TERMIUM Plus®

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TRANSITION LAKE [1 record]

Record 1 2004-01-20

English

Subject field(s)
  • Hydrology and Hydrography
  • Air Pollution
DEF

A lake whose buffering capacity is fully or nearly exhausted and risks turning acidic.

CONT

... 1. bicarbonate lakes, where original alkalinity was high and/or added H+ is low, so that the lakes remain bicarbonate buffered; 2. acid lakes, where original alkalinity was low relative to acid inputs, and all bicarbonate appears to have been depleted by the acid addition; and 3. transition lakes, in which bicarbonate appears to be undergoing reduction (or is almost depleted) and large pH fluctuations occur during runoff events.

French

Domaine(s)
  • Hydrologie et hydrographie
  • Pollution de l'air
  • 4
DEF

Lac qui est sujet à devenir acide parce que le pouvoir tampon, qui lui permet de neutraliser les apports de substances acides, est épuisé ou en voie d'épuisement.

CONT

Les conclusions sur la nature et l'étendue de l'acidification des lacs du Québec, [...] viennent bouleverser plusieurs notions qui semblaient acquises jusqu'à maintenant. Ainsi, les chercheurs d'INRS-Eau y écrivent qu'«il est actuellement impossible d'estimer, pour chaque région de façon suffisamment précise et rigoureuse, le nombre et la proportion des lacs acides ou en transition».

OBS

Pour de plus amples renseignements sur cette notion, consulter le cahier de néologie sur les pluies acides (OLFNE 1985 no 40-41).

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
  • Contaminación del aire
DEF

Lago en vías de acidificarse al alcanzarse los límites de su poder tampón.

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