Figure 8, Time-depth plot of water transparency at the 

 USNEL tower on 2-3 August 1960. Times of high tide and 

 low tide are indicated along the surface. 



4-5 August 1960 (fig. 9) 



This 29-hour series was characterized by a periodic 

 and mid- depth turbid layer. After the first low tide the 

 mid-depth layer began to form, with maximum turbidity 

 occurring between 20 and 40 feet. At high tide and shortly 

 thereafter, the entire water column contained clearer water. 

 However, after the next low tide the water column again 

 became more turbid, especially at mid-depth levels. It 

 cleared again after the following high tide. The most notable 

 features here were the two very large patches of turbidity 

 that appeared to be related to the phase of the tide. 



W^" 



' ' 



^ ■ F T 



ir 5' 1 





1 TIP-. 



" r : ^^' 



T I 



' 1 > 1 ' r ] 



m^ 



m 



-^ 



"-_ 





-- 



\ 





~^ 



z 





' m 



i " 



k 



_ 



i ^~"''m'' 





^ h ~^M 



M 



iHiP 



i/ ' 



\ / _ 



1- 



'^ 





W 



\' ' J^ ^^ 



I wU 



^^^M i 



i / 



xj 



" u 





1 \ 



f n 







B 





f^ 



^V 







\l 



til/ \ 













1 



, 



, , 



, 



1400 ' 1600 1800 2000 2200 2400 0200 0400 0600 0800 I 



Figure 9. Time-depth plot of water transparency at the 

 USNEL tower on 4-5 August 1960. Times of high tide and 

 low tide are indicated along the surface. 



14 



