TR No. 22 
is equal to the Nyquist wave number, and since velocity variations at 
wave numbers greater than about 0.007 cm-l (see section under "Response 
to Accelerated Flow") can be expected to be attenuated because of the 
dimensions of the current meter, aliasing is not considered a problem. 
FIELD OBSERVATIONS 
Figure 8 is a section of C. & G. S. Chart No. 353 showing the area 
within which measurements were made. The area is located in the Sakonnet 
River between the north end of Aquidneck Island and Tiverton, R. I. The 
area indicated on the chart as Station I is formed from stone breakwaters 
projecting from the island and the mainland. The tidal current at Station I 
is given in Table 1 which was constructed from information given in the tide 
and current tables (20), 
Table 1. Tidal Current at Station I. 
Time with respect to high Current at Station I 
tide at Newport, R. I. ohh ea cs Ree 
High Tide 1.7 knots South 
1 hour(s) after Do oy WW 
2 Ww WwW 3.0 Ww ih] 
3 Lh] ] Di? w i 
m1 " a8 1.2 " 1 
5 WU u 1.1 knots North 
6 i u - see Note 
7 Ww wy = ih Ww 
8 we we a " Ww 
9 W we a Ww ty 
LO) HS 2.3 knots North 
Te M 2.0 knots South 
12 we in) 1.0 w Ww 
NOTE: The current during this time interval is unpredictable, can change 
rapidly from North to South or from South to North, and can be as much as 
3.0 knots in either direction. 
10 
