Abstract
The Boussinesq equation is used to show that base flow recession is an exponential decay function. For a single peaked hydrograph, the storage delay factor Kb, the time for base flow to decrease by a factor of 10, is estimated. The parameter Kb is adjusted by trial so that surface flow, or the observed total flow minus base flow, is also an exponential decay function after the point of inflection on the hydrograph recession. Surface flow Ks is so determined. For 22 basins in Illinois, dormant season Kb ranges from 15–100 days and is associated with physiography. Ks varies from 1.8–6.0 days.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have