Just as serious is the depletion of the aquifers on which farmers depend.
Experts are still refining the count: the American-Mexico border may include 8, 10, 18 or 20 aquifers, depending on how you measure them.
With no surface water, few aquifers, and little rainfall, the city used desalinization plants to convert ocean water to freshwater, ornamenting the city with golf courses, gardens, and palm trees.
The West Bank offered aquifers and made a good security buffer; it and the Gaza Strip provided cheap Palestinian labour and housing land; and building new Jewish neighbourhoods around East Jerusalem was a way for Israel to consolidate its hold on the holy city.
Much of Yemen's water is mined from rapidly depleting underground aquifers.
Cities there function like space stations, importing every ounce of fresh water from distant rivers or fossil aquifers.
With deeper aquifers so far thought to be arsenic-free, some municipal authorities in Bangladesh, and many in Vietnam, are drilling into lower sediments.
The pipeline route crosses rich farmland and important aquifers.
Depletion of aquifers is a looming tragedy. New agreements offer hope.
In many countries people can pump as much water as they like from underground aquifers, because rules are either lax or not enforced.
Additionally, samples from glacial and non-glacial sand and gravel aquifers consistently had more occurrences of trace elements in groundwater than samples from other aquifers.
In a carbon sequestration power plant (CCS), CO2 is extracted from the exhaust then pumped into aquifers and old gas fields several kilometres beneath the Earth's surface.
They collected core samples from freshwater aquifers in the US that overlie potential CCS sites and then studied their reaction to exposure to CO2 over the course of a year in the laboratory.
The term "sustained yield" is probably most useful has applied to the yield of well fields in situations that Thomas has termed "water-course aquifers".
After each application, these products soak into the soil, sometimes permanently polluting aquifers.
In the process of Shanxi formation seam mining in Shaqu Colliery, the seam roof and floor sandrock aquifers constitute the direct discharge aquifers.
The alluvial of Linhuan mine area in Huaibei consists of tour aquifers with three water resisting layers.
It may only be a matter of time before the toxic element also permeates deep aquifers in other Asian countries that follow the same practice, such as those around the Bengal Basin.
We could continue to build more DAMS and exploit deeper and deeper aquifers; but even if you can afford it, it's not a cost-effective way of doing things.
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