The nun±)er of individuals in the field crew was dependent 

 on the availability of personnel and the wadability of the 

 river reaches. For wadable cross-sections a minimxim crew of 

 two was needed, while at least three persons were needed for 

 unwadable cross-sections. In both cases, as many as five 

 persons were used. Crews of other instream flow projects 

 provided the extra manpower when needed. Brief resumes for 

 all field personnel participating in this project are given in 

 Appendix Table 25. Fred Nelson, the project leader, and 

 Jeff Bagdanov, fisheries field worker, participated in the 

 collection of all field data. 



Recommendations derived from the non-field method (Ten- 

 nant method) required a time expenditure of less than one 

 man-hour per reach at a cost of about $8.00 per reach. 



Reliability of Hydraulic Simulation Models 



IFG-4 Model 



A test of the reliability of the rating curve approach 

 used by the IFG-4 model for predicting hydraulic parameters 

 can be made by examining the correlation coefficients (r) for 

 each set of stage-discharge and velocity-discharge measure- 

 ments. Excellent correlation was found for all 30 of the 

 stage-discharge relationships generated for the 5 subreaches 

 (Table 26) . The r^ values for these relationships range from 



Table 26 . Correlation coefficients^ (r2) for the stage-discharge rela- 

 tionships generated by the IFG-4 hydraulic simulation model 

 for five svODreaches of the Madison, Beaverhead, Gallatin, 

 and Big Hole Rivers. 



C 



( 



Correlation Coefficient^ (r^) 



CS# 



1 

 2 

 3 

 4 

 5 

 6 



c 



99 .99 



79 



