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Page "Ogallala Aquifer" ¶ 29
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depletion and aquifer
Water conservation practices ( terracing and crop rotation ), more efficient irrigation methods ( center pivot and drip ), and simply reduced area under irrigation have helped to slow depletion of the aquifer, but levels are generally still dropping.
However, the constant irrigation has caused a rapid drop in the water table, in some places as much as eight meters per year, one of the fastest rates of aquifer depletion in the world.
One reason for the renewed interest is the substantial depletion of the Odessa aquifer.
In the case of groundwater there is a safe yield of water extraction per unit time, beyond which the aquifer risks the state of overdrafting or even depletion.
The population is threatened by chance events and aquifer depletion that threatens to drain the lake.

depletion and device
In an n-channel depletion-mode device, a negative gate-to-source voltage causes a depletion region to expand in width and encroach on the channel from the sides, narrowing the channel.
In a p-channel depletion-mode device, a positive voltage from gate to body creates a depletion layer by forcing the positively charged holes away from the gate-insulator / semiconductor interface, leaving exposed a carrier-free region of immobile, negatively charged acceptor ions.
Considering again an n-channel device, a depletion region exists in the p-type body, surrounding the conductive channel and drain and source regions.
A MESFET, or metal – semiconductor FET, is a device similar in operation to the JFET, which utilizes a reverse biased Schottky barrier to provide the depletion region.
The device depends on a depletion layer between N-type and P-type semiconductors to serve its purpose ; when these are very heavily doped the depletion layer can be thin enough for tunnelling.
In this case, the depletion region extends all over the n-type channel at zero gate voltage in a normally “ off ” device ( it is similar to the larger positive bias in MISFET case ).
This structure suggests that there is no depletion region to separate the device from the substrate.
DLTS investigates defects present in a space charge ( depletion ) region of a simple electronic device.
( In this device there is a limit to how wide the depletion width may become.

depletion and contributing
Over-population is already straining the " carrying capacity " of the middle hill areas, particularly the Kathmandu Valley, resulting in the depletion of forest cover for crops, fuel, and fodder and contributing to erosion and flooding.
With emissions of greenhouse gases suspected of contributing to climate change, the use of these elements as industrial metals is called into question, despite the depletion of rarer and less reactive chalcophile metals leaving few substitutes.
Though, more recently, bore-wells have cropped up and their uncontrolled and unmanaged rapid growth is contributing to rapid depletion of local ground water tables.
In his 1993 book, Ecoscam, and other works, Bailey criticized claims that CFCs contribute to ozone depletion and that human activity was contributing to global warming.

depletion and second
The first term on the right side of the carrier rate equation is the injected electrons rate ( I / eV ), the second term is the carrier depletion rate due to non-radiative recombination processes ( described by the decay time ) and the third term is the carrier depletion due to stimulated recombination, which is proportional to the photon density and medium gain.
In 2008 it was reported that Cassini observations of a depletion of energetic electrons in Saturn's magnetosphere near Rhea might be the signature of a tenuous ring system around Saturn's second largest moon.
Haploinsufficiency of the Treacle protein leads to a depletion of the neural crest cell precursor, which leads to a reduced number of crest cells migrating to the first and second pharyngeal arches.
The second is that the fetus itself may promote local immunosuppression in the mother, perhaps by a process of active nutrient depletion.
Enormous economic and population growth worldwide in the second half of the twentieth century aggravated the factors that threaten health and the world — ozone depletion, climate change, depletion, fouling of natural resources, and extensive loss of biodiversity and habitat.
Oil depletion occurs in the second half of the production curve of an oil well, oil field, or the average of total world oil production.

depletion and David
Shortly after crossing, Dr. Rodney McKay ( David Hewlett ) determines that because of the immediate depletion of power due to their arrival, the shield protecting the city from the ocean water, will imminently collapse.

depletion and novel
The novel Infinity Welcomes Careful Drivers mentions the Earth, despite Lister's regard for it, as suffering from massive littering and environmental damage ; with a giant toupee being installed to in order to cover up ozone depletion.

