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  2. Nonpoint source pollution - Wikipedia

    en.wikipedia.org/wiki/Nonpoint_source_pollution

    Although this is a point source, due to the distributional nature, long-range transport, and multiple sources of the pollution, it can be considered as nonpoint source in the depositional area. Atmospheric inputs that affect runoff quality may come from dry deposition between storm events and wet deposition during storm events.

  3. Point source pollution - Wikipedia

    en.wikipedia.org/wiki/Point_source_pollution

    A point source of pollution is a single identifiable source of air, water, thermal, noise or light pollution. A point source has negligible extent, distinguishing it from other pollution source geometrics (such as nonpoint source or area source). The sources are called point sources because in mathematical modeling, they can be approximated as ...

  4. United States regulation of point source water pollution

    en.wikipedia.org/wiki/United_States_regulation...

    Permitted point sources can trade with other point sources or nonpoint sources. Trades can occur directly, or be brokered by third parties. However, when dealing with nonpoint source reductions, a level of uncertainty does exist. In order to address this, monitoring should be conducted. Modeling can also be used as a supplement to monitoring.

  5. Water pollution - Wikipedia

    en.wikipedia.org/wiki/Water_pollution

    Sources of water pollution are either point sources or non-point sources. [4] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant, or an oil spill. Non-point sources are more diffuse. An example is agricultural runoff. [5] Pollution is the result of the cumulative effect over time. Pollution may take ...

  6. Nonpoint source water pollution regulations in the United ...

    en.wikipedia.org/wiki/Nonpoint_source_water...

    Runoff of soil and fertilizer on a farm field during a rain storm. Nonpoint source (NPS) water pollution regulations are environmental regulations that restrict or limit water pollution from diffuse or nonpoint effluent sources such as polluted runoff from agricultural areas in a river catchments or wind-borne debris blowing out to sea.

  7. Point source - Wikipedia

    en.wikipedia.org/wiki/Point_source

    A point source of fluid is the inverse of a fluid point sink (a point where fluid is removed). Whereas fluid sinks exhibit complex rapidly changing behavior such as is seen in vortices (for example water running into a plug-hole or tornadoes generated at points where air is rising), fluid sources generally produce simple flow patterns, with ...

  8. Nonpoint source - Wikipedia

    en.wikipedia.org/wiki/Nonpoint_source

    Nonpoint source, or non-point source, or NPS, is a source that does not come from a single point. Point source , contrasts with nonpoint source Nonpoint source pollution , water pollution

  9. Pollution - Wikipedia

    en.wikipedia.org/wiki/Pollution

    The point at which the social marginal cost and market demand intersect gives the socially optimal level of pollution. At this point, the quantity will be lower and the price will be higher in comparison to the free market equilibrium. [93] Therefore, the free market outcome could be considered a market failure because it "does not maximize ...