There is a lot of water on planet Earth – 326,000,000,000,000,000,000 gallons (329 trillion gallons), or 1,260,000,000,000,000,000,000 litres. About 70 percent of the planet is made of oceans and 98 percent of all the water on earth is in the oceans. That’s a lot of water.
Only 2 percent of all this water is fresh drinking water but most of that is locked up in the polar icecaps and glaciers – approximately 80 percent (or 1.6 percent of the planet’s water). Another 36 percent is in underground aquifers and wells and roughly 0.036 percent of our fresh water supply is found in lakes and rivers. That still leaves thousands of trillions of gallons for drinking. (Source: Environmental Science, howstuffworks)
But is that enough fresh drinking water for a population which is growing exponentially? Every second, four babies are born and two people die. In the time it will take to write this article, 20,000 people will have joined the human race.
‘Peak Oil’ has been extensively written about for many years “but the real threat to our future is peak water,” wrote Lester R. Brown, president of the Earth Policy Institute, in the summer of 2013 in theguardian. “There are substitutes for oil, but not for water. We can produce food without oil, but not without water.”
“The concept of “peak water” and its implications for the U.S. economy are less well explored and understood.” says Dr. Peter Gleick, President of the Pacific Institute. His April 2010 paper (Peak water limits to freshwater withdrawal and use) sparked such interest that the term “peak water” was chosen by The New York Times as one of their 33 “Words of the Year” for 2010. Gleick outlines three different definitions of “peak water”:
Peak Renewable Water. Most water resources are renewable, in the form of flows of rainfall, rivers, streams, and groundwater basins that are recharged over relatively short time frames. Renewable, however, does not mean unlimited. When human demands for water from a watershed reach 100% of renewable supply, we can’t take any more, and we reach “peak renewable” limits.
For a number of major river basins, we have reached the point of peak renewable water limits, including the Colorado River in the United States. All of the water of the Colorado (indeed, more than 100% of the average flow) is already spoken for through legal agreements with the seven US states and Mexico and in a typical year river flows now often fall to zero before they reach their ends. This is true for a growing number of rivers around the world.
Peak Nonrenewable Water. In some places, water comes from stocks of water that are effectively nonrenewable, such as groundwater aquifers with very slow recharge rates or groundwater systems damaged by compaction or other physical changes in the basin. When the use of water from a groundwater aquifer far exceeds natural recharge rates, this stock of groundwater will be depleted or fall to a level where the cost of extraction exceeds the value of the water when used, very much like oil fields. Continued production of water beyond natural recharge rates will become increasingly difficult and expensive as groundwater levels drop, leading to a peak of production, followed by diminishing withdrawals and use.
This kind of unsustainable groundwater use is already occurring in the Ogallala Aquifer in the Great Plains of the United States, the North China plains, parts of California’s Central Valley, and numerous regions in India. In these basins, extraction may not fall to zero, but current rates of pumping cannot be maintained. Worldwide, a significant fraction of current agricultural production depends on non-renewable groundwater. This is extremely dangerous for the reliability of long-term food supplies.
Peak Ecological Water. Water supports commercial and industrial activity and human health, but it is also fundamental for animals, plants, habitats, and environmentally dependent livelihoods. By some estimates, humans already appropriate almost 50% of all renewable and accessible freshwater flows, leading to significant ecological disruptions…the term “peak ecological water” refers to the point where taking more water for human use leads to ecological disruptions greater than the value that this increased water provides to humans.
Running Out of Water
The story of “Peak Water” is increasingly coming to the forefront in 2014 as large portions of the American mid-west are suffering through the worst drought in the last hundred years. Drinking water supplies from the tap have dried up in many communities forcing authorities to provide bottled-water rations and water for bathing and home use.
Tom Philpott writes in Mother Jones that the water crisis is much worse than previously known. Homeowners and farmers are having to drill deeper wells to harvest dwindling groundwater reserves. California has declared a drought emergency and imposed mandatory restrictions on water use with the levy of heavy fines for wasting water on non-essential activities – watering lawns and driveway, washing cars. National Geographic reports that:
Groundwater supplies in our major western aquifers — the Central Valley, the southern Ogallala and now those that underlie the Colorado River Basin – are disappearing. We simply pump out more water than is being naturally replenished, and as a result, groundwater levels are falling rapidly…..The American West is running out of water.
Of course water scarcity and peak water are not new concepts to the rest of the world. According to the UN Environment Program, more than half of the world’s population will struggle with water shortages by 2030.
Around 1.2 billion people, or almost one-fifth of the world’s population, live in areas of physical scarcity, and 500 million people are approaching this situation. Another 1.6 billion people, or almost one quarter of the world’s population, face economic water shortage (where countries lack the necessary infrastructure to take water from rivers and aquifers).
Water Use by Sector
According to the Food and Agriculture Organization, irrigation now claims close to 70 percent of all freshwater appropriated for human use.” The remaining water is for direct use by humans for domestic activities and by industry. Better water management strategies – conservation, better irrigation techniques, reducing water usage – will be needed to cope with a world population that has doubled since 1960. The following chart shows the global water use by sector – agricultural, domestic and industrial.
The world is now entering a water crisis. There is increasing conflict world-wide for fresh water resources.
My worry is that “Fracking” is going to gobble up water resources at an alarming rate… and what state is it going to be in once it is released after the process.
I don’t believe the scientists when they purport that the process of “Fracking” is safe and that water is safe after the process…. why don’t I believe them? Well, when they began the wonderful development of the Alberta Tar Sands, they said that there would be no harm to the environment or water courses…. and look at the sorry state of that particular abomination.
Currently, the Oil industry wants to ship out Canadian Oil through the St Lawrence Seaway – a a major disruption to the Beluga Whale (if not causing its outright demise)…. when will all this madness stop. And more importantly when will Industry stop lying to us!
We are fed all kinds of political promises, industrial lies and rubbish via “paid scientific research” by the promotors of polluting and resource depleting industries. I suppose when we’ve run out of drinking water, they’ll commission a study to see what our options will be to find an alternative… when its just too late and the Earth is truly dying!
This is water week with representatives from every corner of the globe meeting in Stockholm. On Sept 3, I will be part of a panel on GreenDivas radio to discuss issues and concerns about water. The theme at this year’s conference is the interplay of energy and water. So your comments about Fracking are bang on. Water is being used for fracking rendering it undrinkable and then people are running out of water as is the case in California right now.
I know that fracking is also a huge issue in the UK as well.
As for your question about when industry will stop lying to citizens. Good luck with that.
How did the radio show go?
I think it went well. I will be posting this interview on my website soon. You can watch for it.
Thanks for this information, Rolly.
Lauder and I head out on Tuesday to meet up the Climate Marchers in Ohio east somewhere to walk for approx. 5 days with them. Look forward to seeing Anita there and meeting some
new folks too.
Hi Pat and Lauder – I’m so happy for both of you. Please say Hi to Anita for me as well.
Thanks for supporting this initiative.