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runoff |
Also found in: Dictionary/thesaurus, Legal, Financial, Wikipedia, Hutchinson | 0.10 sec. |
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runoff 1. a. an extra race to decide the winner after a tie b. a contest or election held after a previous one has failed to produce a clear victory for any one person 2. that portion of rainfall that runs into streams as surface water rather than being absorbed into ground water or evaporating runoff [′rən‚ȯf] (hydrology) Surface streams that appear after precipitation. The flow of water in a stream, usually expressed in cubic feet per second; the net effect of storms, accumulation, transpiration, meltage, seepage, evaporation, and percolation. (mining engineering) Collapse of a coal pillar in a mine. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Under pressure to take steps to clean urban runoff and improve water quality, the Los Angeles City Council on Wednesday approved spending more than $230 million on projects ranging from cleaning up lakes to dealing with storm-drain runoff. Last month, a panel convened by the State Water Resources Control Board concluded in a report that numeric limits for the amount of pollutants that can be discharged into runoff can be established for both construction and industrial sites throughout the entire state. To gauge the relative importance of the transpiration change to global freshwater flow, Stott and his colleagues compared actual river-runoff data from the past century with runoff calculated in models that take account of climate change, solar radiation, deforestation, and carbon dioxide--driven changes in transpiration. |
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