The muskingum method in application to watershed management was based from the fundamental hydrologic equation (IO – S), which = among the statements is NOT true:

a. The field observation pertains to inflow-outflow dischages and time interval per reading.

b. Developed by McCarthy in 1938

c. Is a function of both inflow and outflor with respect to discharge.

d. Hydrologic equation was modified and include K-constant and reduction factor x ranges from (0.1-0.3).