Zobrazenie zdroja stránky Point source pollution

:Slovak term: [[Slovenský termín]]
# A pollution input that can be related to a single outlet (UNEP et al. 1997)

==Explanation==
As point sources are localised, spatial profiles of the quality of the aquatic environment may
be used to locate them. Some point sources are characterised by a relatively constant
discharge of the polluting substances over time, such as domestic sewers, whereas others
are occasional or fluctuating discharges, such as leaks and accidental spillages. A sewage
treatment plant serving a fixed population delivers a continuous load of nutrients to a
receiving water body. Therefore, an increase in river discharge causes greater dilution and
a characteristic decrease in river concentration. This contrasts with atmospheric deposition
and other diffuse sources where increased land run-off often causes increased pollutant
concentrations in the receiving water system (UNEP et al. 1997).

==Example==

==References==
* UNEP, Water Supply & Sanitation Collaborative Council and WHO (1997) [http://www.who.int/water_sanitation_health/resources/watpolcontrol/en/index.html Water pollution control : a guide to the use of water quality management principles]

==Links==
* [http://apps.who.int/thelexicon/ WHO — The Health and Environment Lexicon]

[[Category:EN]]