Refers to the consumption of natural resources which are part of a company's assets Since oil, mining and gas companies deal in products that cannot be replenished, depletion reduces the company's natural assets over a specified time period The recording of depletion is a bookkeeping entry similar to depreciation and does not involve the expenditure of cash
A laboratory procedure for reducing the numbers of a specific cell type within bone marrow donated for transplantation One example is T lymphocyte depletion or removal It is done to minimize immune reactivity of donor cells This step may be used to decrease the likelihood or severity of graft versus host disease in circumstances in which donor-recipient matching is imperfect (particularly in relation to unrelated donor transplants)
The process by which the cost or other basis of a natural resource (for example, an oil and gas interest) is recovered upon extraction and sale of the resource The two ways to determine the depletion allowance are the cost and percentage methods, both of which are defined elsewhere in this glossary
The progressive withdrawal of water from surface- or ground-water reservoirs at a rate greater than that of replenishment (see Recession curve and streamflow depletion )
Removal of only the solids of the EDP (Electro-deposition process ) bath The solids are continuously deposited out while other ingredients remain and build up
The result of the extraction of abiotic resources (non-renewable) from the environment or the extraction of biotic resources (renewable) faster than they can be renewed
Loss of water from surface water reservoirs or groundwater aquifers at a rate greater than that of recharge, or the amount of water that does not return to the source of supply after diversion
1 A form of capital recovery applicable to extractive property (e g , mines) Can be on a unit-of-output basis the same as straight-line depreciation related to original or current appraisal of extent and value of deposit (known as cost depletion) Can also be a percentage of income received from extractions (known as percentage depletion) 2 A lessening of the value of an asset due to a decrease in the quantity available It is similar to depreciation except that it refers to such natural resources as coal, oil, and timber in forests
A water use term The water consumed within a service area and no longer available as a source of supply For agriculture and wetlands, it is evapotranspiration of applied water (ETAW) and evapotranspiration (ET) of flooded wetlands, plus irrecoverable losses For urban water use, it is ETAW (water applied to landscaping or home gardens), sewage effluent that flows to a salt link, and incidental ET losses For instream use, it is the amount of dedicated flow that becomes groundwater and is not available for reuse
The consumption or exhaustion of wasting property - such as, royalties, patent rights, mines, oil and gas wells, quarries, timberlands, and other things that are consumed or worn out in the sing
is the result of the extraction of abiotic resources (non-renewable) from the environmentor the extraction of biotic resources (renewable) faster than they can be renewed
An income tax allowance reflecting the purchase price paid for merchantable timber, usually on fee simple land Also, a term used to refer to the process of harvesting your growing stock
The region of a semiconductor in which an electric field has swept out any free charge carriers such as electrons The field can be applied by a voltage to a metal electrode on the surface of the silicon
A system similar to depreciation that allows the owner of natural resources (for example: a coal mine or an oil well) to deduct a portion of the cost of the asset during each year of its presumed productive life
The amount of cost assigned to the extracted portion of a natural resource such as minerals You take a depreciation deduction on equipment and buildings, and you take a depletion deduction on your mining operation