Review on Characteristics and Applicability of Digital Filter Baseflow Separation Methods

Baseflow separation method based on the digital filter is a technique for separating baseflow from total streamflow, and appropriate estimation of parameter required analysis. In this study, we reviewed analysis characteristics four methods (Lyne-Hollick, Chapman, Eckhardt, EWMA (exponentially weighted moving average)) according to change in evaluated their applicability. Each was applied Daeri Cheonsong stage stations, which have measurement records five consecutive years tributaries located Nakdonggang River Republic Korea. The Chapman had an error during dry season. not appropriately analyzed within range used previous studies. Lyne-Hollick Eckhardt provided results exploring parameter. However, method, be careful determining because variation relatively large change.