DATA REDUCTION AND 

 PRESENTATION 



The various materials in the water are divided into 

 three categories -- macroorganisms, microorganisms, and 

 inanimate particles. The categories are related to turbidity 

 and temperature structure. The maximum and minimum 

 counts are listed in tables 1 and 2. 



Time -depth plots were prepared to show the relative 

 concentrations of organisms. Because the organisms varied 

 greatly in concentration, an exponential contouring interval 

 was established which differs from organism to organism. 

 The highest count of each organism or entity per liter or milli- 

 liter of water for each operation was taken, and about 5 percent 

 of it was used as a base number to establish a contouring 

 interval. Contour intervals were established by successively 

 doubling the base number to depict ascending magnitudes of 

 population. The number of organisms per liter was entered 

 for each sample at the corresponding time and space, and 

 the above percentages were interpolated and contoured. On 

 occasions where they aided interpretation of the data 50- 

 percent increments in population density were used. These 

 increments appear on the charts as broken lines. 



Light transmission, corresponding in time and depth 

 to the water samples, was plotted, and the percentages 

 were interpolated. Comparisons were made between trans- 

 mission readings taken at the times of microplankton and 

 macroplankton runs. The same general patterns were 

 apparent. Because a lack of correlation between macro- 

 plankton and transparency data was evident, and to reduce 

 the number of figures, only light measurements made at the 

 time of microplankton runs are presented in the text. Trans- 

 parency charts taken at the time of the macroplankton runs 

 are in the appendix. Transparency data for both operations 

 have been superimposed on distribution charts. Depth scales 

 are given in reference to the mean tide level. Depth of any 

 sample or observation may be obtained by applying these 

 scales to the surface line. 



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