depletion and Earth
* Primary scientific data was collected in Punta Arenas, Chile, using a Brewer spectro-photometer, and " These results indicate that during the time when ozone depletion in the Antarctica takes place, an increase in UV-B radiation reaching the Earth surface affected the American continent at latitudes about parallel 50 ° S ."
The side of Earth facing the GRB would receive potentially lethal radiation exposure, which can cause radiation sickness in the short term, and in the long term result in serious impacts to life due to ozone layer depletion.
One major component of environmental degradation is the depletion of the resource of fresh water on Earth.
In the past, the main drivers of global change have been solar variation, plate tectonics, volcanism, proliferation and abatement of life, meteorite impact, resource depletion, changes in Earth ’ s orbit around the sun and changes in the tilt of Earth on its axis.

depletion and 1990
In 1990 he claimed that 1998 would represent a " depletion midpoint.

depletion and ).
* Mass transport loss ( depletion of reactants at catalyst sites under high loads, causing rapid loss of voltage ).
Some point out that such techniques may be the only way to provide rising standards of living without being stopped by pollution or by depletion of Earth's resources ( for example peak oil ).
There is much debate worldwide over natural resource allocations, this is partly due to increasing scarcity ( depletion of resources ) but also because the exportation of natural resources is the basis for many economies ( particularly for developed nations such as Australia ).
Increases in surface UV are inferred ( see ozone depletion ).
Land subsidence in Bangkok area resulting from the depletion of the water table ; droughts ( see also 2004 Indian Ocean earthquake and 2011 Thai floods ).
Scientists have been increasingly able to attribute the observed ozone depletion to the increase of man-made ( anthropogenic ) halogen compounds from CFCs by the use of complex chemistry transport models and their validation against observational data ( e. g. SLIMCAT, CLaMS — Chemical Lagrangian Model of the Stratosphere ).
Ozone hole in North America during 1984 ( abnormally warm reducing ozone depletion ) and 1997 ( abnormally cold resulting in increased seasonal depletion ).
As explained above, the primary cause of ozone depletion is the presence of chlorine-containing source gases ( primarily CFCs and related halocarbons ).
The Cl-catalyzed ozone depletion can take place in the gas phase, but it is dramatically enhanced in the presence of polar stratospheric clouds ( PSCs ).
Since the 1970s, public awareness, environmental sciences, ecology, and technology have advanced to include modern focus points like ozone depletion, global climate change, acid rain, and the potentially harmful genetically modified organisms ( GMOs ).
In the early 1990s, because of their impact on ozone depletion, the Montreal Protocol led to the greatly reduced use of many chlorine-containing blowing agents, such as trichlorofluoromethane ( CFC-11 ).
Transferrin levels are typically elevated at times of iron depletion ( low ferritin stimulates the release of transferrin from the liver ).
There have been claims of prey depletion by seabirds of fishery stocks, and while there is some evidence of this, the effects of seabirds are considered smaller than that of marine mammals and predatory fish ( like tuna ).
In particular, sodium loss can lead to a state of volume depletion, with volume depletion serving as signal for the release of ADH ( anti-diuretic hormone ).
Where in a p-n diode the reverse recovery time can be in the order of hundreds of nanoseconds and less than 100 ns for fast diodes, Schottky diodes do not have a recovery time, as there is nothing to recover from ( i. e. no charge carrier depletion region at the junction ).
Fluid replacement is also indicated in fluid depletion due to hemorrhage, extensive burns and excessive sweating ( as from a prolonged fever ), and prolonged diarrhea ( cholera ).
In fact, in the semiconductor, a depletion region is created by the metal electrons, which " push " away semiconductor electrons ( simplification, see depletion region article ).
The regions nearby the p – n interfaces lose their neutrality and become charged, forming the space charge region or depletion layer ( see figure A ).
While more consistent with resource depletion theory ( RDT ) than with the confluence model, these findings also cast doubt upon the claim that RDT is the sole cause of any correlation that in fact exists: Were RDT the exclusive explanation, only children would have an advantage over firstborns ( given that siblings divert at least some resources from both " true " and " functional " firstborns regardless of age difference ).
In diseases featuring excess vomiting, patients develop hypochloremic metabolic alkalosis ( decreased blood acidity by H < sup >+</ sup > and chlorine depletion ).
As the acceleration effect dictates that the increase of income accelerates capital accumulation, and the decrease of income accelerates capital depletion ( in a simple model ), this might cause the system to become unstable or cyclical, and hence many kinds of business cycle models are of this kind ( the multiplier-accelerator cycle models ).

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