Contribution
Lake mixis and internal phosphorus dynamics
Osgood, Richard A.
Archiv für Hydrobiologie Volume 113 Number 4 (1988), p. 629 - 638
30 références bibliographiques
publié: Nov 7, 1988
DOI: 10.1127/archiv-hydrobiol/113/1988/629
ArtNo. ESP141011304009, Prix: 29.00 €
Abstract
The contribution of internal phosphorus supplies to the summertime epilimnion is related to duration and extent of mixis for lakes of the Twin Cities Metropolitan Area, Minnesota. The ratio of mean depth to the square root of surface (ž/Ao0.5) area is closely correlated with the fraction of lake volume involved in mixis and the duration of summertime mixis. Since these two factors were not measured precisely in most lakes, ž/Ao0.5 was used as a surrogate. A steady-state phosphorus model was modified by incorporating lake mixing volume and the duration of summertime stratification. This model, which replicated observations from 96 TCMA lakes, demonstrated elevated summertime surface phosphorus concentrations in polymictic lakes.
Mots-clefs
phosphorus • lake • polymictic lakes