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|SUSTAINABLE LIVING- Water Becomes the New Gold Standard|
|Written by Shawn Dell Joyce Creative Syndicate|
|Thursday, 16 August 2012 05:12|
CREATIVE SYNDICATEOur culture needs to use water more wisely to face coming shortages.
As a teen, I remember using all my strength to open a giant valve in a ditch that diverted part of the Rio Grande River into my grandparents' citrus orchards. The brown water would bubble up from the valve and flood into the orchards following the little trenches I made with a hoe. This method is called flood irrigation and is the least efficient way to use water. Yet 93 percent of the world's farmers irrigate their crops using this method.
In my younger days, I would never believe that the mighty Rio Grande would ever dry up. Yet today it does not always reach the sea, along with the Nile, Ganges, Colorado, and many other rivers.
Westerners seem to take water for granted on this sparkling blue planet. Yet less than 3/1000s of 1 percent of all fresh water is available to us humans. The rest is locked tightly into ice or buried too deep for our powerful pumps to reach, according to the United Nations. We still manage to use over a quarter of the earth's total fresh water in natural circulation, much to the dismay of our fellow creatures. But even that doesn't slake our thirst. Worldwide demand for water has tripled over the past 50 years as the world's population has doubled. Millions of wells, powerful diesel pumps, and the diverting of streams and rivers are drawing down the water table below the natural recharge levels. To put it bluntly, we are using up our children's water today. What will we leave for our grandchildren to drink?
Humans need less than two gallons of water per day for drinking and cooking. Yet we must have a thousand gallons more to grow our food. In affluent societies like ours, where meat is a primary staple, we need 2,000 gallons or more per day just to feed one person. Agriculture ties up about half our water, mostly to grow grains to feed animals. It takes about a thousand tons of water to produce one ton of grain. It is much cheaper to import grain than to grow it where water is scarce. Many countries that are running low on water have become grain importers, so they don't have to tie up precious drinking water for agriculture. Our country is still a grainexporting country but at a great cost to our future generations. Our water is subsidized, so most big agro-giants don't pay the real cost of water. Some California large-scale farms buy water at $5 per acre-foot, while the government estimates the real cost is more like $40 per acre-foot.
What isn't factored in is that most of that water comes from fossil aquifers underground like the Ogallala Aquifer, which underlies most of our grainproducing states. This aquifer is drawn down at a rate of about 10 feet per year and recharged at a rate of a halfinch per year. Two-fifths of our feedlot cattle are fed grain made of Ogallala water. Amory Lovins, efficiency guru from the Rocky Mountain Institute, points out that "growing that feedlot steer consumed up to a hundred pounds of eroded topsoil and 8,000 pounds of Ice Age vintage groundwater."
As water becomes the new "gold standard" around the world, we begin to see water being used more efficiently. In our country, water efficiency is improving faster than energy efficiency as municipalities and farmers begin to address shortages. Like energy efficiency, the biggest gains are made by taking the simplest steps. Just by using drip irrigation and sprinklers, we could save enough water to meet the needs of the expanding population.
|Last Updated on Thursday, 16 August 2012 05:13|