Note: Data are provisional unless otherwise stated

The plots are produced from the most recently uploaded data from the robots. They are representative of the conditions at the time the measurements were made.

The first plot below shows the maximum and minimum density of Onondaga Lake for the past 28 days.  The second plot below shows the density of Onondaga Creek during the same time period. The last time-series shows the estimated depth that the creek would plunge to in the lake, assuming that density and temperature are unchanged from Dorwin Avenue to the South Deep station (revisit the Density Currents discussion to see why this might not be the best assumption). 

The remaining two figures show the most recent South Deep profile. The first figure shows the density profile calculated from the most recent temperature and specific conductivity profiles (shown).  The second figure shows the most recent South Deep profiles including all measured parameters.  From these plots we might observe evidence of density currents (such as mid-profile minima or maxima in specific conductivity (SC) or maxima in turbidity (Tn)).   Prior to fall turnover, there may exist an increase in dissolved oxygen in the lower waters signifying underflow of oxygenated water. See discussion of density currents for more explanation of this phenomenon.

Onondaga Creek density and plunge depth over the past year

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Last Modified: Tuesday, July 01, 2008