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Analysis of Variations in Dissolved Oxygen in an Impoundment in Central Illinois
Author(s) -
Kothandaraman V.,
Evans Ralph L.
Publication year - 1971
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr007i004p01037
Subject(s) - hydrology (agriculture) , limiting , environmental science , water quality , spectral analysis , geology , physical geography , atmospheric sciences , oceanography , ecology , geography , biology , physics , geotechnical engineering , quantum mechanics , spectroscopy , engineering , mechanical engineering
Spectral analysis is employed to investigate the nature of variations in dissolved oxygen concentrations in Lake Bloomington by using an 18‐month record of weekly observations. At the deepest portion of the lake, seasonal changes with a periodicity of 4 months are found to be significant; this corroborates findings based on chemical water quality changes. The results of spectral analysis of DO records at 0.61‐meter depth of different stations in the lake are similar. The upper layers of the entire lake respond alike to the changes in DO concentrations. Long‐term and random variations in the observations are thought to be the predominant features of the DO record. The limiting depth of the epilimnetic zone in the lake, as defined by temperature and DO, appears to be about 6.10 meters.