Three of the fundamental and basic human needs - food, water and shelter - have in the past century all become critically and increasingly dependent on technology and the fossil fuels that power it - at least in the developed world but also to a lesser and growing extent in the underdeveloped and developing world. These three needs will, as we pass peak oil, become the three sisters of global but uneven social collapse. Peak oil alone would make that a serious problem but they are also each going to be heavily impacted by the progression of anthropogenic or man-made global warming. Both of these serious global problems, it now appears, will occur at roughly the same time, seriously increasing the risk in these three critical areas. The whole in this case is definitely greater than the sum of the parts.
The predominant focus of debate around the peak oil issue is still, unfortunately, centered on energy itself; endless debate over when oil will peak; obfuscation over sweet versus sour versus synthetic crude, debate over the minutiae of various alternative energy options; the price of gasoline/petrol, etc. That is as much a form of denial within the peak oil community as that practiced by energy executives, politicians and the mainstream media. Peak oil is not about the oil! Focusing on the energy itself is safe, makes one appear to be aware and involved while successfully avoiding dealing with the disastrous implications of that peak and decline. Keeping the focus on energy is a self-perpetuating debate by setting up easy deniability for energy executives and their paid-for politicians, allowing them to attack the variability and imprecision in the various peak oil estimates. That in turn facilitates their continuing the climate of endless disinformation that easily serves as a smokescreen and a roadblock to beginning the increasingly critical process of preparing for the transition away from fossil fuels, a process that should have begun with the 1970s oil shocks if not earlier when the concept of peak oil was first introduced by M. King Hubbert in the 1950s.
But that transition is not or should not simply be a question of finding a workable alternative for our profligate use of oil and the other fossil fuels to power our modern society in the style to which we have become accustomed. That is, or should be, an impossible dream. Put simply, how could we move a world consisting of 6.6+billion people, 1+billion automobiles, hundreds of millions of trucks, buses, trains, planes, ships and heavy equipment, trillions of dollars of energy-dependant infrastructure and 300,000+ products at least partially made from or derived from oil and other fossil fuels into an era of declining fossil fuels that will be effectively devoid of those fossil fuels (from an EROEI perspective) within a century without impacting that society? The answer? We can't. As we approach peak oil, however (if we have not already arrived there and moved beyond it, as I believe we have), rather than dealing with that question and getting on with the transition and the massive and sometimes traumatic changes it will entail, we continue to increase our reliance on fossil energy and technology in these three areas of basic need.
The bulk of the food produced in the world today (and the foundation of the artificial carrying capacity, created as part of the Green Revolution, on which our massive surplus population survives) is very much dependant on heavy duty agricultural machinery driven by fossil fuels, massive applications of artificial fertilizers and pesticides produced from fossil fuels, on energy-intensive GMO seeds (as much as 70% of the crops we eat are now produced using GMO seeds), on the major, energy-intensive global distribution network that gets them to the farmers and the food they produce to your table, and on irrigation facilitated through powerful, fossil-energy-dependant pumps extracting water from both surface water (lakes and rivers) and groundwater (aquifers) sources (globally 70-75% of our freshwater usage is for agricultural irrigation). The building global food crisis - food riots have already occurred in several countries such as Egypt and Haiti and are probable in many more as this year progresses, and in many of the world's poorest nations food purchases already consume 50-90% of the average person's meagre income - is not so much a problem of insufficient food or even insufficient land on which to grow it. The problem is rapidly decreasing global agricultural productivity, a result of a staggering annual global loss of topsoil from erosion, toxification and salinity and a rapidly growing deficiency in soil fertility, largely a result of industrialized, petrochemical-intensive agriculture and decades of serious overcropping.
Soil fertility is produced by millions of soil micro-organisms which are all being decimated by our profligate and dangerous overuse of agrochemicals. Soil erosion and other forms of land degradation, in fact, now rob the world of 70-140,000 square kilometers per year of farm land. The total world availability of topsoil is estimated at 7,000 gigatonnes - about seventy years of topsoil at current rates of destruction and loss according to a U.N. estimate. The peak slaughter of these critical soil organisms will occur concurrent with peak oil and at the same time, therefore, that our global need for natural soil fertility will begin a dramatic increase. Globally, food availability, especially for the poor - the global emergency food grain reserve, as I detailed in my article Biofuels: Recipe for Artificially-Induced Overshoot of Earth's Carrying Capacity, has shrunk over this past decade from a marginal 120 day supply to a sub-critical 53-55 day supply [5] - is further exacerbated by the rapid increase in meat consumption in the world's major developing nations like India and China and in the frantic push toward biofuels in the rich, western nations, biofuels being produced from those already diminishing global stocks of food grains.
The vast majority of new water and irrigation projects in this past half century have been reliant on the use of powerful pumps to extract water from underground aquifers (many of which are non-replenishable, like the heavily-exploited Ogallala Aquifer in the U.S. midwest, and the majority of which are being drawn down at levels well above their replenishment rate - many of the world's major aquifers, both replenishable and non-replenishable, are declining by more than twenty feet per year), desalination plants heavily dependant on fossil fuels (this same desalination technology may soon have to be used on water drawn from coastal aquifers, like those in many nations in the middle east, which are becoming increasingly contaminated from saltwater intrusion because of excessive drawdown), powerful, energy-intensive irrigation equipment for irrigating large monoculture fields, desperate increases in agricultural development in arid areas, marginal lands and even deserts. It is a common fallacy, particularly in most of Europe and North America, to think that our supplies of fresh water are somewhat infinite. The reality is, as the report UN Highlights World Water Crisis outlines, "Despite the fact that 75 percent of the Earth's surface is covered by water, only 2.5 percent of it is fresh water, and three-quarters of that is locked up in glaciers and permanent snow cover. Only 0.3 percent of the water is surface water, found in rivers and lakes. The rest is buried deep in the ground."[6] The general lack of awareness of the limits of earth's easily-accessible freshwater resources leads to dangerous over-exploitation and abuse. Imagine the energy crisis we would be looking at if only 2.5% or 0.3% of the oil in the world were accessible, recoverable and usable and the cornucopean energy executives had been reassuring us for decades that it was all recoverable. It wouldn't much matter if there were people saying this wasn't true and that a crisis is coming. There is an unfortunate tendency for people to believe - and even go out of their way to find - those who are telling them what they want to hear, that there is no problem.
The infrastructure (using the broadest, social definition of infrastructure) on which our modern societies are so dependant (including the homes in which we live) has primarily been constructed in the past half century, most of it with a designed life span of fifty to seventy-five years (will all of those mass-produced McMansions really last that long?), built of materials that are derived from or dependant on fossil fuels, and requiring heavy fossil fuel inputs in their maintenance, upkeep and demolition. "There's a tremendous need," said Larry Roth, a professional engineer who is deputy executive director of the American Society of Civil Engineers. "Not only are we not keeping pace with growth, but we're not keeping pace with the maintenance that's required. As a result, our infrastructure is simply crumbling."[1] Most of this infrastructure will achieve and surpass its designed life span just as we pass peak oil when the natural resources (Mike Stasse, owner and moderator of ROEOZ, in his excellent paper, What Went Wrong, calls it natural capital) to replace it will no longer be available, when the energy, materials, finances, trained people resources and technology required to maintain it will no longer be available, and even when the technology and resources to decommission or demolish it are becoming increasingly unavailable (how do you tear down a fifty storey steel and glass tower before it falls down, or decommission a massive dam before it collapses and possibly kills hundreds of thousands or even millions of people?). The costs of infrastructure maintenance, always underestimated, are sobering. “We have a major infrastructure problem in this country,” said Maureen L. McAvey, an executive vice president with the Urban Land Institute, which recently published a report on global infrastructure issues. “The civil engineers have estimated that we have a $1.7 trillion shortfall in this country [U.S.A.] alone”[2]. And the growth of this deficit is very likely to accelerate as the growth economy grinds to a halt. Maintenance is almost invariably the first place that budget managers look for cuts when finances get tight.
