depletions

Noun

depletion (countable and uncountable, plural depletions)

1. The act of depleting, or the state of being depleted; exhaustion.
   • The Great Northern 4-4-0s have all vanished, and there has been some depletion in the ranks of North British "Glens" and "Scotts."1954 May, John W. Grant, “A Railway Requiem”, in Railway Magazine, page 351
2. The consumption of a resource faster than it can be replenished.
3. (archaic) The act of relieving congestion or plethora, by purging, blood-letting, or reduction of the system by abstinence.
4. (timber industry, oil industry) gradual expense or use of natural resources over time.