Instrumented Interconnecteds Intelligent

 Charles Fishman, author of The Big Thirst, weighs in for World Water Day…and for every day.

Laurie Arthur is a farmer in the heart of Australia’s bread basket, the basin of the Murray River, who was kind enough, when I was trying to understand water, to explain how water works for farmers.

Arthur lives out in the wide open country east of Adelaide and north of Melbourne — flat, irrigated farmland where his nearest neighbor is 12 miles down the road, and where his white farm truck is often flanked by squads of kangaroos, who have no trouble keeping pace as he drives from field to field at 40 or 50 mph.

Arthur lives comfortably in a world most of us never visit, and even have a hard time grasping. He farms 10,000 acres. That amount of land is impossible to visualize, but its scale is easy to bring down to Earth.

He took me to a single 150-acre field, which seemed to spread out in all directions toward the horizon. (You could park five Wal-Mart Supercenters, including their full parking lots, on that one patch of dirt.) That single field has a perimeter of 2 miles.

It is 1 percent of Laurie Arthur’s land.

If the land Arthur is responsible for cultivating is hard to grasp, the water he uses to make it blossom it is truly astonishing.

To raise a single year’s crop, Arthur uses 1.6 billion gallons of water (6 billion liters) — a big slug of water. It’s enough to supply all the water needs for a town of 40,000 people, for a year.

One guy, with one farm, using as much water every single day as a city of 40,000 people.

Laurie Arthur has the charm and wry humor we find so irresistible in Australians — the disarming confidence that comes from being self-reliant, the bemused understanding that in the developed world, farmers are far more alien creatures than, oh, astronauts.

He has introduced himself at school parent events as a farmer, and had fellow parents turn to him matter-of-factly and say, “Oh, you’re a water waster, then.”

What is Laurie Arthur doing with all that water, anyway?

He’s raising food.  Rice, to be specific.

In a year when everything goes right, Arthur raises 20 million pounds of rice, using those 1.6 billion gallons of water.

Is that good, or is that cavalier?

Well, with enough water to supply a city of 40,000 people for a year, he raises enough food to feed a city of 100,000 people for a year — all 100,000 people, 3 meals a day, for 365 days.*

Arthur smiles. “How much is the right amount of water to feed a city of 100,000 people?”

Today is World Water Day. The point of World Water Day is to draw attention to our favorite, our most familiar, and our most taken-for-granted resource. There is a delightful irony for water folks in the fact that World Water Day is itself mostly ignored by everyone outside the world of water. (Could we start a day to draw awareness to World Water Day?)

Every person on Earth revels in water every day, in some fashion — whether we celebrate water or not.

This year, the theme of World Water Day is the connection between water and food. Although most of us never think about water when we tuck into an omelet, or a turkey sandwich, or a dinner of salad, steak and rice pilaf, there is no more intimate connection than that between water and food.

The connection is so close, that for water folks there is a handy rule of thumb: In the developed world, 1 calorie of food requires 1 liter of water to produce.

A large tomato has 33 calories — it required 33 liters of water to grow (almost 9 gallons).

A 12-ounce can of Coke or Pepsi has 140 calories — so it required 140 liters of water to produce; 12 ounces of soda requires 37 gallons of water — if you reach back and include the water necessary to raise the sugar in the soda.

A medium-sized McDonald’s Big Mac Value Meal — Big Mac, medium soda, medium fries — has 1,130 calories, so the food required 1,130 liters of water, about 300 gallons.

The standard daily U.S. diet of 1,800 calories requires about 475 gallons of water to produce — every day, for every American.

The 1-calorie-1-liter benchmark is a rough average. It takes far less water, for instance, to grow a pound of tomatoes than to grow a pound of beef.

What’s handy about the rule is that it is a great way of waking up to how much water our food requires.

The average American uses 99 gallons of water at home each day — real water, for showering and dishwashing, for toilet-flushing and making lemonade.

The average American uses another 250 gallons of water a day at home for electricity — the electricity that each American uses, just at home, requires 250 gallons a day to generate. That’s real water too, of course, we just never see it.

And the average American uses another 475 gallons of water day for food.

The food you eat each day requires five times the amount of water to create as the amount of actual water you use each day.

And that’s true for the whole world. Food — farming — is the most important part of the world of water.

Worldwide, farmers use 70 percent of the water used each day.

And farming is not very efficient. The general rule of thumb is that farmers waste half the water they put on their fields. In the world of water, that “wasted” water has a very precise meaning. It means that half the water farmers use doesn’t increase their production at all — they could, with better management, use half the water they do and produce the same amount of food. Or they could use the water they are using and grow twice the amount of food.

But that inefficient use of water is actually good news.

In the next 35 years, we’re going to add 2 billion people to the world. For every hundred people already here, we’re going to add 29 more. They are going to be thirsty, and they are also going to be hungry — which, as we’ve seen, is a form of thirst.

Current farming methods in many places are so water-inefficient that there’s plenty of room to produce more food without having to use more water.

In fact, one of the most dramatic stories comes from the farms of the United States.

Water for irrigating U.S. farms peaked in 1980 — more than 30 years ago, when there were 80 million fewer people than today.

U.S. farmers use 15 percent less total water today than in 1980, and they produce 70 percent more food. U.S. farmers have increased their “water productivity” by 100 percent in 30 years.

That’s exactly the kind of progress we need to make to have both enough food for 2 billion more people, and enough water.