Much of the money that needs to be spent on preparing our society for life beyond fossil fuels in the areas of food production, water usage and infrastructure maintenance, replacement, decommissioning and rebuilding, is being drained off paying for the increasing cost of supporting our car-centric mobility and our energy-dependant lifestyle. Oil prices - as well as the cost of other fossil fuels and the cost of almost everything as everything is at least partially dependent on the cost of oil and other fossil fuels - have increased dramatically over these past several years as we are increasingly dependent on more expensive and more technologically-challenging sources of energy. Shawn McCarthy, in his Toronto Globe & Mail Report on Business article, Oil peak theorist warns of chaos, war, writes, "The average cost of producing a barrel of oil has more than doubled in the past eight years, with most of that increase occurring in the past four, he[Matt Simmons] said."[3] The fossil-energy story doesn't end at oil, however. Natural gas is also fast approaching peak and prices are increasing in lockstep with the price of oil. And Richard Heinberg reports, in his article Burning the Furniture, "A soon-to-be-released study by the Energy Watch Group in Germany [the report has now been released] on the future of global coal supplies has implications so surprising and far-reaching that energy policymakers may take years to digest it. ..... The report’s central conclusion is that minable global coal reserves are much smaller than is commonly thought, and that a peak in world coal production is likely within only ten to fifteen years."[4]
Much of the misinformation and disinformation surrounding these three primary issues centers on the complexity of quantity versus quality. GMO crops, despite constant claims otherwise, produced with massive applications of artificial fertilizers and bombarded with herbicides and pesticides simply do not have either the taste or nutritional value of natural foods produced with non-chemical, organic methods. GMO seeds, particularly with the boost of global climate change, may produce larger plants and higher yields per acre but the result is like sugar- and salt-laden snack foods. The bulk is there but they are devoid of nutritional value. Like those snack foods, the more you eat the hungrier you get. The world is also lapsing into a global food allergy crisis as our digestive and immune systems struggle to adapt to relying on these unnatural foods for our nutrition.
Over one fifth of the global population today do not have access to clean drinking water. As many as a quarter of the deaths in poor third world countries is caused by water borne diseases, most commonly and crtically dehydration from diahrea caused by contaminated water. Another one fifth of the world's population only have access to one quarter to one tenth the amount of drinking water that the U.N. has established as the daily minimum requirement, and not enough water for basic hygienne. This problem worsens with each passing year. It is estimated that the majority of the global population increase over the next half century will be in areas already struggling with critical water shortages.
The glut of infrastructure development over this past half century has neglected durability and survivability in favour of speed, ease and cost reduction of construction. Sprawling suburbs of cookie-cutter houses and strip malls have grown like a cancer outward from established urban centers which are all expanding outward toward each other, gobbling up the low-density rural spaces between them. Cities have rapidly evolved over this past century into morbidly obese mega-cities covering thousands of square kilometers of concrete entombment.
It is difficult for many to understand why and how food, water and infrastructure can form the foundation of global social collapse without first gaining an understanding of the individual contributors to that collapse, the small details and problems which by themselves may seem meaningless but when combined together do build to a monumental crisis that can and will engulf the entirety of global society. This is further complicated by a general and understandable uncertainty as to the relative timing of peak oil and the subsequent decline in oil and other fossil fuels and the progression of global waming/climate change. But variability in timing ultimately affects only the severity of the challenges at any point in time. The following is by no means intended as a complete list of these problem areas but rather a representative sample.
....Over this past half century the vast majority of small, regional seed companies (many specializing in maintaining rare varieties of crop seeds) have disappeared, gobbled up by multinational companies like Monsanto, Cargill, Dupont and others. This has resulted in a rapid decline in genetic diversity as these large multinationals focus on their favourite varieties on the basis of business economics. It has also, however, made seed production a centralized industry dependent on the global distribution system, often with global seed production concentrated in either the northern or southern hemisphere, out of sync with the seasonal seed needs of the other hemsphere. This has made global agriculture and the seeds on which it relies a handmaiden of the global economy and, with centralized production and global distribution, the global energy situation. It's not just a question of reactivating and regrowing the small regional seed companies. The biodiversity of the available seed line will not be sufficient to accomodate the needs of regional climate and soil diversity. The risk and impact of crop loss with an increasingly limited global emergency food reserves is often discussed. Rarely considered, however, is the globalization of that risk if the crops being lost are the seed production of these centralized seed production companies. A major crop loss in one area, without redundancy built into the global seed production system, could suddenly wipe out the needed seed supply of much of the world. Similarly, with the drastic reduction of crop biodiversity under the control of multinational seed companies, the risk of a sudden susceptibility of a particular, widely-used variety of crop could leave much of the world with no usable fall-back variety.
....Global demand for food crops continues to rise. This is due to continued increases in the global population (more mouths to feed), global changes in food and nutrition requirements (more people turning to meat as their source of protein), more and more food crops being diverted to the production of biofuels. The problem arises from the fact that the demand for the resources required to grow that food do not rise at the same rate. While the population has tripled over the past century the usage of fresh water ras risen over six fold and the water for agriculture over eight fold. In the past twenty five years alone global use of fertilizers, pesticides and herbicides has grown by an amazing thirty-three times. The amount of energy involved in food production has grown exponentially over this past century to the point that for every calorie of food energy produced and consumed more than ten calories or energy input Are required. Food miles traveled by food produced has gone through the stratosphere this past half century with food travelling now more thasn 1500 miles between field and table. Topsoil loss has grown dramatically over this past have century because of serious overcropping, erosion from irrigation and bare-field tillage, losses due to chemical toxicity and salination. Resource consumption and depletion involved in producing those ever greater quantities of food, therefore, is dramatically greater than the additional food produced.
....There was a time not that long ago when for practically ever farmer, regardless of the crop produced, saving and storing his own seed was still standard practice, and more recently still was in the underdeveloped and developing world. This localised, cultural practice of seed saving was a key component of food crop biodiversity around the world, with local varieties of the same crop genetically evolving independent of the same crop in other parts of the world. With the insidious spread of GMO seeds this critical component of biodiversity is disappearing. Everyone in agriculture knows the tremendous cost and complexity of taking on the big multinational seed companies when their seed cops invade your property and accuse you of saving seeds from their crop when your own crop has been cross-contaminated from crops of neighbouring farmers using their patented seeds. The use of GMO seeds is so ubiquitous that the ability to prevent cross-contamination of your own crop, a product of generation after generation of careful seed saving, is very slim. Often their own carefully-saved seed turns out to be sterile after cross-contamination from a GMO containing a terminator gene, a gene inserted to prevent the plant from producing seed or to cause it to produce a sterile seed so the plant can't be reproduced from its own seed, this securing the dependence of the farmer on the seed company. Even those farmers who are trying to hold out against the seed giants are finding their crops contaminated and the courts consistently come down in favour of the big multinational seed giants.
....With the bulk of modern agricultural crops being produced from GMO seeds restrictively produced in one area of the world and shipped all around the world from that one point, the production of the world's food is becoming rapidly and increasingly dependent on the health of the global economic system. This will make the next depression, when it happens, so much different from any past depression. In severe economic downturns of the past, or in times of war and heavy civil unrest, people would quickly revert to producing their own food and this was very often the key to surviving the hard times. Even if you have a crop today, the chances of your continuing to produce a crop in the event of a severe economic downturn or social chaos are extremely slim because your crop probably will not produce a usable seed and the seed company will very likely have fallen on hard times as the economy implodes. Where is the food to come from if no one is saving seeds, the small regional seed companies no longer exist, and the multinational seed companies that produce all the seed and the global distribution system that gets them to the farmer go out of business in an economic downturn?
