The assigned value of = 3.0 is acceptable 

 if the hydrologist is mainly interested in the 

 comparative behavior of several watersheds or 

 in the reaction of a single watershed to storms 

 of different magnitude. On the other hand, 



the precise partitioning of stormflow into sur- 

 face runoff and interflow will depend on the 

 exact value ofKas determined under controlled 

 experiments. 



Table 2. — Effect of unit of measurement on results of analysis 



Basic hydrograph unit Basic hydrograph unit 

 Location c.f.s. inch/hr. c.f.s. inch/hr. 



Stormflow as % Surface runoff as % 



of total runoff of stormflow 



Vero Beach, Fla. 



67.53 



69.80 



34.62 







Blacksburg, Va. 



85.20 



60.01 



10.01 



7.89 



N. Danville, Vt. 



46.84 



82.54 



9.38 







Hastings, Neb. 



90.93 



87.19 



33.42 



8.14 



Colby, Wise. 



77.26 



75.12 



9.59 



0.78 



Waco, Tex. 



94.48 



66.30 



10.37 



17.99 



Reynolds, Ida. 



86.64 



59.31 



6.51 



0.37 



Table 3. — Effect of K (Equation 4) on surface runoff as percent of storm- 

 flow during October-November 1968, in the East Fork Horse 

 Creek watershed, Idaho 



Event No. Stormflow K=2 K = 3 K = 4 K = 5 



Cubic ft. /1 00 



19 



6.7 



5.77 



8.60 



11.33 



13.96 



4 



22.5 



1.70 



2.55 



3.40 



4.24 



3 



68.8 



2.17 



3.34 



4.55 



5.81 



23 



98.9 



3.64 



5.36 



7.10 



8.90 



1 



202.6 



0.26 



0.38 



0.49 



0.60 



15 



308.4 



1.54 



2.44 



3.44 



4.53 



34 



613.2 



11.93 



18.53 



24.63 



30.15 



28 



1873.1 



11.79 



19.65 



27.05 



33.63 



16 



3898.0 



11.89 



19.95 



27.10 



33.24 



6 



