| dc.description.abstract | Technique baseflow separation can be performed by methods Recursive Digital Filter (RDF). This research dealt with
estimation of baseflow contribution at seven watersheds in the administratif area of UPT PSDA Lumajang. Six methods filter were
used to separated baseflow from total flow. Methodology consist of : (1) data inventorying (2) data processing, (3) calibrating and
validating, and (4) models performances evaluating. Daily discharge were used as main input for the analysis 1996-2005.
Furthermore, each algorithm was calibrate using daily discharge data for each year. The mean values of parameters obtained were
then used to separate baseflow for whole periode of record. RMSE, scatter plot and FDC were used to evaluate the model
performance during dry periode (Juli to September) assuming that for this period no rainfall have occurred. Calibration was
conducted on each the watershed with the same way. Validation was conducted from the watershed complete data (Rawatamtu
watershed). The results showed that filter method, Lynie-Hollick perform better then others algorithms | en_US |