....The bulk of the commercially produced food crops in the world (as opposed to the personal garden) are produced with the use of specialized, heavy farm equipment. With the exception of some of the equipment available in some third world nations, the equipment needed for small scale farming, the equipment meant to be used with human or animal power alone, the equipment that our ancestors used a century ago simply no longer exists, nor do the companies and the manufacturing equipment to produce it. Most of us have seen a piece or two of such equipment rusting beside a barn or planted with flowers on a suburban lawn. If the coming energy-decline economic downturn is very slow and very gradual and business, industry and government act with foresight, and the raw resources to do so are available, it is possible that the production of such equipment can be revitalized and ramped up in time to prevent an economic recession or depression turning into a critical global food crisis. That is a lot of ifs that are extremely unlikely to all come together in the right way and at the right time.
....There is an old and, at one time, frequently used expression that somewhat pinpoints the agricultural crisis that awaits us on the other side of peak oil: dirt farmer. Today's farmers are mostly chemical farmers and machine operators (I apologize to any legitimate dirt farmers who take umbrage with that generalization). When the fertilizers and pesticides are no longer available and the tractor and combine and electric milking system no longer function most of today's farmers will be as ill-equipped for farming as the person born, raised, and having spent their entire lives in the inner city. It is a common fallacy to think that when the machinery stops running we'll revert to labour-intensive manual farming as more and more people get involved, as workers, in the production of the food they consume. But who is to teach them what to do? Who is to teach them how to work a field of crops without the aid of machinery? Who is to show them the difference between a seedling of a food plant and the sprout of a weed? At the beginning of the last century as much as 50% of the population were involved in the production of food. Today that is less than 2%. Getting from here to non-chemical, non-mechanized, non-industrial, labour-intensive farming is going to take decades of rebuilding the skills and knowledge bases that will be needed. Trying to do this on the other side of peak oil, when the ability to absorb years or decades of non-productive trial and error doesn't exist, could be truly devestating.
....Along with the disappearance of local seed companies this last half century has also seen a wholesale collapse of the local grain storage and milling business. There was a time that virtually every small agricultural community had a small-scale miller where local farmers would take their seed to; be stored; turned into animal feed; turned into flour; pooled and shipped to centralized grain terminals, stored (and often mixed with that of other local producers) as seed for next year's grain crop. Local bakers would get the flour they used from the local miller. Often the miller, generally a grain farmer himself, would take as payment a set amount of the grain he was given to mill or the product he produced from that milling. Often miller and baker were one in the same. My small town had such a mill until twenty years ago. Now all of the grain produced goes into the impersonal national and global distribution system. The chance of the grain produced in an area even ending up on the tables of local residents is extremely slim. Once the distribution system begins to break down and the large, centralized milling companies begin to falter because of operating costs, lack of feed stock and lack of markets, how are small scale grain producers to have their grain processed into flour and seed? It could take a decade or more to revitalize and rebuild the local milling industry.
....Tomatoes in February. Ice-cream in July. New Zealand spring lamb and kiwi fruit in Toronto. Canadian maple syrup and bacon in Sydney Australia. Our food and our food tastes are a biproduct of a global food distribution system that is critically dependent on high-volume, long-distance shipping and energy-intensive refrigeration both in shipping and in general storage. When I was a child we had a root cellar for over-winter cold storage of root crops, nuts, grains and certain other fruit and vegetable crops. In addition we had an extensive food storage cellar that got restocked every fall with preserves and canned (meaning bottled) vegetables and fruits, dehydrated vegetable fruits, and a host of other preserved foods. Much of the food preserved we grew ourselves but that which wasn't was purchased locally and grown locally. When the global food distribution system begins to break down on the other side of peak oil, when energy-intensive refrigeration is no longer available for storing food after the harvest, when the materials such as mason jars, crocks, sterilizing equipment critical to canning food, when the supermarkets can no longer be looked upon as the primary source of the family's food, how will people manage? How will you manage? It could take a decade or longer to reaquire the skills and equipment and storage facilities necessary to ensure your family has food to eat at any time of the year.
....Over the last half century while much of the world has become increasingly dependent on groundwater from aquifers (97% of the world's liquid freshwater) for drinking water, industry, agricultural irrigation, and frivolous usage such as golf courses and casino fountains, the would's fresh surface water resources (lakes and rivers) have become increasingly contaminated with chemical toxins and aghricultural runoff. Although surface water is part of the global hydro-cycle and the water in the surface water systems turns over in a matter of days (water in aquifers is trapped there for, on average, 1400 years) the toxins in those systems build up in bottom sediments and continue to keep the water above toxic. It could take decades or even centuries for nature to remove the toxins that have built up in contaminated surface water systems. This is a matter of critical importance as we pass peak oil. Our ability to rely on deep aquifers for our fresh water (most shallow aquifers have already been sucked dry or have become contaminated in the same way and at the same rate as surface water), most of which are already heavilly over-exploited and declining by twenty feet or more per year, will disappear as the electricity and fossil fuels to run the massive pumps that are needed to draw water from these deep aquifers gets increasingly scarce and unreliable. Hand pumps - there were four of them within 200 yards of the home in which I grew up on which we relied for water in our plumbing-void house - are genrally not powerful enough to draw water from deep aquifers. Hand pumps are also a very scarce commodity in our industrialized society. This could place much of the world in the same position as one fifth of the world's people already are, having to rely on contaminated, chemically-toxic, disease-laden surface water and shallow aquifers for not just agricultural irrigation but for industrial use, basic hygienne and drinking water. The rate of incidence of death from water-borne diseases, which already claims millions every year, will most certainly increase exponentially.
....Vast tracts of homes have been constructed over this past half century in our industrial society. They are built to standards that assume there will be sufficient fossil-fuel and electrical energy to maintain heat to a level of 70F degrees or higher in winter and cool them to a comfortable 70F or lower in the heat of summer. Without this high-energy input those homes, more and more with sealed windows, do not have the insulation and thermal mass levels needed to maintain a home within livable standards. When the seriously-aging and materially-crumbling grids fail, even sporadically, and the fossil fuels are not available, sporadic, or priced beyond the reach of the average household, the vast majority of our modern homes will become increasingly problematic. To upgrade them all (hundreds of millions of them) to a thermal standard able to cope with the coming declines in fossil fuels will not only prove very expensive but will probably run up against increasing material shortages as available resources decline. And we most certainly aren't going to be able to think in terms of buldozing he suburbs and starting over again with housing suitable to a world of steadilly decreasing energy.
In what has become known as The Hirsch Report (commissioned by the U.S. congress and co-authored by Hirsch) [7] Robert Hirsch adamantly makes the point that it would take a minimum of 1-2 decades to prepare for the energy crisis presented by peak oil, if that effort were begun before peak oil arrived. That may already have become a moot point as we may already have passed that point with no such preparation having yet been done. But the energy crisis represented by peak oil, as I have tried to show here, is a small portion of the problems that peak oil will create or seriously exacerbate. Where preparation for the energy crisis may take 1-2 decades preparing for the parallel food, water and infrastructure crises could take many times that, could be 1-2 centuries rather than 1-2 decades with the same qualifier, that the effort is begun before peak oil, and with the additional qualifier that priority usage of the world's remaining fossil energy reserves be given to this effort. We spent the first half of the world's fossil fuel reserves creating the world as it is. It will take the other half to recreate the world as it will need to be to be workable without those fossil fuels.
===========================
1) Is aging infrastructure slowing the U.S.?
