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Aquifers provide us freshwater that makes up for surface water lost from drought-depleted lakes, rivers, and reservoirs. We are drawing down these hidden, mostly nonrenewable groundwater supplies at unsustainable rates in the western United States and in several dry regions globally, threatening our future.
We are at our best when we can see a threat or challenge ahead. If flood waters are rising, an enemy is rushing at us, or a highway exit appears just ahead of a traffic jam, we see the looming crisis and respond.
We are not as adept when threats—or threatened resources—are invisible. Some of us have trouble realizing why invisible carbon emissions are changing the chemistry of the atmosphere and warming the planet. Because the surface of the sea is all we see, it's difficult to understand that we already have taken most of the large fish from the ocean, diminishing a major source of food. Neither of these crises are visible—they are largely out of sight, out of mind—so it's difficult to get excited and respond. Disappearing groundwater is another out-of-sight crisis.
We are at our best when we can see a threat or challenge ahead. If flood waters are rising, an enemy is rushing at us, or a highway exit appears just ahead of a traffic jam, we see the looming crisis and respond.
We are not as adept when threats—or threatened resources—are invisible. Some of us have trouble realizing why invisible carbon emissions are changing the chemistry of the atmosphere and warming the planet. Because the surface of the sea is all we see, it's difficult to understand that we already have taken most of the large fish from the ocean, diminishing a major source of food. Neither of these crises are visible—they are largely out of sight, out of mind—so it's difficult to get excited and respond. Disappearing groundwater is another out-of-sight crisis.
Scarce groundwater supplies also are being used for energy. A recent study from CERES, an organization that advocates sustainable business practices, indicated that competition for water by hydraulic fracturing—a water-intensive drilling process for oil and gas known as "fracking"—already occurs in dry regions of the United States. The February report said that more than half of all fracking wells in the U.S. are being drilled in regions experiencing drought, and that more than one-third of the wells are in regions suffering groundwater depletion.
originally posted by: ketsuko
Nice condescending attitude. Just because I don't think we can affect overall global climate doesn't mean I don't think we can have serious regional impact - see the Dust Bowl.
Yes, one of the problems Californians are going to have is that they are draining their aquifers in the recent drought. There isn't enough refill. It has been speculated that part of the seismic activity in California recently is due to aquifer subsidence, meaning those aquifers will not refill even when the water comes back.
originally posted by: Hijinx
a reply to: FyreByrd
The water isn't disappearing, it's just going elsewhere. We do not destroy water, it evaporates and condenses over and over again. Now, this isn't to say that water is no longer in regions it was before, this is known as climate change....
A lot of parts of the world were much different than they are today my friend.
originally posted by: rickymouse
Very good and truthful article. Many people do not believe we can run out of fresh clean water and waste it. They think our city just drilled two new wells, we have lots of water. Not thinking the last aquifer was depleted in ten years.
The underground water is not unlimited, sometimes it cannot replenish itself anymore because it was put there long ago and something sealed the ground long ago so it couldn't refill, usually a clay layer.
The Ogallala was the largest underground body of fresh water in the world and it does not replenish itself. Twenty percent of US corn comes from this former 1930’s and 40’s dust bowl. The dust bowl ended when pumping equipment was developed to reach the Ogallala Aquifer. Most of the irrigation is done using flood or rotary systems which waste exponentially more water than plant’s use.
~~~
The Ogallala has gone from an average depth of 240 feet to an average depth of 80 feet in 50 years.
Do we really need to drink the ocean because our freshwater supplies are running low?
The corporations selling ocean desalination certainly want you to think that taking salt out of seawater is our best and only remaining water option. Yet research at Food & Water Watch exposes ocean desalination as an expensive and dangerous technology that policymakers consider at the risk of our public water supply.
We found:
Ocean desalination costs more than any other option
Ocean desalination uses more energy than any other option–which means bigger contributions to global warming
Desalination technology can kill marine life
Desalination creates water pollution
Desalination can fail to remove harmful chemicals from your drinking water
Desalination projects invite corporate abuse of your public water systems
Desalination is not necessary – we have other alternatives
Due to its high cost, energy intensiveness and overall ecological footprint, most environmental advocates view desalinization (or desalination)‚ the conversion of salty ocean water into fresh water‚ as a last resort for providing fresh water to needy populations. Sourcing fresh water from streams, rivers, lakes and underground aquifers and adhering to strict water conservation measures are much more viable for both economic and environmental reasons in most situations, although some desert regions with thirsty and growing populations may not have many such options.
In fact, Orange County has a model water recycling operation down the road in Fountain Valley, where sewage water is purified in a treatment plant and then pumped to large ponds to percolate into the groundwater supply. This costs about $900 an acre foot and uses one-third the amount of electricity of a desalination plant, according to the Orange County Water District. And it reuses wastewater rather than sticking a straw in the ocean.
Salinity, temperature and density
Deaeration and oxygen scavengers
Chlorine
Heavy metals
Antiscalants
Coagulants and coagulant aids
Antifoaming agents
Cleaning chemicals