13 



measurement of velocities down to a min- 

 Imam of 0.05 ft per sec (0.5 ft per sec 

 prototype)^ and they were calibrated 

 frequently to insure accuracy of 

 operation. 



21. The upland discharges of the 

 major tributaries to the bays were meas- 

 ured by means of Van Leer (California 

 Pipe) weirs ^ each weir being supplied 

 from a separate constant-head tank. 

 One of the model weirs and its constant- 

 head tank may be seen in the background of fig. 3- 

 introduced in the major tributaries during all tests reported herein^ 

 unless stated differently in the description of a particular test, were 

 as follows: Pawtuxet River^ 'JOO cfs; Woonasquatucket and Moshasuck 

 Rivers, i|00 cfs; Seekonk River, I5OO cfs; and Taunton River, li+00 cfs. 



Fig. 8. Model current meter 



The upland discharges 