2) Engineers See Dangers in Aging Infrastructure
3) Oil peak theorist warns of chaos, war - Shawn McCarthy, Globe & Mail - Report on Business
4) Burning the furniture by Richard Heinberg
5) Biofuels: Recipe for Artificially-Induced Overshoot of Earth's Carrying Capacity
6) UN Highlights World Water Crisis
7) Peaking Of World Oil Production: Impacts, Mitigation, & Risk Management
Showing posts with label global freshwater crisis. Show all posts
Showing posts with label global freshwater crisis. Show all posts
Monday, April 14, 2008
Saturday, March 22, 2008
Mining Water
(See also my articles Peak Water and The Emerging Global Freshwater Crisis in this blog.)
The term "mining water" is increasingly used to refer to the extraction of groundwater, usually by pumps, from underground aquifers. Get used to the term. At the rate we are polluting our surface water in lakes and rivers and the rate at which freshwater sources are drying up under the assault of global warming and human development it may soon be the only potential source of clean drinking water we or our children and grandchildren have left. It is an appropriate term in many ways.
Water is a finite resource that is constantly recycled - like the metal in beer cans - and many of the underground aquifers from which we extract it are non-replenishable, meaning once it is gone, like a vein of ore, it's time to shut off the pumps and go home or move on to another aqua-motherlode. Even those aquifers that are replenishable, however, have a long-established, generally-low rate at which they will replenish ("Water that enters an aquifer remains there for an average of 1,400 years, compared to only 16 days for rivers."[5]. Extract more water than the rate at which it will refill and you start the process of depleting, and possibly irreversibly damaging, the reservoir. The land over many aquifers that have been over-exploited shows clear signs of sinking and compression due to the underground void left as the water is extracted.
Changing weather patterns generally, and the more pronounced changes being brought on by global warming, and the persistent human habit of draining marshes and wetlands for development, many of which are the source of replenishment for underground aquifers, are also changing the rate at which many aquifers replenish, usually negatively. Unless aquifer replenishment rates are tracked with changes in the climate and local development ("The Yellow river in China, Colorado River in North America, and the Murray River in Australia are amongst the Earth's major rivers that are regularly sucked dry.")[1], those dependent on an aquifer for water may find their wells suddenly going dry even though they have not increased their water extraction.
There is another aspect to the term "mining water" that is particularly worrisome for the future. Water rights to surface water in most areas today require a water rights license, even if the water runs through or touches your property. That license spells out what source of water you have access to and how much water from that source you are permitted to use. If the term and concept of "mining water" works its way into government bureaucratic lexicon you may also need a license to access the groundwater beneath your own property - some jurisdictions already require it - a license that similarly specifies how much of that water you have a right to use. In international trade agreements, and in the conditions attached to IMF and Worldbank loans to developing countries, water services and water rights are a commodity that is increasingly required to be open for commercial trade. It is possible, as clean surface water sources become increasingly scarce, that your groundwater may become an important tradeable commodity for which you are going to have to compete against the highest commercial bidder. With the majority of aquifers already under pressure from over exploitation governments everywhere may decide that growing demand for commercial groundwater access is exactly why there is a need of government control and private access restriction.
For me, in addition, the term also has a strong personal meaning which, I believe, clearly illustrates a broader issue. The southeastern Ontario community I grew up in was a mining town. A mile southeast of home, the constantly-growing, flat-top mountain of slag clearly visible from anywhere in town and the surrounding area, there was a large, open-pit iron ore mine that was the town's main employer during my growing-up years. When they had tapped out the economically-recoverable iron - there was still plenty of iron but they would have had to go underground to get it - the mining company shut off the pumps that kept the pit from flooding and walked away. They even ripped up their rail line that once delivered tons of crude ore to Lake Ontario for shipping across the lake to a Pennsylvania processing facility. They left behind a massive hole in the ground over 600 feet deep and a mile across.
For the past forty years that "hole" has been filling up with clear, blue water, draining every aquifer in the area. Whether they are replenishable I don't know since no appropriate survey of local aquifers has ever been conducted, though they are currently being studied as part of a broader, provincial groundwater survey. There isn't a well within miles, nonetheless, that still has water in it. The community, fortunately, takes its municipal water from the river that runs through town but the water mains end at the town limits. The farmers and other rural residents in the area over aquifers that are draining into the mine, being all those south and east of the town, have been left without a water supply. Perhaps, in another hundred years or so, when the water level in the "mine" comes up to the level of what was the local water table, those wells may produce water again, if they are replenishable and the flow characteristics of the aquifers haven't been irreversibly damaged. The periodic tremors in the area since the mine closure are a sign, unfortunately, that some such damage may be occurring as the aquifers drain, or may have occurred as a result of the tremendous blasts while the mine was in operation.
A full two thirds of the world's people already rely almost exclusively on underground aquifers for their drinking water and over half of global agricultural irrigation uses groundwater. But a third of the world's population lives in areas that are already seriously water-stressed. Where the UN established minimum daily requirement is 10 gallons of water per person these areas have an availability of only 1-3 gallons per day and much of the daily challenge and activity revolves around how to acquire water. Water for sanitation and basic hygiene is one of the greatest challenges in these areas and thousands die every day from infections and water-borne diseases. "One child dies every eight seconds from a waterborne disease; 15 million children a year."[4]
Overall as many as half the world's aquifers are already over-exploited, being drawn upon at a rate greater than they can be or are replenished. Too often a slowly-replenishing aquifer that has served the needs of local farmers and residents for centuries comes under pressure from high volume extraction for commercial use. This, for example, was the case for one aquifer in India where a well-known soft drink company built a plant in the area and drew on the aquifer for the water to make their soft drinks. Hundreds of wells in the area went dry, wells that had been in continuous use for hundreds of years, because the replenishment rate on the aquifer could not keep up with the traditional demand plus the high volume extraction by the software company. Repeated law suits consistently came down on the side of the soft drink company. The rapidly growing global demand for clean bottled water is also putting major pressure on many aquifers, most of them deep, pristine non-replenishable fossil aquifers.
Water in an aquifer, like oil in a reservoir, generally does not exist as a unified body like a vast underground lake. But it can. More commonly, it may saturate a layer of sand underground, like the Alberta tar sands, or it may trickle slowly through cracks and cavities in a rock formation. Look at the face of any rock cliff and you will generally see the telltale vertical dark streaks where water is oozing out of these cracks in the stone. Aquifers may be vast in terms of their overall size, like the Ogallala aquifer - a non-replenishable, fossil aquifer - which covers most of the U.S. midwest. Or they may cover only a few thousand square meters or less. And they may be just a few feet below the surface or a mile or more down.
Our romantic image of a water well is the picturesque round bricked well with the peaked roof and a pull-up rope wound round a hand-cranked pulley. The vast majority of wells, however, and most of those developed over the past half-century, are drilled wells with a pump, sometimes a hand pump, sometimes a windmill, but most often a mechanical pump run by electricity or a gasoline engine. It is these powerful electrical and gasoline-driven pumps that have allowed us to exploit ever deeper aquifers, some over a mile deep, in ever greater volumes (while global population has tripled in the past century global water usage has grown more than six-fold, most of that growth from underground aquifers).
