A paper about to be published (link is PDF) by the National Academy of Sciences makes a pretty compelling case that we passed peak water in the US about forty years ago. It uses a variety of accounting methods and definitions and gets pretty much the same depressing result with all of them.
The abstract:
This doesn't exactly come as a surprise. The Colorado River doesn't reach the ocean any longer. More is allocated from it than it actually carries. Much of the West depends on the Ogallala aquifer which is pretty much played out. All of this was detailed in books like Cadillac Desert twenty five years ago for anyone who was listening.
I was worried about this lo these many years ago. Maybe it's because I'm from a part of the arid West where the county water commission really is important. Allocating scarce water for home use, industry, wildlife, irrigation and energy is serious business. I grew up hearing about things like the death of Pete French.
At the time my economics professors all said "Don't worry. It's just a matter of allocation and pricing. Water will always be available when it's needed. The Market will take care of it." Entire cities blown away in Western China and whole great kingdoms in Africa, the collapse of agriculture in Meso-America, ghost towns in North America where the water gave out. None of it mattered. There would always be enough water because, well, there just had to be.
The one who took me seriously was a visiting Israeli Professor Emeritus from Hebrew University who had taught at a number of universities in Arab countries under a discreet pseudonym. He told me that I was one of the very few people he'd met who got it. In his very learned professional opinion the real irreconcilable conflict in the Middle East isn't about religion or oil or tribal politics. It's about water.
Or as they said back home
Whiskey's fer drinkin'. Water's fer killin'.
The abstract:
Freshwater resources are fundamental for maintaining human health, agricultural production, economic activity as well as critical ecosystem functions. As populations and economies grow, new constraints on water resources are appearing, raising questions about limits to water availability. Such resource questions are not new. The specter of peak oila peaking and then decline in oil productionhas long been predicted and debated. We present here a detailed assessment and definition of three concepts of peak water: peak renewable water, peak nonrenewable water, and peak ecological water. These concepts can help hydrologists, water managers, policy makers, and the public understand and manage different water systems more effectively and sustainably. Peak renewable water applies where flow constraints limit total water availability over time. Peak nonrenewable water is observable in groundwater systems where production rates substantially exceed natural recharge rates and where overpumping or contamination leads to a peak of production followed by a decline, similar to more traditional peak-oil curves. Peak ecological water is defined as the point beyond which the total costs of ecological disruptions and damages exceed the total value provided by human use of that water. Despite uncertainties in quantifying many of these costs and benefits in consistent ways, more and more watersheds appear to have already passed the point of peak water. Applying these concepts can help shift the way freshwater resources are managed toward more productive, equitable, efficient, and sustainable use.
This doesn't exactly come as a surprise. The Colorado River doesn't reach the ocean any longer. More is allocated from it than it actually carries. Much of the West depends on the Ogallala aquifer which is pretty much played out. All of this was detailed in books like Cadillac Desert twenty five years ago for anyone who was listening.
I was worried about this lo these many years ago. Maybe it's because I'm from a part of the arid West where the county water commission really is important. Allocating scarce water for home use, industry, wildlife, irrigation and energy is serious business. I grew up hearing about things like the death of Pete French.
At the time my economics professors all said "Don't worry. It's just a matter of allocation and pricing. Water will always be available when it's needed. The Market will take care of it." Entire cities blown away in Western China and whole great kingdoms in Africa, the collapse of agriculture in Meso-America, ghost towns in North America where the water gave out. None of it mattered. There would always be enough water because, well, there just had to be.
The one who took me seriously was a visiting Israeli Professor Emeritus from Hebrew University who had taught at a number of universities in Arab countries under a discreet pseudonym. He told me that I was one of the very few people he'd met who got it. In his very learned professional opinion the real irreconcilable conflict in the Middle East isn't about religion or oil or tribal politics. It's about water.
Or as they said back home
Whiskey's fer drinkin'. Water's fer killin'.