Supersaturation of Lake Water with a Precaution to Hatchery Usage
- 1 April 1967
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 96 (2) , 194-201
- https://doi.org/10.1577/1548-8659(1967)96[194:solwwa]2.0.co;2
Abstract
Water temperature and dissolved oxygen content were measured vertically in Cultus Lake on 20 occasions and dissolved N 8 times during 1961. The results showed the water in the region of the thermocline became supersaturated markedly as a consequence of warming during the spring and summer. The excess gas was below the extent of surface mixing and was held in solution by the hydrostatic pressure. In mid-July at a depth of 30 ft., O2 was 126% and N 116% of air saturation. By mid-Sept. at a depth of 50 ft., O2 saturation was 94% and N 110% of air saturation. O2 was liberated by photosynthesis in the epilimnion and upper portion of the thermocline, and consumed in the lower part of the thermocline and the upper hypolimhion. Thus N supersaturation could not be diagnosed by measurement of dissolved 02 alone. N supersaturation is discussed in relation to the use of lake water for hatchery culture of fish.This publication has 1 reference indexed in Scilit: