water pollution

water pollution
State resulting when substances are released into a body of water, where they become dissolved or suspended in the water or deposited on the bottom, accumulating to the extent that they overwhelm its capacity to absorb, break down, or recycle them, and thus interfering with the functioning of aquatic ecosystems.

Contributions to water pollution include substances drawn from the air (see acid rain), silt from soil erosion, chemical fertilizers and pesticides, runoff from septic tanks, outflow from livestock feedlots, chemical wastes (some toxic) from industries, and sewage and other urban wastes from cities and towns. A community far upstream in a watershed may thus receive relatively clean water, whereas one farther downstream receives a partly diluted mixture of urban, industrial, and rural wastes. When organic matter exceeds the capacity of microorganisms in the water to break it down and recycle it, the excess of nutrients in such matter encourages algal water blooms. When these algae die, their remains add further to the organic wastes already in the water, and eventually the water becomes deficient in oxygen. Organisms that do not require oxygen then attack the organic wastes, releasing gases such as methane and hydrogen sulfide, which are harmful to the oxygen-requiring forms of life. The result is a foul-smelling, waste-filled body of water. See also eutrophication.

* * *

Universalium. 2010.

См. также в других словарях:

  • Water pollution — Raw sewage and industrial waste flows across international borders New River passes from Mexicali to Calexico, California. Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). Water p …   Wikipedia

  • water pollution — vandens tarša statusas Aprobuotas sritis karo inžinerija apibrėžtis Fiziniai, cheminiai ar biologiniai vandens savybių pokyčiai, kenkiantys gėlo arba jūros vandens ekosistemoms. atitikmenys: angl. water pollution pranc. pollution des eaux… …   Lithuanian dictionary (lietuvių žodynas)

  • water pollution — vandens tarša statusas T sritis ekologija ir aplinkotyra apibrėžtis Kenksmingųjų medžiagų (buitinių ir pramoninių nutekamųjų vandenų, žemės ūkio atliekų, transporto išmetamųjų dujų, naftos ir jos produktų, radioaktyviųjų medžiagų, trąšų,… …   Ekologijos terminų aiškinamasis žodynas

  • water pollution — The infection and contamination of a public water supply by dirt, bacteria, and coli, or any other infectious and contaminating material which renders the water unfit for domestic use and unsafe and dangerous to individuals. 56 Am J1st Watwk § 75 …   Ballentine's law dictionary

  • water pollution — noun pollution of the water in rivers and lakes • Hypernyms: ↑pollution …   Useful english dictionary

  • water pollution — noun contamination of water, especially surface water, by sewage effluent, fertilizer runoff, industrial chemical discharge etc …   Wiktionary

  • Water pollution — Загрязнение воды …   Краткий толковый словарь по полиграфии

  • Water Pollution Liability — Financial and legal responsibility for causing contamination to oceans, rivers, lakes or streams. Entities that cause water pollution can be held liable for cleanup, regulatory fines, damage to third party property, third party loss of revenue,… …   Investment dictionary

  • Water pollution abatement equipment —   Equipment used to reduce or eliminate water borne pollutants, including chlorine, phosphates, acids, bases, hydrocarbons, sewage, and other pollutants. Examples of water pollution abatement structures and equipment include those used to treat… …   Energy terms

  • water pollution abatement — vandens apsauga statusas T sritis ekologija ir aplinkotyra apibrėžtis Teisinių aktų ir techninių priemonių visuma, sauganti vandenis nuo taršos ir kenksmingo poveikio. atitikmenys: angl. protection of waters; water conservation; water pollution… …   Ekologijos terminų aiškinamasis žodynas

Поделиться ссылкой на выделенное

Прямая ссылка:
Нажмите правой клавишей мыши и выберите «Копировать ссылку»