Under China's arid north plain, where much of the country's vast quantities of wheat and other grains are grown, there is a shallow aquifer that has been relied upon for centuries to supply water to mostly hand-dug wells. The replenishment rate is slow but for many centuries the amount of water being used from it was below that recharge rate. Now that aquifer has been seriously over-exploited and has been, effectively, sucked dry. But there is also a deeper aquifer under the north plain that is now being tapped thanks to powerful new mechanical pumps. The problem is this deep reservoir is a non-replenishable aquifer, the fossil water in it having been sequestered there for thousands of years. With more and more wells sunk down to this deep aquifer it too may be sucked dry within a few decades leaving China's breadbasket that feeds much of her 1.6-billion people without a source of much-needed irrigation. China's grain production, in fact, has already fallen while half a billion people have been added to the population from its "peak of 392 million tons in 1998 to an estimated 358 million tons in 2005. For perspective, this drop of 34 million tons exceeds the annual Canadian wheat harvest."[2]
An aquifer, like an oil reservoir, covers a large enough area that multiple wells can draw from it at the same time. In India, for example, the relatively few aquifers in the country are being tapped into by more than 22-million wells. And like oil, each additional well drilled into an aquifer increases the depletion rate and has the potential and often does decrease the water available to the other wells. This becomes seriously apparent when the extraction rate of all the wells exceeds the replenishment rate of the aquifer. This vast mining of aquifers in India, for example, is taking its toll and is "lowering water tables in most of the country. In North Gujarat, the water table is falling by 6 meters (20 feet) per year."[2]
There are literally thousands of legal agreements worldwide covering the right of use of surface water in lakes and rivers. But as much as 97% of the world's liquid freshwater is not in these lakes and rivers but rather in underground aquifers. There are essentially no existing agreements covering the use of groundwater, even though many aquifers cross national borders and their over-exploitation on one side of the border is a strong potential source of conflict and even war. Those few agreements that even mention groundwater cover it as an aside and something to be dealt with in the future. But that future is now, if there is to be a future for the world's aquifers and drinkable water for future human generations.
We are taking our underground water sources for granted and treating them with the same reckless abandon that we treat our lakes, rivers and the oceans. "Toxic chemicals are contaminating groundwater on every inhabited continent, endangering the world's most valuable supplies of freshwater, reports a new study from the Worldwatch Institute, a Washington, DC-based research organization."[3] Just a few U.S. examples, which are similar to examples from other continents, will illustrate the depth and breadth of the problem.
* "Water utilities in the midwestern United States, a region that is highly dependent on groundwater, spend $400 million each year to treat water for just one chemical, the pesticide atrazine. According to the U.S. National Research Council, initial cleanup of contaminated groundwater at some 300,000 sites in the United States could cost up to $1 trillion over the next 30 years."[3]
* "The U.S. Environmental Protection Agency (EPA) estimates that about 100,000 gasoline storage tanks are leaking chemicals into groundwater. In Santa Monica, California, wells supplying half the city's water have been closed because of dangerously high levels of the gasoline additive MTBE."[3]
* "Sixty percent of the most hazardous liquid waste in the United States - 34 billion liters per year of solvents, heavy metals, and radioactive materials - is injected directly into deep groundwater via thousands of "injection wells." Although the EPA requires that these effluents be injected below the deepest source of drinking water, some have entered underground water supplies in Florida, Texas, Ohio, and Oklahoma."[3]
Man is the only species on this planet able to and in the practice of exploiting earth's sequestered resources like oil, natural gas, coal, minerals, and water. Apart from the fact we claim an exclusivity that excludes other species with whom we reluctantly share this planet we also, particularly in this past century, seem to have no sense of responsibility for sharing them with future generations of humans, our own children and grandchildren. The resources they will need for their very survival are being voraciously gobbled up and discarded as an assumed birthright in our greedy demands for support of our increasingly decadent lifestyle. If this robbing from future generations were accidental because we did not understand the long-term implications of over-exploitation it would be bad enough. But it is not accidental. We do understand. Our governments and industry organizations pump out reams of statistics every day detailing our crime. And yet we continue on, as if to say to our grandchildren, "To hell with you. I'm going to have a good time as long as I can and it's your problem to figure out how to survive on what's left when our party is over."
==============
Additional reading material:
1) A Global Water Crisis
2) Aquifer Depletion
3) The Hidden Freshwater Crisis
4) UN Highlights World Water Crisis
5) The Hidden Freshwater Crisis
The term "mining water" is increasingly used to refer to the extraction of groundwater, usually by pumps, from underground aquifers. Get used to the term. At the rate we are polluting our surface water in lakes and rivers and the rate at which freshwater sources are drying up under the assault of global warming and human development it may soon be the only potential source of clean drinking water we or our children and grandchildren have left. It is an appropriate term in many ways.
Water is a finite resource that is constantly recycled - like the metal in beer cans - and many of the underground aquifers from which we extract it are non-replenishable, meaning once it is gone, like a vein of ore, it's time to shut off the pumps and go home or move on to another aqua-motherlode. Even those aquifers that are replenishable, however, have a long-established, generally-low rate at which they will replenish ("Water that enters an aquifer remains there for an average of 1,400 years, compared to only 16 days for rivers."[5]. Extract more water than the rate at which it will refill and you start the process of depleting, and possibly irreversibly damaging, the reservoir. The land over many aquifers that have been over-exploited shows clear signs of sinking and compression due to the underground void left as the water is extracted.
Changing weather patterns generally, and the more pronounced changes being brought on by global warming, and the persistent human habit of draining marshes and wetlands for development, many of which are the source of replenishment for underground aquifers, are also changing the rate at which many aquifers replenish, usually negatively. Unless aquifer replenishment rates are tracked with changes in the climate and local development ("The Yellow river in China, Colorado River in North America, and the Murray River in Australia are amongst the Earth's major rivers that are regularly sucked dry.")[1], those dependent on an aquifer for water may find their wells suddenly going dry even though they have not increased their water extraction.
There is another aspect to the term "mining water" that is particularly worrisome for the future. Water rights to surface water in most areas today require a water rights license, even if the water runs through or touches your property. That license spells out what source of water you have access to and how much water from that source you are permitted to use. If the term and concept of "mining water" works its way into government bureaucratic lexicon you may also need a license to access the groundwater beneath your own property - some jurisdictions already require it - a license that similarly specifies how much of that water you have a right to use. In international trade agreements, and in the conditions attached to IMF and Worldbank loans to developing countries, water services and water rights are a commodity that is increasingly required to be open for commercial trade. It is possible, as clean surface water sources become increasingly scarce, that your groundwater may become an important tradeable commodity for which you are going to have to compete against the highest commercial bidder. With the majority of aquifers already under pressure from over exploitation governments everywhere may decide that growing demand for commercial groundwater access is exactly why there is a need of government control and private access restriction.
For me, in addition, the term also has a strong personal meaning which, I believe, clearly illustrates a broader issue. The southeastern Ontario community I grew up in was a mining town. A mile southeast of home, the constantly-growing, flat-top mountain of slag clearly visible from anywhere in town and the surrounding area, there was a large, open-pit iron ore mine that was the town's main employer during my growing-up years. When they had tapped out the economically-recoverable iron - there was still plenty of iron but they would have had to go underground to get it - the mining company shut off the pumps that kept the pit from flooding and walked away. They even ripped up their rail line that once delivered tons of crude ore to Lake Ontario for shipping across the lake to a Pennsylvania processing facility. They left behind a massive hole in the ground over 600 feet deep and a mile across.
For the past forty years that "hole" has been filling up with clear, blue water, draining every aquifer in the area. Whether they are replenishable I don't know since no appropriate survey of local aquifers has ever been conducted, though they are currently being studied as part of a broader, provincial groundwater survey. There isn't a well within miles, nonetheless, that still has water in it. The community, fortunately, takes its municipal water from the river that runs through town but the water mains end at the town limits. The farmers and other rural residents in the area over aquifers that are draining into the mine, being all those south and east of the town, have been left without a water supply. Perhaps, in another hundred years or so, when the water level in the "mine" comes up to the level of what was the local water table, those wells may produce water again, if they are replenishable and the flow characteristics of the aquifers haven't been irreversibly damaged. The periodic tremors in the area since the mine closure are a sign, unfortunately, that some such damage may be occurring as the aquifers drain, or may have occurred as a result of the tremendous blasts while the mine was in operation.