So what about Laurie Arthur, the Australian farmer who uses enough water for a city of 40,000 people to produce enough food for 100,000 people?

By almost any standard measure, Laurie Arthur is doing very well.

In the U.S., remember, our food requires five times the amount of water as the actual water we drink.

In the “city” Laurie Arthur is supplying, the ratio is the opposite: The food for each person he’s feeding would require half the amount of “real” water that person would use in a typical day.

Using the 1-calorie-1-liter rule, Arthur is doing even better.   Every liter of water he uses produces not one calorie of food, but six calories.

Still, even on a well-run farm, with a man who thinks about water all the time, the water required is mind-boggling.

A single, appealing mound of Japonica rice on your dinner plate tonight requires 14 gallons of water to produce. Imagine that fluffy pile surrounded by 14 gallon jugs of water. It seems truly astonishing. But it’s a window on how removed we’ve become from the work required to get us our food — and the water, too.

Every day is world water day, we just don’t realize it.

_____________________

* If you doubt the math that 20 million pounds of rice is enough to feed 100,000 people for a year — the short version works like this. That comes to 4 pounds of rice per person, per week — and one pound of dry rice provides about 3,200 calories. So four pounds is 12,800 calories, or 1,800 calories a day. Not that you’d want to eat rice three meals a day, for a year — or that you could survive nutritionally on it. But Arthur’s point is that he raises enough calories to feed a city for a year, and he’s right.

 

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15 Comments
 
October 4, 2014
10:28 pm

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Posted by: Whitney
 
December 20, 2013
3:11 am

It�s hard to find educated people on this topic, however you sound like you know what you�re speaking about! Thanks


Posted by: Eunice Aragao
 
December 17, 2013
12:41 pm

Youre so cool! I dont suppose Ive learn something like this before. So good to seek out someone with some unique ideas on this subject. realy thanks for beginning this up. this web site is one thing that’s wanted on the internet, somebody with slightly originality. helpful job for bringing one thing new to the web!


Posted by: Trevor Delawder
 
December 8, 2013
10:52 am

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We are looking to partner with like minded individuals/companies with our products to help the world. Awaiting your reply.


Posted by: water dispenser singapore
 
July 30, 2013
3:15 am

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July 29, 2013
3:10 am

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July 28, 2013
6:31 am

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Posted by: Silva Acevado
 
July 26, 2013
3:57 am

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Posted by: Donna Mckoy
 
July 25, 2013
8:34 am

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Posted by: Amos Pers
 
May 11, 2012
2:16 am

Really liked the article. Very balanced. The connection between water use and calories was very interesting


Posted by: Alex
 
May 10, 2012
1:00 pm

As a landscape services provider, we spend considerable time thinking about how to more efficiently use water on the properties we design, build or take care of. The cool thing is what Charles Fishman advocates for is making a difference. More frequently customers turn to us today for advice on smart controllers, drip irrigation, use of recycled water, drought tolerant plants or bio-swales. So kudos to Charles for helping bring water efficiency into sharper focus.


Posted by: Dennis Kaiser
 
April 26, 2012
3:38 am

Great post… it’s all to easy to be awed by the amount of water being used in production, and yes, there is a lot we can improve. But the production is done for a reason, water is a key resource and therefore it’s not enough just to revert to yet another one dimensional view, however important the issue is.

But, everyone of us can actually DO something. Saving water daily is of course the #1 action. Sensible consumption another (so much food is thrown away daily,,, this is not just for the food a pity, let’s think also about all the wasted water and energy in production which goes down into the trash!).

And then – we all can help research. Now, just a click away:
The World Community Grid is an easy and cool way for all of us to support e.g. Computing for sustainable water
http://www.faculty.virginia.edu/CFSW/


Posted by: Peter
 
April 25, 2012
5:18 pm

Wow, this made a big impression on me – “A large tomato has 33 calories — it required 33 liters of water to grow (almost 9 gallons. ” Next time I eat a tomato I’ll have more respect for the limited world resources it requires especially given how little clean water most of the earth’s population must live on. This is really important work. I am thankful it is going on.


Posted by: Nora
 
March 29, 2012
5:12 am

zhang san fen yi jie you


Posted by: hollister
 
March 22, 2012
11:08 am

Australian rice farmers only survive because of water licences allocated in the 1980s and early 1990s.

The allocation of these licences created a multi-billion dollar trading industry out of the world’s most important natural resources – and one of only a few that Australia seems to lack in abundance.

Rice is one of the most water-demanding crops (on a calculation of production dollars against water used). Australia is not a “wet” country. I have an image of a barren outback – not a monsoonal swamp.

So, why do we grow rice in Australia? Because some farmers managed to convince the government South Australian government of 30 years ago to grant them water licences. The other states eventually followed suit. This free “allocation” was worth over $30 billion per year (in today’s terms) and is the sole reason that the rice-growing industry even exists today. Like many other Australian production industries, it is only competitive with a significant government subsidy.

See further, a study by the Australian National University: http://news.anu.edu.au/?p=547


Posted by: Michael
 
1 Trackback
 
March 22, 2012
12:29 pm

[...]          To finish reading this essay, click here. It is cross-posted with IBM’s SmarterPlanet blog. [...]


Posted by: In Honor of World Water Day, Meet a Guy Who Uses Enough Water for a City of 40,000 People – News Watch
 
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