Runoff, run-off or RUNOFF may refer to: *

Runoff (hydrology) Runoff is the flow of water across the earth, and is a major component in the hydrological cycle. Runoff that flows over land before reaching a watercourse is referred to as ''surface runoff'' or ''overland flow''. Once in a watercourse, runoff is ...

, the flow of water over land ** Channel runoff, the confined flow of water **

Surface runoff Surface runoff (also known as overland flow or terrestrial runoff) is the unconfined flow of water over the ground surface, in contrast to ''channel runoff'' (or ''stream flow''). It occurs when excess rainwater, stormwater, meltwater, or other ...

, the unconfined flow of water over land ** Runoff model (reservoir), a mathematical model involving rainfall and runoff **

Runoff curve number The runoff curve number (also called a curve number or simply CN) is an empirical parameter used in hydrology for predicting direct runoff or infiltration from rainfall excess. The curve number method was developed by the USDA Natural Resources C ...

, an empirical parameter used in hydrology * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock market term * Runoff voting system, also known as the

two-round system The two-round system (TRS or 2RS), sometimes called ballotage, top-two runoff, or two-round plurality, is a single-winner electoral system which aims to elect a member who has support of the majority of voters. The two-round system involves one ...

, a voting system where a second round of voting is used to elect one of the two candidates receiving the most votes in the first round **

Instant-runoff voting Instant-runoff voting (IRV; ranked-choice voting (RCV), preferential voting, alternative vote) is a single-winner ranked voting election system where Sequential loser method, one or more eliminations are used to simulate Runoff (election), ...

, an extension or variation of runoff voting where a second round can be rendered unnecessary by voters ranking candidates in order of preference *

Run-off area A run-off area is an area on a motorsport race track used for racer safety. Run-off areas are usually located along a road racing circuit where racers are most likely to unintentionally depart from the prescribed course. There are different types ...

, a racetrack safety feature * Runoff (2014 film) directed by Kimberly Levin

See also