Anderson recently wrote, one of the single most effective actions to combat climate change would be if everyone in the world went vegetarian overnight. It would also likely wreck our economy.)
Later this year, as the effects of California’s drought reverberate through America’s supermarkets, they’ll be what amounts to a de facto water tax: The biggest price increases will be found with some of the most water-intensive crops.
Farmers here are turning to groundwater to make up the difference—and that’s where things get worse. The shocking truth is, California is the last state that doesn’t regulate groundwater pumping, even as supplies are dwindling. That means the motto around here right now is, to borrow another Mother Jones headline: “Drill baby drill (for water, that is).” In some overpumped places, the ground has already sunk by dozens of feet. There are indications that the debate could be changing. In April, a series of conservation bills were presented in the state Senate, with the intention of using the current crisis to address the issue of slipping groundwater supply.
The stakes are so high and the backlog for new water wells is so long that some farmers are buying their own million-dollar drilling rigs, just to protect their massive investments. Wildcatting drilling crews are working 24 hours a day to keep up with demand.
California will never solve its water crisis if the aquifer keeps getting more and more holes to extract groundwater. But in dry years like this one, the state’s agriculture would almost cease to be without groundwater. One short-term answer is more efficient methods, like drip irrigation. The problem is, irrigation technology has gotten so good that typically the end result is increased yields. And the more efficient the irrigation, the less water gets into the soil for groundwater recharge.
While agriculture isn’t a monolith, you’d think an industry dependent on water would be fighting for its survival by addressing the core of the problem. Yet some subsets of the industry seem to refuse to accept the new reality.