A full two thirds of the world's people already rely almost exclusively on underground aquifers for their drinking water and over half of global agricultural irrigation uses groundwater. But a third of the world's population lives in areas that are already seriously water-stressed. Where the UN established minimum daily requirement is 10 gallons of water per person these areas have an availability of only 1-3 gallons per day and much of the daily challenge and activity revolves around how to acquire water. Water for sanitation and basic hygiene is one of the greatest challenges in these areas and thousands die every day from infections and water-borne diseases. "One child dies every eight seconds from a waterborne disease; 15 million children a year."[4]
Overall as many as half the world's aquifers are already over-exploited, being drawn upon at a rate greater than they can be or are replenished. Too often a slowly-replenishing aquifer that has served the needs of local farmers and residents for centuries comes under pressure from high volume extraction for commercial use. This, for example, was the case for one aquifer in India where a well-known soft drink company built a plant in the area and drew on the aquifer for the water to make their soft drinks. Hundreds of wells in the area went dry, wells that had been in continuous use for hundreds of years, because the replenishment rate on the aquifer could not keep up with the traditional demand plus the high volume extraction by the software company. Repeated law suits consistently came down on the side of the soft drink company. The rapidly growing global demand for clean bottled water is also putting major pressure on many aquifers, most of them deep, pristine non-replenishable fossil aquifers.
Water in an aquifer, like oil in a reservoir, generally does not exist as a unified body like a vast underground lake. But it can. More commonly, it may saturate a layer of sand underground, like the Alberta tar sands, or it may trickle slowly through cracks and cavities in a rock formation. Look at the face of any rock cliff and you will generally see the telltale vertical dark streaks where water is oozing out of these cracks in the stone. Aquifers may be vast in terms of their overall size, like the Ogallala aquifer - a non-replenishable, fossil aquifer - which covers most of the U.S. midwest. Or they may cover only a few thousand square meters or less. And they may be just a few feet below the surface or a mile or more down.
Our romantic image of a water well is the picturesque round bricked well with the peaked roof and a pull-up rope wound round a hand-cranked pulley. The vast majority of wells, however, and most of those developed over the past half-century, are drilled wells with a pump, sometimes a hand pump, sometimes a windmill, but most often a mechanical pump run by electricity or a gasoline engine. It is these powerful electrical and gasoline-driven pumps that have allowed us to exploit ever deeper aquifers, some over a mile deep, in ever greater volumes (while global population has tripled in the past century global water usage has grown more than six-fold, most of that growth from underground aquifers).
Under China's arid north plain, where much of the country's vast quantities of wheat and other grains are grown, there is a shallow aquifer that has been relied upon for centuries to supply water to mostly hand-dug wells. The replenishment rate is slow but for many centuries the amount of water being used from it was below that recharge rate. Now that aquifer has been seriously over-exploited and has been, effectively, sucked dry. But there is also a deeper aquifer under the north plain that is now being tapped thanks to powerful new mechanical pumps. The problem is this deep reservoir is a non-replenishable aquifer, the fossil water in it having been sequestered there for thousands of years. With more and more wells sunk down to this deep aquifer it too may be sucked dry within a few decades leaving China's breadbasket that feeds much of her 1.6-billion people without a source of much-needed irrigation. China's grain production, in fact, has already fallen while half a billion people have been added to the population from its "peak of 392 million tons in 1998 to an estimated 358 million tons in 2005. For perspective, this drop of 34 million tons exceeds the annual Canadian wheat harvest."[2]
An aquifer, like an oil reservoir, covers a large enough area that multiple wells can draw from it at the same time. In India, for example, the relatively few aquifers in the country are being tapped into by more than 22-million wells. And like oil, each additional well drilled into an aquifer increases the depletion rate and has the potential and often does decrease the water available to the other wells. This becomes seriously apparent when the extraction rate of all the wells exceeds the replenishment rate of the aquifer. This vast mining of aquifers in India, for example, is taking its toll and is "lowering water tables in most of the country. In North Gujarat, the water table is falling by 6 meters (20 feet) per year."[2]
There are literally thousands of legal agreements worldwide covering the right of use of surface water in lakes and rivers. But as much as 97% of the world's liquid freshwater is not in these lakes and rivers but rather in underground aquifers. There are essentially no existing agreements covering the use of groundwater, even though many aquifers cross national borders and their over-exploitation on one side of the border is a strong potential source of conflict and even war. Those few agreements that even mention groundwater cover it as an aside and something to be dealt with in the future. But that future is now, if there is to be a future for the world's aquifers and drinkable water for future human generations.
We are taking our underground water sources for granted and treating them with the same reckless abandon that we treat our lakes, rivers and the oceans. "Toxic chemicals are contaminating groundwater on every inhabited continent, endangering the world's most valuable supplies of freshwater, reports a new study from the Worldwatch Institute, a Washington, DC-based research organization."[3] Just a few U.S. examples, which are similar to examples from other continents, will illustrate the depth and breadth of the problem.
* "Water utilities in the midwestern United States, a region that is highly dependent on groundwater, spend $400 million each year to treat water for just one chemical, the pesticide atrazine. According to the U.S. National Research Council, initial cleanup of contaminated groundwater at some 300,000 sites in the United States could cost up to $1 trillion over the next 30 years."[3]
* "The U.S. Environmental Protection Agency (EPA) estimates that about 100,000 gasoline storage tanks are leaking chemicals into groundwater. In Santa Monica, California, wells supplying half the city's water have been closed because of dangerously high levels of the gasoline additive MTBE."[3]
* "Sixty percent of the most hazardous liquid waste in the United States - 34 billion liters per year of solvents, heavy metals, and radioactive materials - is injected directly into deep groundwater via thousands of "injection wells." Although the EPA requires that these effluents be injected below the deepest source of drinking water, some have entered underground water supplies in Florida, Texas, Ohio, and Oklahoma."[3]
Man is the only species on this planet able to and in the practice of exploiting earth's sequestered resources like oil, natural gas, coal, minerals, and water. Apart from the fact we claim an exclusivity that excludes other species with whom we reluctantly share this planet we also, particularly in this past century, seem to have no sense of responsibility for sharing them with future generations of humans, our own children and grandchildren. The resources they will need for their very survival are being voraciously gobbled up and discarded as an assumed birthright in our greedy demands for support of our increasingly decadent lifestyle. If this robbing from future generations were accidental because we did not understand the long-term implications of over-exploitation it would be bad enough. But it is not accidental. We do understand. Our governments and industry organizations pump out reams of statistics every day detailing our crime. And yet we continue on, as if to say to our grandchildren, "To hell with you. I'm going to have a good time as long as I can and it's your problem to figure out how to survive on what's left when our party is over."
==============
Additional reading material:
1) A Global Water Crisis
2) Aquifer Depletion
3) The Hidden Freshwater Crisis
4) UN Highlights World Water Crisis
5) The Hidden Freshwater Crisis
Wednesday, March 19, 2008
Peak Water
(See previous article "The Emerging Global Freshwater Crisis"[10] in the blog.)
The real impact of the peaking of any finite resource is that long-established demand continues to rise while the supply goes into terminal decline. This is the nexus of a crisis. In our growth-addicted global society to it means that growth of whatever sectors of the economy and society rely on that resource must cease. There is much discussion and debate about peak oil and the broad impact it will have on our energy-hungry global society. But we are facing another peak which will ultimately have even more devastating consequences.
Peak water!
