RESULTS 



OPERATION I 



TURBIDITY 



During Operation I, turbid water, with light trans- 

 mission 50 percent and less, was confined in a layer approxi- 

 mately 12 to 30 feet thick (fig. 10). The maximum turbidity 

 was at 38 feet at 1800 and moved upward during the night to 

 center above 20 feet. From this point the turbid layer 

 thickened, 50-percent water reaching a depth of 30 feet, 

 then again rose toward the surface as observations were 

 terminated. Light transmission during this operation 

 ranged from less than 30 percent (extremely dirty water) 

 to over 80 percent (relatively clear water),, During the 

 period of observations transparency values for water near 

 the surface fluctuated from 30 to 72 percent. Bottom read- 

 ings were characterized by clearest water with transparency 

 values considerably over 50 percent. 



X 30 - 



1800 



2200 



0200 0600 

 TIME (HOURS) 



1000 



1400 



Figure 10. Water transparency (percent transmission), Operation I. 



26 



