Table 5. --Stowvary of Halfway Creek and Miller Creek streamflow 



a. AVERAGE STREAMFLOW BEFORE TRENCHING 



Streamflow 





: Halfway Cr. : 



Miller Cr. 



period 



: Months 



: streamflow : 



streamflow 







Inohes Percent 



Inches Percent 



July thru February 



8 



6.25 33.2 



5.51 33. 1 



March thru June 



4 



12.59 66.8 



11.12 66 . 9 





12 



18.84 100.0 



16 63 inn n 





b . ANNUAL 



STREAMFLOW SINCE TRENCHING 







Streamflow 



from : Predicted* 



Difference 



Year : 



Halfway Cr. : Miller Cr. : Streamflow 



(actual- 







: Halfway Cr. 



predicted) 







------ Inches ------- 





1964-65 



21.58 



21.35 22.04 



-0.46 



1965-66 



15.29 



12.45 15.06 



+ .23 



1966-67 



17.30 



17.27 21.47 



-4.17 



1967-68 



22.91 



21.31 23.23 



- .32 



*Prediction based on regression: Y = -8.876 + 0.506 + 0.487 Xj^^ 

 Where: Y = Halfway Creek streamflow, X. = Miller Creek streamflow, and X.. = Rice 

 Climatic Station precipitation. 



c. SNOWMELT STREAMFLOW SINCE TRENCHING 





Streamflow 



from 



Predicted* 



Difference 



Year 



: Halfway Cr. : 



Miller Cr. 



Streamflow 



(actual- 









Halfway Cr. 



predicted) 







------ Inches ------- 





1965 



14.05 



13.78 



15.52 



-1.47 



1966 



9.42 



7.88 



9.02 



+ .40 



1967 



11.77 



11.24 



12.72 



- .95 



1968 



15.80 



14.44 



16.25 



- .45 





*Prediction based on regression: Y = 0.325 + 



1.103 X 





Where: Y = 



Halfway Creek streamflow, X = Miller Creek streamflow. 



d. LOW STREAMFLOW PERIOD SINCE TRENCHING 





Streamflow 



from 



Predicted* 



Difference 



Year : 



Halfway Cr. : 



Miller Cr. 



Streamflow 



(actual- 









Halfway Cr. 



predicted) 







------ Inches ------- 





1965-66 



6.39 



6.29 



6.59 



-0.20 



1966-67 



5.31 



4.43 



5.78 



- .47 



1967-68 



6.35 



6.86 



6.83 



- .48 



*Prediction based on regression: Y = 3.87 + 0.432 X 

 Where: Y = Halfway Creek streamflow, X = Miller Creek streamflow. 



18 