There is a not unreasonable tendency to think of water as a renewable resource. Seventy-five percent of the earth's surface, after all, is covered with it. And the planet has a very efficient hydro-cycle where water is constantly recycled and recirculated. The rain that falls on a field of Kansas corn rose as water vapour from the vast warm waters of the Gulf of Mexico or the Atlantic Ocean. But salt water is largely unusable and the surface freshwater contained in lakes and rivers is only a minuscule 0.3 percent of the water on the planet and about ten percent of the total freshwater which is only 2.5% of the planet's total water supply. Ninety percent of the world's freshwater is locked up in ice caps and glaciers or sequestered in deep underground aquifers. In fact, according to the Worldwatch Institute "Some 97 percent of the planet's liquid freshwater is stored in underground aquifers."[9]
Over half the freshwater usage in the world (estimates are as high as 75% and growing) comes from these underground aquifers, water that is replenished, if at all, over slow geological time frames, not seasonal replenishment like surface water. "Water that enters an aquifer remains there for an average of 1,400 years, compared to only 16 days for rivers."[9] Many of the world's major aquifers that are heavily relied upon for agriculture, like the Ogallala Aquifer in the western U.S. (about 400-million cubic meters of drawdown per year)[1], the Arabian Aquifer and the deep aquifer under the North China Plain (the shallow aquifer is replenishable but has largely been sucked dry)[7], are non-replenishable, fossil aquifers mostly formed during and after various ice ages. Once such an aquifer is depleted it is gone, forever. With replenishable aquifers there is generally at least the potential for aquifer recovery if the aquifer has not been contaminated and the rate of drawdown is reduced to below the replenishment rate. Coastal aquifers, however, can become increasingly contaminated, not surprisingly, from salt-water intrusion if the drawdown exceeds the natural replenishment rate. Once that happens, as is the case in much of the middle east and central Asia, the aquifer, though it may be full of water, is no longer usable.
But there is increasing concern that vital aquifers everywhere are becoming contaminated with toxins. A new study from the Worldwatch Institute reveals that "this first global survey of groundwater pollution shows that a toxic brew of pesticides, nitrogen fertilizers, industrial chemicals, and heavy metals is fouling groundwater everywhere, and that the damage is often worst in the very places where people most need water."[9] "Sixty percent of the most hazardous liquid waste in the United States-34 billion liters per year of solvents, heavy metals, and radioactive materials-is injected directly into deep groundwater via thousands of "injection wells." Although the EPA requires that these effluents be injected below the deepest source of drinking water, some have entered underground water supplies in Florida, Texas, Ohio, and Oklahoma."[9] And the U.S. EPA estimates "that about 100,000 gasoline storage tanks are leaking chemicals into groundwater. In Santa Monica, California, wells supplying half the city's water have been closed because of dangerously high levels of the gasoline additive MTBE."[9] A close personal friend in Australia with a permaculture farm found the groundwater below their property contaminated from just such a source, a petrol station just up the road with leaky storage tanks.
Over the last century while the world population has tripled global freshwater usage has increased more than six-fold with the bulk of that increase being ground water from deep aquifers. And it is estimated that as much as 90% of the global population increase to the middle of this century will be in areas that are already facing critical freshwater supply constraints[5] either as a result of surface water contamination ("Some two million tons of waste per day are disposed of within receiving waters, including industrial wastes and chemicals, human waste and agricultural waste" according to the UN)[1] or aquifer depletion[9].
Where the minimum daily water availability per person established by the United Nations is ten gallons, these water-challenged areas have daily water availability now of less than three gallons per person, many of them 1.5 gallons or less. "Unless population growth can be slowed quickly by investing heavily in female literacy and family planning services, there may not be a humane solution to the emerging world water shortage." states the report Water Shortages May Cause Food Shortages.[5] Nearly 1.7 billion people do not have access to sufficient water for basic personal hygiene. "Infectious waterborne diseases such as diarrhea, typhoid, and cholera are responsible for 80 percent of illnesses and deaths in the developing world, many of them children. One child dies every eight seconds from a waterborne disease; 15 million children a year."[1]
On average agriculture is responsible for over seventy percent of the freshwater a nation consumes. It is reliably estimated that with current agricultural irrigation practices every ton of wheat or corn produced, for example, consumes 1000 tons of freshwater. About sixty percent of that usage, however, is wasted through losses from leaky irrigation ditches, run off and field evaporation.[1]
When nations begin to run into serious water constraints they have to make up lost agricultural production with imports, particularly of grains. "This can be seen with Iran and Egypt, both of which now import more wheat than Japan, traditionally the world's leading importer. Imports supply 40 percent or more of the total consumption of grain--wheat, rice, and feedgrains--in both countries. Numerous other water-short countries also import much of their grain. Morocco brings in half of its grain. For Algeria and Saudi Arabia, the figure is over 70 percent. Yemen imports nearly 80 percent of its grain, and Israel, more than 90 percent."[5] As the report Water Shortages May Cause Food Shortages says, "Since a ton of grain equals 1,000 tons of water, importing grain is the most efficient way to import water. World grain futures will soon in effect become world water futures."[5]
But grain imports are already becoming increasingly problematic. The numbers involved are massive. According to the report, Aquifer Depletion, "Overall, China’s grain production has fallen from its historical peak of 392 million tons in 1998 to an estimated 358 million tons in 2005. For perspective, this drop of 34 million tons exceeds the annual Canadian wheat harvest."[7] With the combined impact of global warming, surface water pollution, aquifer depletion and continuing population increases the ability to make up agricultural shortfalls in the world market is diminishing. The global emergency food grain reserves, on which the poorest of the world's poor are dependant, have over these past several years fallen from a marginal 119-day supply to a critical 53-day supply and those reserves are still declining. In fact, with the increased demand for seed grains driven by the rush for biofuels that decline is accelerating.
Agriculture, of course, is not the only use we make of fresh water. Industry consumes 20% and residential consumption accounts for ten percent. In the arid nations currently experiencing or facing near-term critical freshwater shortages, however, agriculture is responsible for ninety percent of all freshwater usage. With the combination of demand for agriculture and that of domestic and industrial use in growing cities, the aquifers - many of them non-replenishable - underlying the larger cities in many developing countries - on which those cities are totally dependant - are depleting at rates of 3-8 meters per year and may be totally exhausted within the next 20-25 years.[5] "Nearly one third of all humanity relies almost exclusively on groundwater for drinking, including the residents of some of the largest cities in the developing world, such as Jakarta, Dhaka, Lima, and Mexico City."[9]
As surface water in lakes and rivers becomes increasingly polluted and as surface water sources dry up under the impact of global warming future generations may have to increasingly rely on groundwater sources for their very survival. It is our responsibility to protect it for both those future generations and ourselves. "Groundwater contamination is an irreversible act that will deprive future generations of one of life's basic resources," said Payal Sampat, author of Deep Trouble: The Hidden Threat of Groundwater Pollution. "In the next 50 years, an additional 3 billion people are expected to inhabit the Earth, creating even more demand for water for drinking, irrigation, and industry. But we're polluting our cheapest and most easily accessible supply of water. Most groundwater is still pristine, but unless we take immediate action, clean groundwater will not be there when we need it."[9]
The following were important sources of material and research for this article.
1) UN Highlights World Water Crisis
2) A Global Water Crisis
3) Water Crisis - World Water Council
4) Water Deficits Growing In Many Countries
5) Water Shortages May Cause Food Shortages
6) The Ogallala Aquifer Depletion
7) Aquifer depletion
8) Report: Water crisis hits rich countries
9) The Hidden Freshwater Crisis
10) The Emerging Global Freshwater Crisis
The real impact of the peaking of any finite resource is that long-established demand continues to rise while the supply goes into terminal decline. This is the nexus of a crisis. In our growth-addicted global society to it means that growth of whatever sectors of the economy and society rely on that resource must cease. There is much discussion and debate about peak oil and the broad impact it will have on our energy-hungry global society. But we are facing another peak which will ultimately have even more devastating consequences.
