Cook Plant preoperational studies 1970 / John C. Ayers ... [et al.].

generating plant results in change of DO.
The experimental results for phytoplankton showed the bagged-water technique to be feasible, but they also indicate that the patchy distribution of
plankton in the lake is not smoothed out by passage through a plant.
The phytoplankton results are summarized in Table 18. The table includes
all the species that were common to the six experimental bags. Each pair of
duplicate bags (OA-1, OA-2 and OP-1, OP-2) was filled in succession in a few
minutes and water for the IA and IP bags was taken at the intake within a few
minutes. The variation in counts within these paired samples is considerably
greater than the error of our method (about plus or minus 25%, but still in
process of being refined) and is taken to indicate short-term patchiness of
the plankton populations. The degrees of count variation between the three
sets of paired samples are about the same, and also appear to show patchiness
of the population. Effects of waste heat on the phytoplankton types or numbers
were, if present, small and masked by the population patchiness.
In future experiments all bags will be run in duplicate, phytoplankton
subsamples from each bag will be in duplicate, and from each subsample duplicate aliquots will be counted. This will give eight values with which to
evaluate each of the four parts of each total plume experiment. This seems
to be a workable compromise between statistical desirability and the counting
of a prohibitive number of samples.
The results of the zooplankton experiments, also, showed the bagged-water
techniques to be feasible; they, also, indicated patchiness of plankton population; and they, also, indicated some areas of needed improvement.
The zooplankton results are summarized in Table 19.
The variations in zooplankter numbers between duplicate bags indicate
short-term patchiness of the population; though the bags were filled one after
the other, in a few minutes the variations are present. Since the total bag

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