0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 



TIME (HOURS) 



Figure 31. Water transparency (percent transmission), with temperature (°F) in red, 23 July 1964. 



CHANGE IN< 10 MINUTES 



(B) ASCENT (A) DESCENT 



I 1 1 \l 1 11 



1 1 1 



TUR3ID WATER ^ \ 



CLEAR WATER 



- 



^ 



1 1 1 1 1 1 .. 



> 



10 20 30 40 50 60 70 

 TRANSMISSION (PERCENT) 



90 100 



Figure 32. Hydrophotometer records on descent before maximum patch of red water arrived 

 at the tower (A) and on ascent approximately 10 minutes later when patch of red water 

 moved under the tower (B). 



53 