Peak water!
There is a not unreasonable tendency to think of water as a renewable resource. Seventy-five percent of the earth's surface, after all, is covered with it. And the planet has a very efficient hydro-cycle where water is constantly recycled and recirculated. The rain that falls on a field of Kansas corn rose as water vapour from the vast warm waters of the Gulf of Mexico or the Atlantic Ocean. But salt water is largely unusable and the surface freshwater contained in lakes and rivers is only a minuscule 0.3 percent of the water on the planet and about ten percent of the total freshwater which is only 2.5% of the planet's total water supply. Ninety percent of the world's freshwater is locked up in ice caps and glaciers or sequestered in deep underground aquifers. In fact, according to the Worldwatch Institute "Some 97 percent of the planet's liquid freshwater is stored in underground aquifers."[9]
Over half the freshwater usage in the world (estimates are as high as 75% and growing) comes from these underground aquifers, water that is replenished, if at all, over slow geological time frames, not seasonal replenishment like surface water. "Water that enters an aquifer remains there for an average of 1,400 years, compared to only 16 days for rivers."[9] Many of the world's major aquifers that are heavily relied upon for agriculture, like the Ogallala Aquifer in the western U.S. (about 400-million cubic meters of drawdown per year)[1], the Arabian Aquifer and the deep aquifer under the North China Plain (the shallow aquifer is replenishable but has largely been sucked dry)[7], are non-replenishable, fossil aquifers mostly formed during and after various ice ages. Once such an aquifer is depleted it is gone, forever. With replenishable aquifers there is generally at least the potential for aquifer recovery if the aquifer has not been contaminated and the rate of drawdown is reduced to below the replenishment rate. Coastal aquifers, however, can become increasingly contaminated, not surprisingly, from salt-water intrusion if the drawdown exceeds the natural replenishment rate. Once that happens, as is the case in much of the middle east and central Asia, the aquifer, though it may be full of water, is no longer usable.
But there is increasing concern that vital aquifers everywhere are becoming contaminated with toxins. A new study from the Worldwatch Institute reveals that "this first global survey of groundwater pollution shows that a toxic brew of pesticides, nitrogen fertilizers, industrial chemicals, and heavy metals is fouling groundwater everywhere, and that the damage is often worst in the very places where people most need water."[9] "Sixty percent of the most hazardous liquid waste in the United States-34 billion liters per year of solvents, heavy metals, and radioactive materials-is injected directly into deep groundwater via thousands of "injection wells." Although the EPA requires that these effluents be injected below the deepest source of drinking water, some have entered underground water supplies in Florida, Texas, Ohio, and Oklahoma."[9] And the U.S. EPA estimates "that about 100,000 gasoline storage tanks are leaking chemicals into groundwater. In Santa Monica, California, wells supplying half the city's water have been closed because of dangerously high levels of the gasoline additive MTBE."[9] A close personal friend in Australia with a permaculture farm found the groundwater below their property contaminated from just such a source, a petrol station just up the road with leaky storage tanks.
Over the last century while the world population has tripled global freshwater usage has increased more than six-fold with the bulk of that increase being ground water from deep aquifers. And it is estimated that as much as 90% of the global population increase to the middle of this century will be in areas that are already facing critical freshwater supply constraints[5] either as a result of surface water contamination ("Some two million tons of waste per day are disposed of within receiving waters, including industrial wastes and chemicals, human waste and agricultural waste" according to the UN)[1] or aquifer depletion[9].
Where the minimum daily water availability per person established by the United Nations is ten gallons, these water-challenged areas have daily water availability now of less than three gallons per person, many of them 1.5 gallons or less. "Unless population growth can be slowed quickly by investing heavily in female literacy and family planning services, there may not be a humane solution to the emerging world water shortage." states the report Water Shortages May Cause Food Shortages.[5] Nearly 1.7 billion people do not have access to sufficient water for basic personal hygiene. "Infectious waterborne diseases such as diarrhea, typhoid, and cholera are responsible for 80 percent of illnesses and deaths in the developing world, many of them children. One child dies every eight seconds from a waterborne disease; 15 million children a year."[1]
On average agriculture is responsible for over seventy percent of the freshwater a nation consumes. It is reliably estimated that with current agricultural irrigation practices every ton of wheat or corn produced, for example, consumes 1000 tons of freshwater. About sixty percent of that usage, however, is wasted through losses from leaky irrigation ditches, run off and field evaporation.[1]
When nations begin to run into serious water constraints they have to make up lost agricultural production with imports, particularly of grains. "This can be seen with Iran and Egypt, both of which now import more wheat than Japan, traditionally the world's leading importer. Imports supply 40 percent or more of the total consumption of grain--wheat, rice, and feedgrains--in both countries. Numerous other water-short countries also import much of their grain. Morocco brings in half of its grain. For Algeria and Saudi Arabia, the figure is over 70 percent. Yemen imports nearly 80 percent of its grain, and Israel, more than 90 percent."[5] As the report Water Shortages May Cause Food Shortages says, "Since a ton of grain equals 1,000 tons of water, importing grain is the most efficient way to import water. World grain futures will soon in effect become world water futures."[5]
But grain imports are already becoming increasingly problematic. The numbers involved are massive. According to the report, Aquifer Depletion, "Overall, China’s grain production has fallen from its historical peak of 392 million tons in 1998 to an estimated 358 million tons in 2005. For perspective, this drop of 34 million tons exceeds the annual Canadian wheat harvest."[7] With the combined impact of global warming, surface water pollution, aquifer depletion and continuing population increases the ability to make up agricultural shortfalls in the world market is diminishing. The global emergency food grain reserves, on which the poorest of the world's poor are dependant, have over these past several years fallen from a marginal 119-day supply to a critical 53-day supply and those reserves are still declining. In fact, with the increased demand for seed grains driven by the rush for biofuels that decline is accelerating.
Agriculture, of course, is not the only use we make of fresh water. Industry consumes 20% and residential consumption accounts for ten percent. In the arid nations currently experiencing or facing near-term critical freshwater shortages, however, agriculture is responsible for ninety percent of all freshwater usage. With the combination of demand for agriculture and that of domestic and industrial use in growing cities, the aquifers - many of them non-replenishable - underlying the larger cities in many developing countries - on which those cities are totally dependant - are depleting at rates of 3-8 meters per year and may be totally exhausted within the next 20-25 years.[5] "Nearly one third of all humanity relies almost exclusively on groundwater for drinking, including the residents of some of the largest cities in the developing world, such as Jakarta, Dhaka, Lima, and Mexico City."[9]
As surface water in lakes and rivers becomes increasingly polluted and as surface water sources dry up under the impact of global warming future generations may have to increasingly rely on groundwater sources for their very survival. It is our responsibility to protect it for both those future generations and ourselves. "Groundwater contamination is an irreversible act that will deprive future generations of one of life's basic resources," said Payal Sampat, author of Deep Trouble: The Hidden Threat of Groundwater Pollution. "In the next 50 years, an additional 3 billion people are expected to inhabit the Earth, creating even more demand for water for drinking, irrigation, and industry. But we're polluting our cheapest and most easily accessible supply of water. Most groundwater is still pristine, but unless we take immediate action, clean groundwater will not be there when we need it."[9]
The following were important sources of material and research for this article.
1) UN Highlights World Water Crisis
2) A Global Water Crisis
3) Water Crisis - World Water Council
4) Water Deficits Growing In Many Countries
5) Water Shortages May Cause Food Shortages
6) The Ogallala Aquifer Depletion
7) Aquifer depletion
8) Report: Water crisis hits rich countries
9) The Hidden Freshwater Crisis
10) The Emerging Global Freshwater Crisis
Subscribe to:
Posts (Atom)
