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  2. Sources and sinks - Wikipedia

    en.wikipedia.org/wiki/Sources_and_sinks

    From left to right: a field with a source, a field with a sink, a field without either. In the physical sciences, engineering and mathematics, sources and sinks is an analogy used to describe properties of vector fields. It generalizes the idea of fluid sources and sinks (like the faucet and drain of a bathtub) across different scientific ...

  3. Biogeochemical cycle - Wikipedia

    en.wikipedia.org/wiki/Biogeochemical_cycle

    The source Q is the flux of material into the reservoir, and the sink S is the flux of material out of the reservoir. The budget is the check and balance of the sources and sinks affecting material turnover in a reservoir. The reservoir is in a steady state if Q = S, that is, if the sources balance the sinks and there is no change over time. [25]

  4. Marine biogeochemical cycles - Wikipedia

    en.wikipedia.org/wiki/Marine_biogeochemical_cycles

    The second sulfur sink is pyrite burial in shelf sediments or deep seafloor sediments (4 × 10 13 g/year; δ 34 S = -20‰). [94] The total marine sulfur output flux is 1.0 × 10 14 g/year which matches the input fluxes, implying the modern marine sulfur budget is at steady state. [93] The residence time of sulfur in modern global oceans is ...

  5. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet is a multi-national American company that provides tools for studying and learning. [1] Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [ 2 ] and released to the public in January 2007. [ 3 ]

  6. Drainage basin - Wikipedia

    en.wikipedia.org/wiki/Drainage_basin

    Drainage basins are similar but not identical to hydrologic units, which are drainage areas delineated so as to nest into a multi-level hierarchical drainage system. Hydrologic units are defined to allow multiple inlets, outlets, or sinks. In a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage ...

  7. Sink - Wikipedia

    en.wikipedia.org/wiki/Sink

    A sink/basin in a bathroom Enamel washbowl and jug Sink in Croatian National Theater in Zagreb, Croatia. A sink (also known as basin in the UK) is a bowl-shaped plumbing fixture for washing hands, dishwashing, and other purposes. Sinks have a tap (faucet) that supplies hot and cold water and may include a spray feature

  8. Anoxic waters - Wikipedia

    en.wikipedia.org/wiki/Anoxic_waters

    The US Geological Survey defines anoxic groundwater as those with dissolved oxygen concentration of less than 0.5 milligrams per litre. [1] Anoxic waters can be contrasted with hypoxic waters, which are low (but not lacking) in dissolved oxygen. This condition is generally found in areas that have restricted water exchange.

  9. Basin - Wikipedia

    en.wikipedia.org/wiki/Basin

    Sink, a plumbing fixture; Toilet basin, an alternate name for the bowl (pan) of a flush toilet; Wash basin, a sink or bowl to contain water for cleaning hands and other minor washing Basin stand or washstand, an obsolete piece of furniture to hold a wash basin, jug, towel, etc.